Liabilities / Assets
28th percentile
Higher debt load relative to assets than 28% of similar nonprofits.
EIN 04-3174933 • 501(c)3 • Boston, MA
Profile
The mission of the boston celtics shamrock foundation is to extend the reach of the cetics legacy into our community. The shamrock foundation benefits children directly through programs that provide education and support along with partnerships and community service organizations
Refreshing map…
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
28th percentile
Higher debt load relative to assets than 28% of similar nonprofits.
Liabilities / Revenue
25th percentile
Higher debt load relative to revenue than 25% of similar nonprofits.
Net Margin
86th percentile
Higher net margin than 86% of similar nonprofits.
Top Officer Pay
100th percentile
Higher top officer pay than 100% of similar nonprofits.
Top officer pay equals 179.2% of source-year revenue.
Asset Growth
86th percentile
Faster asset growth than 86% of similar nonprofits.
Revenue Growth
70th percentile
Faster revenue growth than 70% of similar nonprofits.
Assets
Up$8,238,847
Up $1,921,734 (+30%) from 2023
Liabilities
Down$210,927
Down $182,825 (-46%) from 2023
Net Assets
Up$8,027,920
Up $2,104,559 (+36%) from 2023
Revenue
Up$5,102,397
Up $844,588 (+20%) from 2023
Expenses
Down$2,997,838
Down $239,801 (-7.4%) from 2023
Net Income
Up$2,104,559
Up $1,084,389 (+106%) 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.
The mission of the boston celtics shamrock foundation is to extend the reach of the cetics legacy into our community. The shamrock foundation benefits children directly through programs that provide education and support along with partnerships and community service organizations
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Cash and Non-Interest-Bearing Accounts | $4,886,582 | $6,253,697 | ▲ $1,367,115 |
| Prepaid Expenses and Deferred Charges | $25,000 | $13,462 | ▼ $11,538 |
| Savings and Temporary Cash Investments | - | $0 | - |
| Accounts Receivable | - | $0 | - |
| Other Notes and Loans Receivable, Net | - | $0 | - |
| Pledges and Grants Receivable | - | $0 | - |
| Receivable From Disqualified Prsn | - | $0 | - |
| Receivables From Officers Etc | - | $0 | - |
| Investments Other Securities | - | $0 | - |
| Investments Program Related | - | $0 | - |
| Investments in Publicly Traded Securities | - | $0 | - |
| Land, Buildings, and Equipment, Net | - | $0 | - |
| Intangible Assets | - | $0 | - |
| Inventories for Sale or Use | - | $0 | - |
| Total Assets | $4,998,285 | $6,317,113 | ▲ $1,318,828 |
| Other Assets Total | $86,703 | $49,954 | ▼ $36,749 |
| Liabilities | |||
| Accounts Payable and Accrued Expenses | $94,485 | $362,738 | ▲ $268,253 |
| Other Liabilities | $609 | $31,014 | ▲ $30,405 |
| Total Liabilities | $95,094 | $393,752 | ▲ $298,658 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $4,903,191 | $5,923,361 | ▲ $1,020,170 |
| Total Net Assets Fund Balance | $4,903,191 | $5,923,361 | ▲ $1,020,170 |
| Total Liabilities and Net Assets / Fund Balance | $4,998,285 | $6,317,113 | ▲ $1,318,828 |
| Name | Title |
|---|---|
| Stephen Pagliuca | President & Director |
| Domenic Ferrante | Director |
| Glenn Hutchins | Director |
| H Irving Grousbeck | Director |
| Paul Edgerley | Director |
| Robert Epstein | Director |
| Wycliffe K Grousbeck | Director & CEO |
| Richard Gotham | Exec. Clerk |
| William Reissfelder | Treasurer |
| Contribution Type | Reported Amount | Valuation Method |
|---|---|---|
| Other Non Cash Contri Table | $210,297 | Fair Market Value (FMV) |
| Total Noncash Contributions | $210,297 | - |
| Line Item | Amount |
|---|---|
| Grants and Similar Amounts Paid | $2,023,479 |
| Other Expenses | $1,214,160 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Grants to Domestic Orgs | $2,023,479 | - | - | $2,023,479 |
| Fees for Services Management | - | $100,000 | - | $100,000 |
| Advertising | $71,730 | - | - | $71,730 |
| Other Expenses | $50,085 | - | - | $50,085 |
| Office Expenses | - | $24,584 | - | $24,584 |
| All Other Expenses | $16,869 | - | - | $16,869 |
| Total Functional Expenses | $3,113,055 | $124,584 | $0 | $3,237,639 |
| Line Item | Amount |
|---|---|
| Total Expenses per Audited Statements | $4,287,280 |
| Expenses per Audited Statements | $3,237,639 |
| Total Expenses per Form 990 | $3,237,639 |
| Expenses Not Reported on Form 990 | $1,049,641 |
| Recipient | Location | Category | Purpose | Amount |
|---|---|---|---|---|
| NBA Foundation | New York, NY | - | Support | $500,000 |
| Kipp Academy Lynn Collegiate | Lynn, MA | - | Support | $123,000 |
| Project 351 | Boston, MA | - | Support | $100,000 |
| Berklee College of Music | Boston, MA | - | Support | $50,000 |
| Boston Bruins Foundation | Braintree, MA | - | Support | $50,000 |
| Boston Childrens Hospital | Boston, MA | - | Support | $50,000 |
| Boys and Girls Clubs of Bosto | Boston, MA | - | Support | $50,000 |
| Horizons for Homeless Childre | Boston, MA | - | Support | $50,000 |
| Lewiston Auburn Metropolitan | Lewiston, ME | - | Support | $50,000 |
| Massachusetts Society for the | Boston, MA | - | Support | $50,000 |
| New England Civil Rights Fund | Boston, MA | - | Support | $50,000 |
| Perkins School for the Blind | Watertown, MA | - | Support | $50,000 |
| The New England Patriots Foun | Foxborough, MA | - | Support | $50,000 |
| YMCA of Greater Boston | Boston, MA | - | Support | $40,000 |
| Dana Farber Cancer Institute | Boston, MA | - | Support | $35,000 |
| Boch Center for Perform Arts | Boston, MA | - | Support | $25,000 |
| Chuck Cooper Foundation | Pittsburgh, PA | - | Support | $25,000 |
| New England Baptist Hospital | Boston, MA | - | Support | $25,000 |
| Positive Coaching Alliance | Mountain View, CA | - | Support | $25,000 |
| The 3Point Foundation | Brighton, MA | - | Support | $25,000 |
| The Boston Foundation Inc | Boston, MA | - | Support | $25,000 |
| Best Buddies Massachusetts | Boston, MA | - | Support | $16,100 |
| Anti-Defamation League | New York, NY | - | Support | $15,000 |
| Louis D Brown Peace Institute | Boston, MA | - | Support | $15,000 |
| Roxbury Community College Fou | Roxbury Crossin, MA | - | Support | $15,000 |
| The Joy in Childhood Foundati | Canton, MA | - | Support | $15,000 |
| JetBlue Foundation | Long Island Cit, NY | - | Support | $13,500 |
| Swing for Good Inc | Long Island Cit, NY | - | Support | $13,500 |
| Make-A-Wish MA and RI | Boston, MA | - | Support | $12,000 |
| Boston Medical Center | Boston, MA | - | Support | $10,000 |
| Boston Neighborhood Basketbal | Boston, MA | - | Support | $10,000 |
| Grant Williams Family Foundat | Beverly Hills, CA | - | Support | $10,000 |
| Museum of African American Hi | Boston, MA | - | Support | $10,000 |
| West End House Boys & Girls C | Allston, MA | - | Support | $10,000 |
| The Sports Museum | Boston, MA | - | Support | $6,000 |
| Line Item | Amount |
|---|---|
| Fundraising Direct Expenses | $1,049,642 |
| Fundraising Gross Income | $138,910 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| In-Arena | $541,336 | - | $99,264 | - |
| Gala Dinner | $1,551,157 | $101,250 | $617,693 | $-516,443 |
| Total Events | $2,359,643 | $138,910 | $1,049,642 | $-910,732 |
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Receivables from Disqualified Persons | - | $0 | - |
| Receivables from Officers, Directors, Trustees, and Key Employees | - | $0 | - |
| Liability | Amount |
|---|---|
| Advance Event Contributions | $31,014 |
“A draft of form 990 was made available to all members of the foundation's governing body for their comments and inspection in advance of filing. Members are provided the choice to review the form 990 via email or paper copy.”
“No documents available to the public.”
“Other program services 4: other program services”
“Direct funding expenses $1049641”
“Direct funding expenses $1049641”
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/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 94485 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 362738 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | THE MISSION OF THE BOSTON CELTICS SHAMROCK FOUNDATION IS TO EXTEND THE REACH OF THE CETICS LEGACY INTO OUR COMMUNITY. THE SHAMROCK FOUNDATION BENEFITS CHILDREN DIRECTLY THROUGH PROGRAMS THAT PROVIDE EDUCATION AND SUPPORT ALONG WITH PARTNERSHIPS AND COMMUNITY SERVICE ORGANIZATIONS |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 71730 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 71730 |
| IRS990/AllOtherContributionsAmt | 0 | 2720830 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 16869 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 16869 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | William J Reissfelder |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6178548000 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 100 Causeway Street Suite 1210 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | Boston |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 02114 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 4886582 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 6253697 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 0 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContriRptFundraisingEventAmt | 0 | 2220733 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 5013293 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 2023479 |
| IRS990/CYInvestmentIncomeAmt | 0 | 155248 |
| IRS990/CYOtherExpensesAmt | 0 | 1214160 |
| IRS990/CYOtherRevenueAmt | 0 | -910732 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 1020170 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 3237639 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 4257809 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | true |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | true |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 0 |
| IRS990/Desc | 0 | OTHER PROGRAM SERVICES |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | true |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 2814159 |
| IRS990/FamilyOrBusinessRlnInd | 0 | true |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/ManagementAndGeneralAmt | 0 | 100000 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 100000 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282FiledCnt | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 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/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 30521 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 30521 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 33670 |
| 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/PersonNm | 0 | WYCLIFFE K GROUSBECK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | RICHARD GOTHAM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | WILLIAM REISSFELDER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | STEPHEN PAGLIUCA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | H IRVING GROUSBECK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | ROBERT EPSTEIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | PAUL EDGERLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | GLENN HUTCHINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | DOMENIC FERRANTE |
| 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/ReportableCompFromRltdOrgAmt | 0 | 7598899 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 3236810 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 1084434 |
| 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/TitleTxt | 0 | Director & CEO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Exec. Clerk |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | President & Dir |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Director |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1993 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingAmt | 0 | 2220733 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 1049642 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 138910 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 8 |
| IRS990/GovernmentGrantsAmt | 0 | 71730 |
| IRS990/GrantAmt | 0 | 2591490 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 2023479 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 2023479 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | true |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 5307451 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 0 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 0 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 0 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/TotalAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 155248 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 155248 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 30 |
| IRS990/IRPDocumentW2GCnt | 0 | 34 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | MA |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | THE MISSION OF THE BOSTON CELTICS SHAMROCK FOUNDATION IS TO EXTEND THE REACH OF THE CETICS LEGACY INTO OUR COMMUNITY. THE SHAMROCK FOUNDATION BENEFITS CHILDREN DIRECTLY THROUGH PROGRAMS THAT PROVIDE EDUCATION AND SUPPORT ALONG WITH PARTNERSHIPS AND COMMUNITY SERVICE ORGANIZATIONS |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 4903191 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 5923361 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | -910732 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 4903191 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 5923361 |
| IRS990/NoncashContributionsAmt | 0 | 210297 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/TotalAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 24584 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 24584 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 86703 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 49954 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | Celtics United |
| IRS990/OtherExpensesGrp/Desc | 1 | Misc. community initiatives |
| IRS990/OtherExpensesGrp/Desc | 2 | Toys and Photos Program |
| IRS990/OtherExpensesGrp/Desc | 3 | Facilities Renovation |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 802192 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 89577 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 59123 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 50085 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 802192 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 89577 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 59123 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 50085 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 609 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 31014 |
| IRS990/OtherRevenueTotalAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 0 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 25000 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 13462 |
| IRS990/PrincipalOfficerNm | 0 | STEPHEN PAGLIUCA |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | PROGRAM ALLOWS FOR SEASON TICKET HOLDERS OF THE BOSTON CELTICS TO DONATE THEIR TICKETS TO THE BOSTON CELTICS SHAMROCK FOUNDATION. THE BOSTON CELTICS SHAMROCK FOUNDATION ACKNOWLEDGES THE DONATED TICKETS AS DONATIONS RECEIVED AND TREATS THE DISTRIBUTION OF TICKETS AS EXPENSES. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 210297 |
| IRS990/ProgSrvcAccomActy2Grp/GrantAmt | 0 | 210297 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 210297 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | THE LICENSE PLATE PROGRAM WAS DESIGNED TO RAISE PROCEEDS AND AWARENESS OF CHILDREN'S HOSPITAL 0F BOSTON. INDIVIDUAL DONORS APPLY FOR BOSTON CELTICS/CHILDREN'S HOSPITAL CO-BRANDED MASSACHUSETTS LICENSE PLATES. A PORTION OF EACH LICENSE IS PAID BY THE MASSACHUSETTS REGISTRY OF MOTOR VEHICLES TO THE BOSTON CELTICS SHAMROCK FOUNDATION, WHICH IN TURN DONATES TO THE CHILDREN'S HOSPITAL OF BOSTON. |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 71730 |
| IRS990/ProgSrvcAccomActy3Grp/RevenueAmt | 0 | 71730 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 4608281 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 2974352 |
| IRS990/PYInvestmentIncomeAmt | 0 | 39835 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 556013 |
| IRS990/PYOtherRevenueAmt | 0 | -668459 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 449292 |
| IRS990/PYTotalExpensesAmt | 0 | 3530365 |
| IRS990/PYTotalRevenueAmt | 0 | 3979657 |
| IRS990/QuidProQuoContributionsInd | 0 | true |
| IRS990/QuidProQuoContriDisclInd | 0 | true |
| IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 1020170 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | true |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | false |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RoyaltiesGrp/TotalAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 0 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 5013293 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 4608281 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 2626524 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1319758 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 2416239 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 15984095 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 155248 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 40610 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 8371 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 32202 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 93484 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 329915 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 507714 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.95930 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.89680 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 15650535 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 333560 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 5013293 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 4608281 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 2626524 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1319758 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 2416239 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 15984095 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 16314010 |
| IRS990ScheduleA/UnrelatedBusinessNetIncm170Grp/TotalAmt | 0 | 0 |
| 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/ExpensesNotReportedAmt | 0 | 1049641 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 3237639 |
| IRS990ScheduleD/OtherExpensesIncludedAmt | 0 | 1049641 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 31014 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | ADVANCE EVENT CONTRIBUTIONS |
| IRS990ScheduleD/OtherRevenueAmt | 0 | 1049641 |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 1049641 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 4257809 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | Direct funding expenses $1049641 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | Direct funding expenses $1049641 |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Part XI, Line 2d: Other revenue amounts included in F/S but not included on form 990 |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Part XII, Line 2d: Other expenses and losses per audited F/S |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 3237639 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 31014 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 4257809 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 5307450 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 4287280 |
| IRS990ScheduleG/AgrmtProfFundraisingActyInd | 0 | false |
| IRS990ScheduleG/FundraisingEventInformationGrp/CashPrizesEvent2Amt | 0 | 188411 |
| IRS990ScheduleG/FundraisingEventInformationGrp/CashPrizesTotalEventsAmt | 0 | 188411 |
| IRS990ScheduleG/FundraisingEventInformationGrp/CharitableContributionsTotAmt | 0 | 2220733 |
| IRS990ScheduleG/FundraisingEventInformationGrp/CharitableContriEvent1Amt | 0 | 1449907 |
| IRS990ScheduleG/FundraisingEventInformationGrp/CharitableContriEvent2Amt | 0 | 541336 |
| IRS990ScheduleG/FundraisingEventInformationGrp/CharitableContriOtherEventsAmt | 0 | 229490 |
| IRS990ScheduleG/FundraisingEventInformationGrp/DirectExpenseSummaryEventsAmt | 0 | 1049642 |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event1Nm | 0 | Gala Dinner |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event2Nm | 0 | In-Arena |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent1Amt | 0 | 1551157 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent2Amt | 0 | 541336 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsOtherEventsAmt | 0 | 267150 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsTotalAmt | 0 | 2359643 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent1Amt | 0 | 101250 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueOtherEventsAmt | 0 | 37660 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueTotalEventsAmt | 0 | 138910 |
| IRS990ScheduleG/FundraisingEventInformationGrp/NetIncomeSummaryAmt | 0 | -910732 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssOtherEventsAmt | 0 | 144274 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OthDirectExpnssTotalEventsAmt | 0 | 861231 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherDirectExpensesEvent1Amt | 0 | 617693 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherDirectExpensesEvent2Amt | 0 | 99264 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherEventsTotalCnt | 0 | 1 |
| IRS990ScheduleI/GrantRecordsMaintainedInd | 0 | false |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 0 | 15000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 1 | 50000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 2 | 16100 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 3 | 25000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 4 | 50000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 5 | 50000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 6 | 10000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 7 | 10000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 8 | 50000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 9 | 25000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 10 | 35000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 11 | 10000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 12 | 50000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 13 | 13500 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 14 | 123000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 15 | 50000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 16 | 15000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 17 | 12000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 18 | 50000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 19 | 10000 |
| IRS990ScheduleI/RecipientTable/CashGrantAmt | 20 | 500000 |
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