Liabilities / Assets
46th percentile
Higher debt load relative to assets than 46% of similar nonprofits.
EIN 11-1700962 • 501(c)3 • Riverhead, NY
Profile
A historical society that provides educational programs, a museum, and a library for the benefit of students, researchers and the general public.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
46th percentile
Higher debt load relative to assets than 46% of similar nonprofits.
Liabilities / Revenue
67th percentile
Higher debt load relative to revenue than 67% of similar nonprofits.
Net Margin
15th percentile
Higher net margin than 15% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
40th percentile
Faster asset growth than 40% of similar nonprofits.
Revenue Growth
66th percentile
Faster revenue growth than 66% of similar nonprofits.
Assets
Up$2,236,174
Up $11,949 (+0.5%) from 2023
Liabilities
Up$105,187
Up $76,191 (+263%) from 2023
Net Assets
Down$2,130,987
Down $64,242 (-2.9%) from 2023
Revenue
Up$490,063
Up $73,271 (+18%) from 2023
Expenses
Up$588,688
Up $33,831 (+6.1%) from 2023
Net Income
Up-$98,625
Up $39,440 (+29%) from 2023
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
A historical society that provides educational programs, a museum, and a library for the benefit of students, researchers and the general public.
The society provides eduational programs, a museum, and a library for the benefit of students, researchers, and the general public.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $1,433,571 | $1,399,185 | ▼ $34,386 |
| Investments in Publicly Traded Securities | $621,247 | $524,038 | ▼ $97,209 |
| Investments Other Securities | - | $131,609 | - |
| Pledges and Grants Receivable | $3,315 | $68,309 | ▲ $64,994 |
| Cash and Non-Interest-Bearing Accounts | $99,354 | $56,714 | ▼ $42,640 |
| Savings and Temporary Cash Investments | $32,322 | $29,617 | ▼ $2,705 |
| Inventories for Sale or Use | $25,121 | $25,445 | ▲ $324 |
| Prepaid Expenses and Deferred Charges | $9,295 | $1,257 | ▼ $8,038 |
| Total Assets | $2,224,225 | $2,236,174 | ▲ $11,949 |
| Liabilities | |||
| Mortgage Notes Payable Secured by Investment Property | - | $60,385 | - |
| Accounts Payable and Accrued Expenses | $22,401 | $38,667 | ▲ $16,266 |
| Deferred Revenue | $6,595 | $6,135 | ▼ $460 |
| Total Liabilities | $28,996 | $105,187 | ▲ $76,191 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $2,185,656 | $2,121,391 | ▼ $64,265 |
| Net Assets With Donor Restrictions | $9,573 | $9,596 | ▲ $23 |
| Total Net Assets Fund Balance | $2,195,229 | $2,130,987 | ▼ $64,242 |
| Total Liabilities and Net Assets / Fund Balance | $2,224,225 | $2,236,174 | ▲ $11,949 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $1,368,035 | $736,902 | $2,104,937 |
| Equipment | $4,516 | $194,350 | $198,866 |
| Land | $26,634 | - | $26,634 |
| Other Securities | $131,609 | - | - |
| Name | Title | Full / Part Time | Base | Total |
|---|---|---|---|---|
| Ms Victoria Berger | Executive Director | FT | $101,263 | $101,263 |
| Name | Title |
|---|---|
| Mr Steven Lucas | President |
| Mr Judd Kramarcik | Vice President |
| Mr Timothy Carew | Trustee |
| Ms Marylaura Lamont | Trustee |
| Ms Melanie Cardone-leathers | Trustee |
| Ms Kimberly Judd | Secretary |
| Mr Michael Cain | Treasurer |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $346,633 |
| Other Expenses | $242,055 |
| Total Fundraising Expense | $18,286 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $172,357 | $39,037 | $3,381 | $214,775 |
| Current Officers, Directors, Trustees, and Key Employees | $81,011 | $10,126 | $10,126 | $101,263 |
| Depreciation Depletion | $51,508 | $686 | $2,972 | $55,166 |
| Occupancy | $44,007 | $2,326 | - | $46,333 |
| Payroll Taxes | $19,384 | $3,760 | $1,033 | $24,177 |
| Office Expenses | $13,988 | $5,843 | $278 | $20,109 |
| Insurance | $17,738 | $511 | - | $18,249 |
| Fees for Services Accounting | - | $16,500 | - | $16,500 |
| Advertising | $10,455 | - | - | $10,455 |
| Fees for Services Other | $8,111 | $251 | - | $8,362 |
| Fees for Service Investment Mgmnt Fees | - | $8,007 | - | $8,007 |
| Other Employee Benefits | $5,145 | $999 | $274 | $6,418 |
| Interest | - | $3,881 | - | $3,881 |
| Other Expenses | $983 | $235 | $222 | $1,218 |
| Total Functional Expenses | $475,391 | $95,011 | $18,286 | $588,688 |
| Line Item | Amount |
|---|---|
| Total Expenses per Form 990 | $588,688 |
| Expenses per Audited Statements | $580,473 |
| Total Expenses per Audited Statements | $580,473 |
| Expenses Not Reported on Financial Statements | $8,215 |
| Other Expense Adjustments | $208 |
| Expenses Not Reported on Form 990 | $0 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“The society's membership is mainly made up of individuals who reside in the county of suffolk. The society charges a membership fee which entitles the member to free use of the society's library collections, including research services and photocopying of research material at a reduced rate. Members also recieve a 10% discount in the society's museum gift shop.”
“All officers and directors must be members of the society and shall be elected by a plurality of votes cast by ballot at the annual meeting by members of the society.”
“The constitution and by-laws may be amended at any regular meeting of the society by a two third (2/3) vote of those voting, provided a thirty (30) day notice in writing of the proposed change be served by mail on each member. Or it may be amended at a special meeting called for that purpose, with the required previous notice and a two third (2/3) vote. All proposed amendments shall be submitted in writing.”
“The form 990 is prepared by the auditors,based on the audited financial statement, and is reviewed by the director, treasurer and the audit committee before released by the director.”
“Annual review of written policy, with acknowledgement signatures, by all trustees and officers. Signatures are affixed during a regular trustees meeting at which opportunity to discuss or ask questions is afforded to all involved, and the signature sheet is included in the minutes of the meeting.”
“Per written policy, the board (all board members are independent and free of related conflicts of interest) conducts an annual performance and compensation review of the executive director, including consideration of comparative compensation data, and determines compensation and contract adjustments. The review is reported in the board minutes. No officers receive compensation. There are no "other key employees" as defined in the instructions for part vii section a.”
“The organization's governing documents and financial statements are available upon request. No such requests were received during 2024.”
“In accordance with asu 2019-03, the society does not capitalize donated works of art or recognize them as revenues or gains on the statement of activities. That statement provides that such donations need not be recognized if they are added to collections that are held for public exhibition, education or research in furtherance of public service rather than financial gain; are protected, kept unemcumbered, cared for, and preserved; and are subject to a policy that requires the proceeds from sales of collection items to be used to acquire other items for collections. In addition, items acquired through purchase are not capitalized. Purchases of collection items are recorded as decreases in net assets without donor restriction if purchased with such assets and as decreases in net assets with donor restriction if purchased with donor restricted assets. Proceeds from the sale of collection items are presented as an increase in net assets. The society's collection's management policy establishes four broad categories of collections, general history, decorative arts, fine and folk arts, and ethnographic and natural history, which guide the society's collecting practices. Within these catagories there are smaller groupings of diverse historical objects that include items such as arms and armament, costumes, tools and equipment, ceramics, furniture, glass, textiles, paintings, drawings, sculpture, graphic arts, musical instruments,projectile points and stone tools,native american handiwork and wildlife specimens. The general history (costume, tools and equipment,dolls, toys and games)and the decorative arts (ceramics, furniture and textiles) are considered the "primary collections" of the society. The library and archival collections are divided into two broad categories, each with sub-groupings. The library collections include materials for general historical research, genealogical research and cultural resource publications. The archive includes personal papers, account books, diaries, maritime documents, photographs, maps and railroad materials. The photograph collections, and manuscript collections (original documents) are irreplaceable, and therefore are considered to be of greater importance relative to other collections.”
“Accounting standards require that management evaluate the accounting for uncertainty in tax positions. Companies are required to recognize in their financial statements the impact of a tax position if the position is more likely than not of being sustained on audit. The positon ascertained inherently requires judgment and estimates by management. For the years ended december 31, 2024 and 2023 the society does not believe that they have any material uncertain tax positions that would require them to measure and reflect the potential lack of sustainability of a position on audit in their financial statements. Mangement will continue to evaluate their tax positions to determine if measurement and recognition in the presentation of financial statements is required. The society believes it is no longer subject to examination prior to 2021. .”
“Inventory adjustment for cost of merchandise sold”
“Inventory adjustment for cost of merchandise sold”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 22401 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 38667 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | THE SOCIETY PROVIDES EDUATIONAL PROGRAMS, A MUSEUM, AND A LIBRARY FOR THE BENEFIT OF STUDENTS, RESEARCHERS, AND THE GENERAL PUBLIC. |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 10455 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 10455 |
| IRS990/AllOtherContributionsAmt | 0 | 24033 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | SUFFOLK COUNTY HISTORICAL SOCIETY |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6317272881 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 300 WEST MAIN STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | RIVERHEAD |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | NY |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 11901 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 99354 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 56714 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 1 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 10126 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 10126 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 81011 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 101263 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CostOfGoodsSoldAmt | 0 | -208 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 446626 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 39923 |
| IRS990/CYOtherExpensesAmt | 0 | 242055 |
| IRS990/CYOtherRevenueAmt | 0 | 1494 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 2020 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -98625 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 346633 |
| IRS990/CYTotalExpensesAmt | 0 | 588688 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 18286 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 490063 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 1 |
| IRS990/DeductibleArtContributionInd | 0 | 1 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 6595 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 6135 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 2972 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 686 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 51508 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 55166 |
| IRS990/Desc | 0 | EDUCATION PROGRAMS - SERVES LOCAL SCHOOL DISTRICTS AND THE PUBLIC ON THE HISTORY OF SUFFOLK COUNTY, IT'S PEOPLE AND PLACES: ALSO COMPUTER INTEREST GROUPS AND GENEAOLOGISTS. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 9573 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 9596 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 1 |
| IRS990/EmployeeCnt | 0 | 12 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 16500 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 16500 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 251 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 8111 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 8362 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 8007 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 8007 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form1098CFiledInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form8899Filedind | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 10.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | MS VICTORIA BERGER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | MS MARYLAURA LAMONT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | MR TIMOTHY CAREW |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | MS MELANIE CARDONE-LEATHERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | MR MICHAEL CAIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | MR STEVEN LUCAS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | MS KIMBERLY JUDD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | MR JUDD KRAMARCIK |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 101263 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | EXECUTIVE DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | VICE PRESIDENT |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1886 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 8994 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 7 |
| IRS990/GovernmentGrantsAmt | 0 | 409018 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 124645 |
| IRS990/GrossReceiptsAmt | 0 | 605506 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 1286 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 7 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 511 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 17738 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 18249 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 3881 |
| IRS990/InterestGrp/TotalAmt | 0 | 3881 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 25121 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 25445 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 30929 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 30929 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 131609 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 621247 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 524038 |
| IRS990/IRPDocumentCnt | 0 | 10 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/JointCostsInd | 0 | X |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 931252 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 1433571 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 1399185 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 2330437 |
| IRS990/LegalDomicileStateCd | 0 | NY |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 115651 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 13575 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | A HISTORICAL SOCIETY THAT PROVIDES EDUCATIONAL PROGRAMS, A MUSEUM, AND A LIBRARY FOR THE BENEFIT OF STUDENTS, RESEARCHERS AND THE GENERAL PUBLIC. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 60385 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 2195229 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 2130987 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 8994 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 8994 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 1494 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 1494 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 34383 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 2185656 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 2121391 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 2326 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 44007 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 46333 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 278 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 5843 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 13988 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 20109 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 274 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 999 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 5145 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 6418 |
| IRS990/OtherExpensesGrp/Desc | 0 | EXHIBITS AND CONSERVATI |
| IRS990/OtherExpensesGrp/Desc | 1 | MISCELLANEOUS |
| IRS990/OtherExpensesGrp/Desc | 2 | MEMBERSHIP AND SUBSCRIP |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 222 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 2849 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 235 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 49470 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 1234 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 983 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 49692 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 4083 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 1218 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 3381 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 39037 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 172357 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 214775 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 1033 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 3760 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 19384 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 24177 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 3315 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 68309 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 9295 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 1257 |
| IRS990/PrincipalOfficerNm | 0 | MICHAEL CAIN |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | 3RESEARCH LIBRARY - PUBLIC AND EDUCATIONAL REFERENCE LIBRARY PROVIDING HISTORICAL DOCUMENTS AND GENEOLOGICAL/HISTORY PROGRAMS |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 118326 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 1068 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | MUSEUM- PUBLIC AND EDUCATIONAL DISPLAYS AND EXHIBITS REFLECTING THE HISTORY OF SUFFOLK COUNTY. |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 357065 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 399840 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 13346 |
| IRS990/PYOtherExpensesAmt | 0 | 213262 |
| IRS990/PYOtherRevenueAmt | 0 | 907 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 2699 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -138065 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 341595 |
| IRS990/PYTotalExpensesAmt | 0 | 554857 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 416792 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -98625 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 1 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 0 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 952 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 32322 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 29617 |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | DESCRIPTION: BEQUEST DATE: 11/23/20 AMOUNT: 161560. DESCRIPTION: BEQUEST DATE: 05/11/22 AMOUNT: 41667. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | SCHEDULE A, PART VI, LIST OF UNUSUAL GRANTS: |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 446626 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 399840 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 391378 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 460833 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 436359 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 2135036 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 30929 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 22550 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 16004 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 31623 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 18613 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 119719 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.94690 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.90220 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 2135036 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 446626 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 399840 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 391378 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 460833 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 436359 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 2135036 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 2254755 |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 1368035 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 736902 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 2104937 |
| IRS990ScheduleD/CollectionUsedPreservationInd | 0 | X |
| IRS990ScheduleD/CollectionUsedPubExhibitionInd | 0 | X |
| IRS990ScheduleD/CollUsedScholarlyRsrchInd | 0 | X |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 4516 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 194350 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 198866 |
| IRS990ScheduleD/ExpensesNotReportedAmt | 0 | 0 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | 8215 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 580473 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/InvestmentExpensesNotIncld2Amt | 0 | 8007 |
| IRS990ScheduleD/InvestmentExpensesNotIncldAmt | 0 | 8007 |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 26634 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 26634 |
| IRS990ScheduleD/NetUnrealizedGainsInvstAmt | 0 | 34383 |
| IRS990ScheduleD/OtherExpensesNotIncludedAmt | 0 | 208 |
| IRS990ScheduleD/OtherRevenuesNotIncludedAmt | 0 | 208 |
| IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt | 0 | 131609 |
| IRS990ScheduleD/OtherSecuritiesGrp/Desc | 0 | FIRST EAGLE GLOBAL (SGIIX) 1952.361 SHARES |
| IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd | 0 | F |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 34383 |
| IRS990ScheduleD/RevenueNotReportedFinclStmtAmt | 0 | 8215 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 481848 |
| IRS990ScheduleD/SolicitedAssetsSaleInd | 0 | 0 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | IN ACCORDANCE WITH ASU 2019-03, THE SOCIETY DOES NOT CAPITALIZE DONATED WORKS OF ART OR RECOGNIZE THEM AS REVENUES OR GAINS ON THE STATEMENT OF ACTIVITIES. THAT STATEMENT PROVIDES THAT SUCH DONATIONS NEED NOT BE RECOGNIZED IF THEY ARE ADDED TO COLLECTIONS THAT ARE HELD FOR PUBLIC EXHIBITION, EDUCATION OR RESEARCH IN FURTHERANCE OF PUBLIC SERVICE RATHER THAN FINANCIAL GAIN; ARE PROTECTED, KEPT UNEMCUMBERED, CARED FOR, AND PRESERVED; AND ARE SUBJECT TO A POLICY THAT REQUIRES THE PROCEEDS FROM SALES OF COLLECTION ITEMS TO BE USED TO ACQUIRE OTHER ITEMS FOR COLLECTIONS. IN ADDITION, ITEMS ACQUIRED THROUGH PURCHASE ARE NOT CAPITALIZED. PURCHASES OF COLLECTION ITEMS ARE RECORDED AS DECREASES IN NET ASSETS WITHOUT DONOR RESTRICTION IF PURCHASED WITH SUCH ASSETS AND AS DECREASES IN NET ASSETS WITH DONOR RESTRICTION IF PURCHASED WITH DONOR RESTRICTED ASSETS. PROCEEDS FROM THE SALE OF COLLECTION ITEMS ARE PRESENTED AS AN INCREASE IN NET ASSETS. THE SOCIETY'S COLLECTION'S MANAGEMENT POLICY ESTABLISHES FOUR BROAD CATEGORIES OF COLLECTIONS, GENERAL HISTORY, DECORATIVE ARTS, FINE AND FOLK ARTS, AND ETHNOGRAPHIC AND NATURAL HISTORY, WHICH GUIDE THE SOCIETY'S COLLECTING PRACTICES. WITHIN THESE CATAGORIES THERE ARE SMALLER GROUPINGS OF DIVERSE HISTORICAL OBJECTS THAT INCLUDE ITEMS SUCH AS ARMS AND ARMAMENT, COSTUMES, TOOLS AND EQUIPMENT, CERAMICS, FURNITURE, GLASS, TEXTILES, PAINTINGS, DRAWINGS, SCULPTURE, GRAPHIC ARTS, MUSICAL INSTRUMENTS,PROJECTILE POINTS AND STONE TOOLS,NATIVE AMERICAN HANDIWORK AND WILDLIFE SPECIMENS. THE GENERAL HISTORY (COSTUME, TOOLS AND EQUIPMENT,DOLLS, TOYS AND GAMES)AND THE DECORATIVE ARTS (CERAMICS, FURNITURE AND TEXTILES) ARE CONSIDERED THE "PRIMARY COLLECTIONS" OF THE SOCIETY. THE LIBRARY AND ARCHIVAL COLLECTIONS ARE DIVIDED INTO TWO BROAD CATEGORIES, EACH WITH SUB-GROUPINGS. THE LIBRARY COLLECTIONS INCLUDE MATERIALS FOR GENERAL HISTORICAL RESEARCH, GENEALOGICAL RESEARCH AND CULTURAL RESOURCE PUBLICATIONS. THE ARCHIVE INCLUDES PERSONAL PAPERS, ACCOUNT BOOKS, DIARIES, MARITIME DOCUMENTS, PHOTOGRAPHS, MAPS AND RAILROAD MATERIALS. THE PHOTOGRAPH COLLECTIONS, AND MANUSCRIPT COLLECTIONS (ORIGINAL DOCUMENTS) ARE IRREPLACEABLE, AND THEREFORE ARE CONSIDERED TO BE OF GREATER IMPORTANCE RELATIVE TO OTHER COLLECTIONS. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | ACCOUNTING STANDARDS REQUIRE THAT MANAGEMENT EVALUATE THE ACCOUNTING FOR UNCERTAINTY IN TAX POSITIONS. COMPANIES ARE REQUIRED TO RECOGNIZE IN THEIR FINANCIAL STATEMENTS THE IMPACT OF A TAX POSITION IF THE POSITION IS MORE LIKELY THAN NOT OF BEING SUSTAINED ON AUDIT. THE POSITON ASCERTAINED INHERENTLY REQUIRES JUDGMENT AND ESTIMATES BY MANAGEMENT. FOR THE YEARS ENDED DECEMBER 31, 2024 AND 2023 THE SOCIETY DOES NOT BELIEVE THAT THEY HAVE ANY MATERIAL UNCERTAIN TAX POSITIONS THAT WOULD REQUIRE THEM TO MEASURE AND REFLECT THE POTENTIAL LACK OF SUSTAINABILITY OF A POSITION ON AUDIT IN THEIR FINANCIAL STATEMENTS. MANGEMENT WILL CONTINUE TO EVALUATE THEIR TAX POSITIONS TO DETERMINE IF MEASUREMENT AND RECOGNITION IN THE PRESENTATION OF FINANCIAL STATEMENTS IS REQUIRED. THE SOCIETY BELIEVES IT IS NO LONGER SUBJECT TO EXAMINATION PRIOR TO 2021. . |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 2 | INVENTORY ADJUSTMENT FOR COST OF MERCHANDISE SOLD |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 3 | INVENTORY ADJUSTMENT FOR COST OF MERCHANDISE SOLD |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART III, LINE 1A: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART X, LINE 2: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | PART XI, LINE 4B - OTHER ADJUSTMENTS: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | PART XII, LINE 4B - OTHER ADJUSTMENTS: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 1399185 |
| IRS990ScheduleD/TotalBookValueSecuritiesAmt | 0 | 131609 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 588688 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 490063 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 516231 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 580473 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990ScheduleM/AnyPropertyThatMustBeHeldInd | 0 | 0 |
| IRS990ScheduleM/HistoricalArtifactsGrp/ContributionCnt | 0 | 12655 |
| IRS990ScheduleM/HistoricalArtifactsGrp/NonCashCheckboxInd | 0 | X |
| IRS990ScheduleM/ReviewProcessUnusualNCGiftsInd | 0 | 0 |
| IRS990ScheduleM/SupplementalInformationDetail/ExplanationTxt | 0 | THE SOCIETY DOES NOT CAPITALIZE ITS COLLECTION ITEMS. NO VALUE IS ASSIGNED. |
| IRS990ScheduleM/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART I, LINE 33: |
| IRS990ScheduleM/ThirdPartiesUsedInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE SOCIETY'S MEMBERSHIP IS MAINLY MADE UP OF INDIVIDUALS WHO RESIDE IN THE COUNTY OF SUFFOLK. THE SOCIETY CHARGES A MEMBERSHIP FEE WHICH ENTITLES THE MEMBER TO FREE USE OF THE SOCIETY'S LIBRARY COLLECTIONS, INCLUDING RESEARCH SERVICES AND PHOTOCOPYING OF RESEARCH MATERIAL AT A REDUCED RATE. MEMBERS ALSO RECIEVE A 10% DISCOUNT IN THE SOCIETY'S MUSEUM GIFT SHOP. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | ALL OFFICERS AND DIRECTORS MUST BE MEMBERS OF THE SOCIETY AND SHALL BE ELECTED BY A PLURALITY OF VOTES CAST BY BALLOT AT THE ANNUAL MEETING BY MEMBERS OF THE SOCIETY. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | THE CONSTITUTION AND BY-LAWS MAY BE AMENDED AT ANY REGULAR MEETING OF THE SOCIETY BY A TWO THIRD (2/3) VOTE OF THOSE VOTING, PROVIDED A THIRTY (30) DAY NOTICE IN WRITING OF THE PROPOSED CHANGE BE SERVED BY MAIL ON EACH MEMBER. OR IT MAY BE AMENDED AT A SPECIAL MEETING CALLED FOR THAT PURPOSE, WITH THE REQUIRED PREVIOUS NOTICE AND A TWO THIRD (2/3) VOTE. ALL PROPOSED AMENDMENTS SHALL BE SUBMITTED IN WRITING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | THE FORM 990 IS PREPARED BY THE AUDITORS,BASED ON THE AUDITED FINANCIAL STATEMENT, AND IS REVIEWED BY THE DIRECTOR, TREASURER AND THE AUDIT COMMITTEE BEFORE RELEASED BY THE DIRECTOR. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | ANNUAL REVIEW OF WRITTEN POLICY, WITH ACKNOWLEDGEMENT SIGNATURES, BY ALL TRUSTEES AND OFFICERS. SIGNATURES ARE AFFIXED DURING A REGULAR TRUSTEES MEETING AT WHICH OPPORTUNITY TO DISCUSS OR ASK QUESTIONS IS AFFORDED TO ALL INVOLVED, AND THE SIGNATURE SHEET IS INCLUDED IN THE MINUTES OF THE MEETING. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | PER WRITTEN POLICY, THE BOARD (ALL BOARD MEMBERS ARE INDEPENDENT AND FREE OF RELATED CONFLICTS OF INTEREST) CONDUCTS AN ANNUAL PERFORMANCE AND COMPENSATION REVIEW OF THE EXECUTIVE DIRECTOR, INCLUDING CONSIDERATION OF COMPARATIVE COMPENSATION DATA, AND DETERMINES COMPENSATION AND CONTRACT ADJUSTMENTS. THE REVIEW IS REPORTED IN THE BOARD MINUTES. NO OFFICERS RECEIVE COMPENSATION. THERE ARE NO "OTHER KEY EMPLOYEES" AS DEFINED IN THE INSTRUCTIONS FOR PART VII SECTION A. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 6 | THE ORGANIZATION'S GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST. NO SUCH REQUESTS WERE RECEIVED DURING 2024. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION A, LINE 6 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION A, LINE 7A |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION A, LINE 7B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PART VI, SECTION B, LINE 12C |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 5 | FORM 990, PART VI, SECTION B, LINE 15 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 6 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990/SchoolOperatingInd | 0 | 0 |
| IRS990/SignificantChangeInd | 0 | 0 |
| IRS990/SignificantNewProgramSrvcInd | 0 | 0 |
| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | NY |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | 0 |
| IRS990/SubjectToProxyTaxInd | 0 | 0 |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | 0 |
| IRS990/TaxablePartyNotificationInd | 0 | 0 |
| IRS990/TaxExemptBondsInd | 0 | 0 |
| IRS990/TerminateOperationsInd | 0 | 0 |
| IRS990/TotalAssetsBOYAmt | 0 | 2224225 |
| IRS990/TotalAssetsEOYAmt | 0 | 2236174 |
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