Liabilities / Assets
33rd percentile
Tied with the lowest-debt nonprofits in its peer group.
EIN 04-2790266 • 501(c)3 • Rockport, MA
Profile
Historic preservation of thacher island, straitsmouth island, its lighthouses, buildings and facilities
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
33rd percentile
Tied with the lowest-debt nonprofits in its peer group.
Liabilities / Revenue
34th percentile
Tied with the lowest-debt nonprofits in its peer group.
Net Margin
4th percentile
Higher net margin than 4% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
9th percentile
Faster asset growth than 9% of similar nonprofits.
Revenue Growth
66th percentile
Faster revenue growth than 66% of similar nonprofits.
Assets
Down$687,798
Down $284,014 (-29%) from 2023
Liabilities
Flat$0
Flat from 2023
Net Assets
Down$687,798
Down $284,014 (-29%) from 2023
Revenue
Up$275,513
Up $43,947 (+19%) from 2023
Expenses
Up$580,330
Up $404,499 (+230%) from 2023
Net Income
Down-$304,817
Down $360,552 (-647%) from 2023
Most recent year
2024 • Form 990XML pending. An XML filing is linked for this year, but detailed extraction is still pending.
The latest 2024 filing currently has linked XML that has not been fully parsed yet. Showing the latest detailed filing from 2023 below.
Historic preservation of thacher island, straitsmouth island, its lighthouses, buildings and facilities
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $590,333 | $704,806 | ▲ $114,473 |
| Savings and Temporary Cash Investments | $150,955 | $174,535 | ▲ $23,580 |
| Cash and Non-Interest-Bearing Accounts | $91,834 | $92,471 | ▲ $637 |
| Total Assets | $833,122 | $971,812 | ▲ $138,690 |
| Liabilities | |||
| Total Liabilities | $0 | $0 | → $0 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $833,122 | $971,812 | ▲ $138,690 |
| Total Net Assets Fund Balance | $833,122 | $971,812 | ▲ $138,690 |
| Total Liabilities and Net Assets / Fund Balance | $833,122 | $971,812 | ▲ $138,690 |
| Name | Title |
|---|---|
| William Whiting | President |
| Paul Stgermain | President Em |
| Bill Sclafani | Director |
| Christine Lovgren | Director |
| Don Southard | Director |
| Gail Zeman | Director |
| George Langer | Director |
| Jeff Taylor | Director |
| Judy Leach | Director |
| Karen Wise | Director |
| Nathan Ives | Director |
| Patricia Wegmann | Director |
| Peter Bergholtz | Director |
| Rich Calnan | Director |
| Richard Macpherson | Director |
| William Braunlich | Director |
| Kristy Rudel | Secretary |
| Meredith Glaser | Treasurer |
| Randy Saville | VP |
| Line Item | Amount |
|---|---|
| Other Expenses | $175,831 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Office Expenses | - | $28,158 | - | $28,158 |
| Other Expenses | $5,872 | $6,451 | - | $5,872 |
| Fees for Service Investment Mgmnt Fees | - | $4,884 | - | $4,884 |
| Fees for Services Accounting | - | $825 | - | $825 |
| All Other Expenses | - | $125 | - | $125 |
| Total Functional Expenses | $135,388 | $40,443 | $0 | $175,831 |
| Line Item | Amount |
|---|---|
| Fundraising Gross Income | $28,624 |
| Fundraising Direct Expenses | $9,370 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Cruise | $21,069 | $21,069 | $2,300 | $18,769 |
| Island Camping | $7,555 | $7,555 | $7,070 | $485 |
| Total Events | $28,624 | $28,624 | $9,370 | $19,254 |
“No review was or will be conducted.”
“Upon written request and approval from board”
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 | false |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | HISTORIC PRESERVATION OF THACHER ISLAND, STRAITSMOUTH ISLAND, ITS LIGHTHOUSES, BUILDINGS AND FACILITIES |
| IRS990/AllOtherContributionsAmt | 0 | 137123 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 125 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 125 |
| IRS990/BackupWthldComplianceInd | 0 | false |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | WILLIAM WHITING |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 9785462250 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 30 MARMION WAY |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | ROCKPORT |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 01966 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 91834 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 92471 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConflictOfInterestPolicyInd | 0 | false |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CostOfGoodsSoldAmt | 0 | 5207 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 169931 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 30095 |
| IRS990/CYOtherExpensesAmt | 0 | 175831 |
| IRS990/CYOtherRevenueAmt | 0 | 31540 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 55735 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 175831 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 231566 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/Desc | 0 | SEE PART VIII AND IX |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 135388 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 825 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 825 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 4884 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 4884 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 14 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 15 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | 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/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | WILLIAM WHITING |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | RANDY SAVILLE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | MEREDITH GLASER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | KRISTY RUDEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | PAUL STGERMAIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | PETER BERGHOLTZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | WILLIAM BRAUNLICH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | RICH CALNAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | NATHAN IVES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | JUDY LEACH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | CHRISTINE LOVGREN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | RICHARD MACPHERSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | DON SOUTHARD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | JEFF TAYLOR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | KAREN WISE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | BILL SCLAFANI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | GEORGE LANGER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | PATRICIA WEGMANN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | GAIL ZEMAN |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| 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/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 18 | 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/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VP |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | PRESIDENT EM |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/FormationYr | 0 | 1983 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingDirectExpensesAmt | 0 | 9370 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 28624 |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 8897 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | -772 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 18 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 8897 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 11171 |
| IRS990/GrossReceiptsAmt | 0 | 258086 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 17493 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 18 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 18824 |
| IRS990/InvestmentIncomeGrp/RelatedOrExemptFuncIncomeAmt | 0 | 3146 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 21970 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 590333 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 704806 |
| IRS990/IRPDocumentCnt | 0 | 5 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 11943 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 32808 |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | HISTORIC PRESERVATION OF THACHER ISLAND, STRAITSMOUTH ISLAND, ITS LIGHTHOUSES, BUILDINGS AND FACILITIES |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NameChangeInd | 0 | X |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 833122 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 971812 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 8897 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | -772 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 8125 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 19254 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 12286 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 12286 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 82955 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 833122 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 971812 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 28158 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 28158 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherExpensesGrp/Desc | 0 | BOAT EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 1 | REPAIRS AND MAINTENANCE |
| IRS990/OtherExpensesGrp/Desc | 2 | TELEPHONE & INTERNET |
| IRS990/OtherExpensesGrp/Desc | 3 | STRAITSMOUTH RESTORATION |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 6451 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 72802 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 56714 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 5872 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 72802 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 56714 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 6451 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 5872 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | WILLIAM WHITING |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 402521 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 28356 |
| IRS990/PYOtherExpensesAmt | 0 | 218586 |
| IRS990/PYOtherRevenueAmt | 0 | 32352 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 244643 |
| IRS990/PYTotalExpensesAmt | 0 | 218586 |
| IRS990/PYTotalRevenueAmt | 0 | 463229 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 55735 |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | false |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 150955 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 174535 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt | 0 | 169931 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt | 0 | 402521 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 350284 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 52960 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 76545 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt | 0 | 1052241 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearAmt | 0 | 18824 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus1YearAmt | 0 | 12751 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 14305 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 10494 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 9811 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/TotalAmt | 0 | 66185 |
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| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus1YearAmt | 0 | 62480 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus2YearsAmt | 0 | 36839 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus3YearsAmt | 0 | 8576 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus4YearsAmt | 0 | 20548 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/TotalAmt | 0 | 177706 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearAmt | 0 | 18824 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus1YearAmt | 0 | 12751 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus2YearsAmt | 0 | 14305 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus3YearsAmt | 0 | 10494 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus4YearsAmt | 0 | 9811 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/TotalAmt | 0 | 66185 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0.05000 |
| IRS990ScheduleA/InvestmentIncomePYPct | 0 | 0.05000 |
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| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0.94890 |
| IRS990ScheduleA/PublicSupportPY509Pct | 0 | 0.95070 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 1229947 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind | 0 | X |
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| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt | 0 | 465001 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 387123 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 61536 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 97093 |
| IRS990ScheduleA/Total509Grp/TotalAmt | 0 | 1229947 |
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| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus1YearAmt | 0 | 477752 |
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| IRS990ScheduleG/FundraisingEventInformationGrp/Event2Nm | 0 | ISLAND CAMPING |
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| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent2Amt | 0 | 7555 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsTotalAmt | 0 | 28624 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent1Amt | 0 | 21069 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent2Amt | 0 | 7555 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueTotalEventsAmt | 0 | 28624 |
| IRS990ScheduleG/FundraisingEventInformationGrp/NetIncomeSummaryAmt | 0 | 19254 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssTotalEventsAmt | 0 | 9370 |
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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | NO REVIEW WAS OR WILL BE CONDUCTED. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | UPON WRITTEN REQUEST AND APPROVAL FROM BOARD |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PAGE 6, PART VI, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PAGE 6, PART VI, LINE 19 |
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| IRS990/SignificantChangeInd | 0 | false |
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| IRS990/TaxablePartyNotificationInd | 0 | false |
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| IRS990/TotalAssetsGrp/EOYAmt | 0 | 971812 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 169931 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 0 |
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| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 135388 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 175831 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 0 |
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| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 833122 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 971812 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 135388 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 27721 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 14660 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 231566 |
| IRS990/TotalVolunteersCnt | 0 | 70 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 833122 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 971812 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | false |
| IRS990/TypeOfOrganizationAssocInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | 30 MARMION WAY |
| IRS990/USAddress/CityNm | 0 | ROCKPORT |
| IRS990/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/USAddress/ZIPCd | 0 | 01966 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 18 |
| IRS990/VotingMembersIndependentCnt | 0 | 18 |
| IRS990/WebsiteAddressTxt | 0 | WWW.THACHERISLAND.ORG |
| IRS990/WhistleblowerPolicyInd | 0 | false |
| ReturnHeader/BuildTS | 0 | 2024-10-15 13:58:12Z |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | WILLIAM WHITING |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | PRESIDENT |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 9785467214 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2024-11-04 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | THACHER & STRAITSMOUTH ISLANDS |
| ReturnHeader/Filer/BusinessName/BusinessNameLine2Txt | 0 | ASSOCIATION |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | THAC |
| ReturnHeader/Filer/EIN | 0 | 042790266 |
| ReturnHeader/Filer/PhoneNum | 0 | 9785462250 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | P O BOX 73 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | ROCKPORT |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | MA |
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