Liabilities / Assets
33rd percentile
Tied with the lowest-debt nonprofits in its peer group.
EIN 51-0137906 • 501(c)3 • Mount Desert, ME
Profile
The mission of the mount desert island historical society is to foster meaningful engagement with the histories of mount desert island
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
35th percentile
Tied with the lowest-debt nonprofits in its peer group.
Net Margin
62nd percentile
Higher net margin than 62% of similar nonprofits.
Top Officer Pay
55th percentile
Higher top officer pay than 55% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
62nd percentile
Faster asset growth than 62% of similar nonprofits.
Revenue Growth
86th percentile
Faster revenue growth than 86% of similar nonprofits.
Assets
Up$882,121
Up $71,783 (+8.9%) from 2024
Liabilities
Flat$0
Flat from 2024
Net Assets
Up$882,121
Up $71,783 (+8.9%) from 2024
Revenue
Up$561,989
Up $223,105 (+66%) from 2024
Expenses
Up$498,708
Up $148,924 (+43%) from 2024
Net Income
Up$63,281
Up $74,181 (+681%) from 2024
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
The mission of the mount desert island historical society is to foster meaningful engagement with the histories of mount desert island
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $171,039 | $170,009 | ▼ $1,030 |
| Savings and Temporary Cash Investments | $89,110 | $130,784 | ▲ $41,674 |
| Investments Other Securities | $73,689 | $79,579 | ▲ $5,890 |
| Cash and Non-Interest-Bearing Accounts | $1,501 | $1,502 | ▲ $1 |
| Total Assets | $810,338 | $882,121 | ▲ $71,783 |
| Other Assets Total | $474,999 | $500,247 | ▲ $25,248 |
| Liabilities | |||
| Total Liabilities | $0 | $0 | → $0 |
| Net Assets / Fund Balance | |||
| Net Assets With Donor Restrictions | $474,999 | $446,609 | ▼ $28,390 |
| Net Assets Without Donor Restrictions | $335,339 | $435,512 | ▲ $100,173 |
| Total Net Assets Fund Balance | $810,338 | $882,121 | ▲ $71,783 |
| Total Liabilities and Net Assets / Fund Balance | $810,338 | $882,121 | ▲ $71,783 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $161,215 | $223,738 | $384,953 |
| Equipment | $69,632 | - | $69,632 |
| Other Land Buildings | $-60,838 | $89,910 | $29,072 |
| Other Assets Org | $500,247 | - | - |
| Other Securities | $79,579 | - | - |
| Name | Title |
|---|---|
| Robin Lawton | President |
| Anna Durand | Board Member |
| Bob Bell | Board Member |
| Bonny Rogers | Board Member |
| David Macdonald | Board Member |
| Dru Colbert | Board Member |
| Durlin Lunt | Board Member |
| John Wilson | Board Member |
| Johnny Hass | Board Member |
| Jonathan Winthrop | Board Member |
| Karl Kusserow | Board Member |
| Oka Hutchins | Board Member |
| Phamilton Clark | Board Member |
| Rick Wheeler | Board Member |
| William Horner | Board Member |
| Benjamin Pierce | Secretary |
| Michael Pancoe | Treasurer |
| Vassar Pierce | Vice Preside |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $285,751 |
| Other Expenses | $212,957 |
| Total Fundraising Expense | $44,695 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $110,456 | $113,478 | $41,520 | $265,454 |
| Occupancy | $47,606 | $5,290 | - | $52,896 |
| Office Expenses | $25,615 | $13,492 | - | $39,107 |
| Payroll Taxes | $8,445 | $8,677 | $3,175 | $20,297 |
| Depreciation Depletion | $11,546 | - | - | $11,546 |
| Fees for Service Investment Mgmnt Fees | - | $9,855 | - | $9,855 |
| Insurance | $6,915 | $521 | - | $7,436 |
| Other Expenses | $4,874 | - | - | $4,874 |
| Fees for Services Other | - | $4,667 | - | $4,667 |
| Travel | $1,337 | - | - | $1,337 |
| Fees for Services Accounting | - | $1,245 | - | $1,245 |
| All Other Expenses | $751 | - | - | $751 |
| Advertising | $378 | - | - | $378 |
| Total Functional Expenses | $296,788 | $157,225 | $44,695 | $498,708 |
| Line Item | Amount |
|---|---|
| Expenses per Audited Statements | $498,708 |
| Total Expenses per Audited Statements | $498,708 |
| Total Expenses per Form 990 | $498,708 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
“Membership is open to the public”
“Board is elected by members”
“Tax return is reviewed by executive director and board members prior to filing”
“Policy is presented when director joins organization”
“The organizations tax return is available for public inspection at its' office in mount desert, maine tax return is posted on guidestar”
“The organizations governing documents, conflict of interest policy and financial statements are avaiable upon request for public inspection at the main office located in mount desert, maine”
“Change in value of beneficial interest 19,030”
“Direct costs reported net on 990 0 change in benficial interest 0”
“Direct costs reported net on 990 0”
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 | THE MISSION OF THE MOUNT DESERT ISLAND HISTORICAL SOCIETY IS TO FOSTER MEANINGFUL ENGAGEMENT WITH THE HISTORIES OF MOUNT DESERT ISLAND |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 378 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 378 |
| IRS990/AllOtherContributionsAmt | 0 | 62441 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 751 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 751 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | RANEY BENCH |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2072769323 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | PO BOX 653 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | MOUNT DESERT |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | ME |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 04660 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 1501 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 1502 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | true |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 505224 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 51522 |
| IRS990/CYOtherExpensesAmt | 0 | 212957 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 5243 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 63281 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 285751 |
| IRS990/CYTotalExpensesAmt | 0 | 498708 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 44695 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 561989 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 11546 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 11546 |
| IRS990/Desc | 0 | WE ENVISION AN ISLAND-WIDE COMMUNITY WORKING TOGETHER TO PROMOTE APPRECIATAION OF THE HISTORIES OF MOUNT DESERT ISLAND. WE VALUE RESEARCH AND EDUCATION IN HISTORY, CONNECTION WITH LARGER WORLD SCHOLARS, FREE ACCESS TO OPPORTUNITIES FOR HISTORICAL ENGAGEMENT, COLLABORATION AMONG INSTITUTIONS AND INDIVIDUALS, SHARING RESOURCES TO ACHIEVE COMMON GOALS, RESPECT FOR THE DIGNITY OF CULTURE AND TRADITIONS, AND CREATIVE APPROACHES TO HISTORICAL ENGAGEMENT. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 474999 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 446609 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | true |
| IRS990/EmployeeCnt | 0 | 5 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 296788 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 1245 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 1245 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 4667 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 4667 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 9855 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 9855 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 0.50 |
| 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/IndividualTrusteeOrDirectorInd | 16 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 17 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 7 | 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/PersonNm | 0 | BOB BELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | PHAMILTON CLARK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | DRU COLBERT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | ANNA DURAND |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JOHNNY HASS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | WILLIAM HORNER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | OKA HUTCHINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | KARL KUSSEROW |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ROBIN LAWTON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | DURLIN LUNT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | DAVID MACDONALD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | MICHAEL PANCOE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | BENJAMIN PIERCE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | VASSAR PIERCE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | BONNY ROGERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | RICK WHEELER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | JOHN WILSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | JONATHAN WINTHROP |
| 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/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/TitleTxt | 0 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | VICE PRESIDE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | BOARD MEMBER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1931 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 44556 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 482 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 18 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 44556 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 1723 |
| IRS990/GrossReceiptsAmt | 0 | 563230 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 18 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 1 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 521 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 6915 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 7436 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 6484 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 6484 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 73689 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 79579 |
| IRS990/IRPDocumentCnt | 0 | 12 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 313648 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 171039 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 170009 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 483657 |
| IRS990/LegalDomicileStateCd | 0 | ME |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 1241 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 442783 |
| IRS990/MembersOrStockholdersInd | 0 | true |
| IRS990/MethodOfAccountingCashInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | THE MISSION OF THE MOUNT DESERT ISLAND HISTORICAL SOCIETY IS TO FOSTER MEANINGFUL ENGAGEMENT WITH THE HISTORIES OF MOUNT DESERT ISLAND |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 810338 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 882121 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 45038 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 45038 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -10528 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 335339 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 435512 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 5290 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 47606 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 52896 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 13492 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 25615 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 39107 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 474999 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 500247 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 19030 |
| IRS990/OtherExpensesGrp/Desc | 0 | PROGRAMS |
| IRS990/OtherExpensesGrp/Desc | 1 | COLLECTIONS/EXHIBITS |
| IRS990/OtherExpensesGrp/Desc | 2 | MEMBERSHIP EXPENSE |
| IRS990/OtherExpensesGrp/Desc | 3 | PROFESSIONAL DEVELOPMENT |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 59847 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 9597 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 9421 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 4874 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 59847 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 9597 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 9421 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 4874 |
| IRS990/OtherInd | 0 | X |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 41520 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 113478 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 110456 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 265454 |
| IRS990/OtherWebsiteInd | 0 | X |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 3175 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 8677 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 8445 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 20297 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | RANEY BENCH |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | MISC |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | BEAN SUPPER |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 0 | 3903 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 1340 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 3903 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 1340 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 329043 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 1170 |
| IRS990/PYOtherExpensesAmt | 0 | 141303 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 8671 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -10900 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 208481 |
| IRS990/PYTotalExpensesAmt | 0 | 349784 |
| IRS990/PYTotalRevenueAmt | 0 | 338884 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 63281 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | true |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | true |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 89110 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 130784 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt | 0 | 505224 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt | 0 | 329043 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 281200 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 131997 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 324131 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt | 0 | 1571595 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearAmt | 0 | 6484 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus1YearAmt | 0 | 2041 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 1256 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 503 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 3564 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/TotalAmt | 0 | 13848 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearAmt | 0 | 1340 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus2YearsAmt | 0 | 4287 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus3YearsAmt | 0 | 10126 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus4YearsAmt | 0 | 372 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/TotalAmt | 0 | 16125 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearAmt | 0 | 3903 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus1YearAmt | 0 | 8671 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus2YearsAmt | 0 | 5489 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus3YearsAmt | 0 | 2019 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/CurrentTaxYearMinus4YearsAmt | 0 | 2324 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/TotalAmt | 0 | 22406 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearAmt | 0 | 6484 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus1YearAmt | 0 | 2041 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus2YearsAmt | 0 | 1256 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus3YearsAmt | 0 | 503 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus4YearsAmt | 0 | 3564 |
| IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/TotalAmt | 0 | 13848 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0.01000 |
| IRS990ScheduleA/InvestmentIncomePYPct | 0 | 0.01000 |
| IRS990ScheduleA/PubliclySupportedOrg509a2Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 0.99150 |
| IRS990ScheduleA/PublicSupportPY509Pct | 0 | 0.99170 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 1610126 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind | 0 | X |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearAmt | 0 | 510467 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt | 0 | 337714 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 290976 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 144142 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 326827 |
| IRS990ScheduleA/Total509Grp/TotalAmt | 0 | 1610126 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearAmt | 0 | 516951 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus1YearAmt | 0 | 339755 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus2YearsAmt | 0 | 292232 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus3YearsAmt | 0 | 144645 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus4YearsAmt | 0 | 330391 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/TotalAmt | 0 | 1623974 |
| 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 | true |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 161215 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 223738 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 384953 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 69632 |
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