Liabilities / Assets
33rd percentile
Higher debt load relative to assets than 33% of similar nonprofits.
Old Westbury Gardens Inc
EIN 11-1902968 • 501(c)3 • Old Westbury, NY
Profile
To inspire appreciation and knowledge of the early 20th century American country estate.
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.08x
Liabilities / Revenue
70th percentile
Higher debt load relative to revenue than 70% of similar nonprofits.
Net Margin
11th percentile
Higher net margin than 11% of similar nonprofits.
Top Officer Pay
31st percentile
Higher top officer pay than 31% of similar nonprofits.
Top officer pay equals 3.5% of source-year revenue.
Asset Growth
18th percentile
Faster asset growth than 18% of similar nonprofits.
Revenue Growth
43rd percentile
Faster revenue growth than 43% of similar nonprofits.
Balance Sheet
Assets
Down$37,657,421
Down $1,271,343 (-3.3%) from 2024
Liabilities
Up$3,109,241
Up $147,989 (+5.0%) from 2024
Net Assets
Down$34,548,180
Down $1,419,332 (-3.9%) from 2024
Revenue
Up$5,029,694
Up $215,335 (+4.5%) from 2024
Expenses
Up$6,041,814
Up $1,065,667 (+21%) from 2024
Net Income
Down-$1,012,120
Down $850,332 (-526%) from 2024
Trend Graphs
Filings
Most recent year
2025 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
- Assets
- $37,657,421
- Liabilities
- $3,109,241
- Net assets
- $34,548,180
- Revenue
- $5,029,694
- Expenses
- $6,041,814
- Net income
- -$1,012,120
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Apr 1, 2024 to Mar 31, 2025
- Signed
- Sep 30, 2025
- Return Version
- 2024v5.2
- Gross Receipts
- $6,938,357
Mission and Program Overview
Mission
OWG seeks to inspire appreciation & knowledge of the best qualities of the early 20th century American Country estate.
To inspire appreciation and knowledge of the early 20th century American country estate.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments Other Securities | $20,817,296 | $20,668,952 | ▼ $148,344 |
| Land, Buildings, and Equipment, Net | $10,738,152 | $10,830,983 | ▲ $92,831 |
| Investments in Publicly Traded Securities | $6,399,341 | $5,444,693 | ▼ $954,648 |
| Loans From Officers Directors | $1,700,000 | $1,600,000 | ▼ $100,000 |
| Cash and Non-Interest-Bearing Accounts | $365,062 | $202,737 | ▼ $162,325 |
| Prepaid Expenses and Deferred Charges | $119,294 | $198,370 | ▲ $79,076 |
| Inventories for Sale or Use | $154,519 | $143,450 | ▼ $11,069 |
| Pledges and Grants Receivable | $210,193 | $87,695 | ▼ $122,498 |
| Accounts Receivable | $32,924 | $14,717 | ▼ $18,207 |
| Savings and Temporary Cash Investments | - | $0 | - |
| Other Notes and Loans Receivable, Net | - | $0 | - |
| Receivable From Disqualified Prsn | - | $0 | - |
| Receivables From Officers Etc | - | $0 | - |
| Investments Program Related | - | $0 | - |
| Intangible Assets | - | $0 | - |
| Total Assets | $38,928,764 | $37,657,421 | ▼ $1,271,343 |
| Other Assets Total | $91,983 | $65,824 | ▼ $26,159 |
| Liabilities | |||
| Other Liabilities | $116,687 | $554,154 | ▲ $437,467 |
| Accounts Payable and Accrued Expenses | $299,941 | $383,460 | ▲ $83,519 |
| Unsecured Notes Loans Payable | $469,572 | $319,781 | ▼ $149,791 |
| Deferred Revenue | $375,052 | $251,846 | ▼ $123,206 |
| Total Liabilities | $2,961,252 | $3,109,241 | ▲ $147,989 |
| Net Assets / Fund Balance | |||
| Net Assets With Donor Restrictions | $25,741,001 | $25,270,201 | ▼ $470,800 |
| Net Assets Without Donor Restrictions | $10,226,511 | $9,277,979 | ▼ $948,532 |
| Total Net Assets Fund Balance | $35,967,512 | $34,548,180 | ▼ $1,419,332 |
| Total Liabilities and Net Assets / Fund Balance | $38,928,764 | $37,657,421 | ▼ $1,271,343 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $3,312,838 | $5,993,369 | $9,306,207 |
| Other Land Buildings | $5,255,766 | $331,768 | $5,587,534 |
| Land | $2,250,000 | - | $2,250,000 |
| Equipment | $12,379 | $359,837 | $372,216 |
Endowment Activity
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2025 | $3,231,391 | - | ▲ $53,599 | $25,000 | $3,259,990 |
| 2024 | $3,028,372 | - | ▲ $228,019 | $25,000 | $3,231,391 |
| 2023 | $3,141,177 | - | ▼ $87,805 | $25,000 | $3,028,372 |
| 2022 | $3,133,395 | - | ▲ $57,782 | $50,000 | $3,141,177 |
| 2021 | $2,723,700 | - | ▲ $502,156 | $92,461 | $3,133,395 |
Compensation and Service Providers
Employees
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Maura Brush | President/CEO | FT | $155,010 | $20,934 | $175,944 |
| Daniel Albanese | CFO | FT | $127,202 | $3,862 | $131,064 |
Board Members and Trustees
| Name | Title |
|---|---|
| Carol E Large | Chairman |
| Laureen Stanton Knutsen | Vice-Chairman |
| Anne B Byers | Trustee |
| Arthur Levine | Trustee |
| Dita Amory Nickson | Trustee |
| Frederic Bancroft | Trustee |
| Jacques Busquet | Trustee |
| Jeffrey SPhipps | Trustee |
| John S Cochran | Trustee |
| Lieta Urry | Trustee |
| Lloyd P Zuckerberg | Trustee |
| Michelle Gokey | Trustee |
| Nathan Urbach | Trustee |
| Peter P Mackinnon | Trustee |
| Robert F Hussey | Trustee |
| Robert M Johnston | Trustee |
| Robert S Lemle | Trustee |
| Thammanoune Kannalikham | Trustee |
| Jack Foley | Secretary |
| John M Deignan | Treasurer |
Highest Paid Contractors
| Contractor | Services | Location | Compensation |
|---|---|---|---|
| Henry Restoration Ltd | Contracting | 120 Lake Avenue, Nesconset, NY 11767 | $388,751 |
| Servpro Restoration of New Hyde Park | Restoration services | 87-17 97th Avenue, Ozone Park, NY 11416 | $142,647 |
| Sterling Affair | Caterer | 100 Commerce Road, Carlstadt, NJ 07072 | $139,382 |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $3,089,029
- Program Service Revenue
- $1,413,761
- Investment Income
- $507,650
- Other Revenue
- $19,254
- All Other Contributions
- $994,207
- Change in Net Assets
- $-1,012,120
Audited Revenue Reconciliation
- Revenue per Audited Statements
- $4,844,251
- Revenue Not Reported on Financial Statements
- $185,443
- Revenue Not Reported on Form 990
- $-212,809
- Other Revenue Adjustments
- $148,344
- Total Revenue per Audited Statements
- $4,631,442
- Total Revenue per Form 990
- $5,029,694
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Other Expenses | $3,129,914 |
| Salaries, Compensation, and Employee Benefits | $2,911,900 |
| Total Fundraising Expense | $902,937 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $1,663,193 | $187,121 | $299,693 | $2,150,007 |
| Insurance | $455,314 | $52,411 | $79,478 | $587,203 |
| All Other Expenses | $410,243 | $121,502 | $51,422 | $583,167 |
| Depreciation Depletion | $280,103 | $30,964 | $50,094 | $361,161 |
| Current Officers, Directors, Trustees, and Key Employees | $241,509 | $27,172 | $43,518 | $312,199 |
| Other Employee Benefits | $156,876 | $17,650 | $28,268 | $202,794 |
| Other Expenses | $176,870 | $15,599 | $504 | $192,973 |
| Payroll Taxes | $129,873 | $14,696 | $24,560 | $169,129 |
| Interest | - | $146,431 | - | $146,431 |
| Office Expenses | $85,789 | $7,727 | $31,690 | $125,206 |
| Pension Plan Contributions | $60,161 | $6,769 | $10,841 | $77,771 |
| Advertising | $50,582 | - | - | $50,582 |
| Total Functional Expenses | $4,484,455 | $654,422 | $902,937 | $6,041,814 |
Audited Expense Reconciliation
| Line Item | Amount |
|---|---|
| Total Expenses per Audited Statements | $6,050,774 |
| Total Expenses per Form 990 | $6,041,814 |
| Expenses per Audited Statements | $6,004,715 |
| Expenses Not Reported on Form 990 | $46,059 |
| Expenses Not Reported on Financial Statements | $37,099 |
Fundraising, Events, and Gaming
- Fundraising activities
- Yes
- Gaming activities
- No
- Professional fundraiser used
- No
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Fundraising Direct Expenses | $191,633 |
| Fundraising Gross Income | $162,280 |
| Professional Fundraising Fees | $0 |
Fundraising Events
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| December Dinner | $269,000 | $96,450 | $61,940 | $34,510 |
| Gardens Fair | $388,947 | $58,450 | $100,793 | $-42,343 |
| Total Events | $728,501 | $162,280 | $191,633 | $-29,353 |
Political and Lobbying Activity
- Political campaign activity
- No
- Lobbying activity
- No
- Subject to proxy tax
- No
Insider Transactions and Loans
Loans and Receivables
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Loans from Officers, Directors, Trustees, and Key Employees | $1,700,000 | $1,600,000 | ▼ $100,000 |
| Receivables from Disqualified Persons | - | $0 | - |
| Receivables from Officers, Directors, Trustees, and Key Employees | - | $0 | - |
Debt and Bond Financing
Other Reported Liabilities
| Liability | Amount |
|---|---|
| Commercial loan payable | $480,195 |
| Lease liabilities | $70,806 |
| PPP loan | $3,153 |
Governance and Compliance
Governance Checklist
- Compiled or reviewed by an accountant
- No
- Annual disclosure for covered persons
- Yes
- Audit committee
- Yes
- Backup withholding compliance
- Yes
- Business relationship with 35% controlled entity
- No
- Business relationship with family members
- No
- Business relationship with organization members
- No
- Material changes to governing documents
- No
- Compensation from other sources disclosed
- No
- CEO compensation reviewed
- Yes
- Other officer compensation reviewed
- Yes
- Conflict-of-interest policy
- Yes
- Audited financial statements prepared
- No
- Key decisions subject to board approval
- No
- Management duties delegated
- No
Governance Explanations
Form 990, Part VI, Section B, Line 11B
“The form 990 is prepared by an independent CPA firm. It is reviewed in detail and approved by the President & CEO, the CFO and members of the finance and audit committee. Following review, revision, and aproval by the finance and audit committee, a copy of the form 990 is presented to the board prior to filing.”
Form 990, Part VI, Section B, Line 12C
“Officers, directors and key employees sign a conflict of interest statement annually. The Director of finance is charged with reviewing the signed statements and ensuring compliance with the conflict of interest policy. Should any potential conflicts of interest be disclosed, the board member or officer would be asked to refrain from participation in any decision with regard to matters affected by the relationship.”
Form 990, Part VI, Section B, Line 15A
“Compensation for the President is reviewed and approved annually by the finance/audit committee.Comparability data such as the Form 990 from other organizations and compensation surveys are used in the analysis. The Sub-committee documents its deliberation process and decision in the committee minutes.”
Form 990, Part VI, Section B, Line 15B
“The same process as described above is used for all other officers of the organization.”
Form 990, Part VI, Section C, Line 19
“The Organization's governing documents, conflict of interest policy, and financial statements are made available to the public upon request.”
Filing and Contact Details
Filer
- Filer Name
- Old Westbury Gardens Inc
- EIN
- 11-1902968
- Phone
- 5163330048
- Address
- PO Box 430, Old Westbury, NY 11568
Signing Officer
- Name
- Daniel Albanese
- Title
- CFO
- Signed
- 2025-09-30
- Discuss with paid preparer
- Yes
Organization Details
- Formed
- 1958
- Legal Domicile
- Ny
- Voting Board Members
- 21
- Independent Board Members
- 21
- Employees
- 91
- Volunteers
- 60
Preparer
- Firm
- Satty Levine & Ciacco CPAs PC
- Address
- 534 Broadhollow Road Suite 300, Melville, NY 11747
- Preparer
- Frank Lou CPA
- Phone
- 5163389500
Supplemental Narrative
Additional Explanations
Form 990, Part XI, Line 9
“Change in beneficial trust = -$148344”
Financial Statement Notes
Part II, Line 9: Organization Reporting of conservation easements.
“The conservation easements consist of development rights purchased by Nassau County through a bond act reserved for open space preservation.”
Part III, Line 1A: If organization elected under SFAS 116 to not report are, historical treasures, O
“Collection items consist of furniture and works of art that are held for educational and preservation purposes. In conformity with the practice followed by museums, collections, such as art objects and furniture acquired and donated to the Gardens, are not included in the statements of financial position. Purchases of collection items are recorded as decreases in net assets without donor restrictions in the year in which the items are acquired or as net assets with donor restrictions if the assets used to purchase the items are restricted by donors. Contributed collection items are not reflected in the financial statements. Proceeds from sales or insurance revenues are reflected as increases in the appropriate net asset classes. There were no purchases or sales of collection items for the year ended March 31, 2024.”
Part III, Line 4: Description of organization'S collections and how it furthers its purpose.
“Westbury House retains furniture and works of art collected by JS Phipps and his wife Margarita over a period of 40 years. The interiors and furnishings not only exemplify the taste of the family but also popular trends in collecting between 1900 to 1940. Visitors experience fine Georgian furniture and English and Continental paintings from the 1820's through the mid-twentieth century in the same setting enjoyed by Mr. and Mrs. Phipps.”
Part V, Line 4: Intended uses of the endowment fund.
“General Purpose Endowment:The investment income from the general purpose Endowment is placed into a time restricted fund and annually,Approximately 3-5% of the tax basis of the endowment is taken from the time restricted fund to support the operating budget. Dianne Wittlinger Tree Fund Endowment:The investment income from the Dianna Wittlinger Tree Fund Endowment is placed into a donor restricted fund, and these funds can be released for specific projects relating to the green architecture of Old Westbury Gardens by the Board of Trustees.Education and Outreach Endowment:The investment income from the Education and Outreach Endowment is placed into a donor restricted fund, and these funds can be released for specific projects relating to the environmental education projects of Old Westbury Gardens by the Board of Trustees.”
Part XI, Line 2D: Other revenue amounts included in F/S but not included on form 990
“Rental exp. reported on Part VIII line 6 $46059”
Part XI, Line 4B: Other revenue amounts included on 990 but not included in F/S
“Change in beneficial trust $148344”
Part XII, Line 2D: Other expenses and losses per audited F/S
“Rental exp. reported on Part VIII line 6 $46059”
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| IRS990/Desc | 0 | Gardens and Westbury House maintenance:OLD WESTBURY GARDENS IS ONE OF THE FEW REMAINING HISTORIC LONG ISLAND ESTATES OPEN TO THE PUBLIC AND ONE OF THE BEST PRESERVED OF ITS KIND IN AMERICA. PRESERVATION IS THE HIGHEST PRIORITY AND IN COORDINATION WITH THE BOARD OF TRUSTEES, COMMITTEES AND THE HORTICULTURE DEPARTMENT, THE GARDENS BUDGETS FOR CAPITAL PROJECTS AND THE PROTECTION AND RESTORATION OF THE LANDSCAPE, BUILDINGS AND HARDSCAPE. THE HORTICULTURE DEPARTMENT CULTIVATES AND MANAGES MORE THAN 200 ACRES OF FORMAL GARDENS, WOODLANDS, AND LAKES, MAINTAINING THE EXACTING STANDARDS REQUIRED TO PRESERVE THE GARDENS AND CREATE AN EXTRAORDINARY VISITOR EXPERIENCE. THE OPERATIONS DEPARTMENT PROVIDES MAINTENANCE, REPAIRS, AND STENGTHENING OF THE INFRASTRUCTURE OF OLD WESTBURY GARDENS. |
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| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 10 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 11 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 12 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 13 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 14 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 15 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 16 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 17 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 18 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 19 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 20 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 21 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 1.00 |
| 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/IndividualTrusteeOrDirectorInd | 18 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 19 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 20 | 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/OtherCompensationAmt | 0 | 20934 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 3862 |
| 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/OtherCompensationAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | Maura Brush |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Daniel Albanese |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Carol E Large |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Laureen Stanton Knutsen |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | John M Deignan |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Jack Foley |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Lieta Urry |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | John S Cochran |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | Michelle Gokey |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | Anne B Byers |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | Jacques Busquet |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | Frederic Bancroft |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | Thammanoune Kannalikham |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | Arthur Levine |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | Peter P Mackinnon |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | Dita Amory Nickson |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | Jeffrey SPhipps |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | Lloyd P Zuckerberg |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | Robert S Lemle |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | Robert M Johnston |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | Robert F Hussey |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | Nathan Urbach |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 155010 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 127202 |
| 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/ReportableCompFromOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 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/ReportableCompFromRltdOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | President/CEO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | CFO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Chairman |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | Vice-Chairman |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | Secretary |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | Trustee |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | Trustee |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1958 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingAmt | 0 | 566221 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 191633 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 162280 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 389127 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 21 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 2001391 |
| IRS990/GrossReceiptsAmt | 0 | 6938357 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 46950 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 69541 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 21 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 0 |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 79478 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 52411 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 455314 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 587203 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 146431 |
| IRS990/InterestGrp/TotalAmt | 0 | 146431 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 154519 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 143450 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 118523 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 118523 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 20817296 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 20668952 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 6399341 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 5444693 |
| IRS990/IRPDocumentCnt | 0 | 70 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 6684974 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 10738152 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 10830983 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 17515957 |
| IRS990/LegalDomicileStateCd | 0 | NY |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 1612264 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 46059 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LoansFromOfficersDirectorsGrp/BOYAmt | 0 | 1700000 |
| IRS990/LoansFromOfficersDirectorsGrp/EOYAmt | 0 | 1600000 |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 328601 |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | To inspire appreciation and knowledge of the early 20th century American country estate. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 35967512 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 34548180 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 389127 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 389127 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | -29353 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | -29353 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/ExclusionAmt | 0 | 10834 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 10834 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 891 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 891 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -258868 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 10226511 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 9277979 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/TotalAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 31690 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 7727 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 85789 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 125206 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 91983 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 65824 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | -148344 |
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