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| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
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| IRS990/BackupWthldComplianceInd | 0 | 1 |
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| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 80750 |
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| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 360 MONTAUK HIGHWAY |
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| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 11975 |
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| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
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| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | PETER JOYCE SR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | WILLIAM PITTS SR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JAMES GRIMES |
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| IRS990ScheduleD/OtherSecuritiesGrp/Desc | 2 | INVESTMENT - AMERIPRISE 1133 |
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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE MEMBERS ELECT THE GOVERNING BODY AND APPROVE SIGNIFICANT DECISIONS AT THE ANNUAL MEETING. MEMBERS HAVE THE RIGHT TO REDEEM THEIR SHARE OF THE BONDS THAT THE ASSOCIATION ISSUES TO ITS MEMBERS UPON THE MEMBERS RESIGNATION OR DEATH. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | SEE EXPLANATIONS FOR LINE 6. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | SEE EXPLANATIONS FOR LINE 6. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | THE TREASURER REVIEWS AND APPROVES THE TAX RETURN PRIOR TO SIGNING BY COMPARING THE AMOUNTS ON THE TAX RETURN TO THOSE RECORDED IN ITS BOOKS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | COPIES OF THE ORGANIZATIONS GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE AVAILABLE TO THE PUBLIC UPON REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION A, LINE 6 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION A, LINE 7A |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | FORM 990, PART VI, SECTION A, LINE 7B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | FORM 990, PART VI, SECTION C, LINE 19 |
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| IRS990/UnrestrictedNetAssetsGrp/EOYAmt | 0 | 11889 |
| IRS990/UponRequestInd | 0 | X |
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| IRS990/USAddress/CityNm | 0 | MONTAUK |
| IRS990/USAddress/StateAbbreviationCd | 0 | NY |
| IRS990/USAddress/ZIPCd | 0 | 11954 |
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| IRS990/VotingMembersIndependentCnt | 0 | 9 |
| IRS990/WebsiteAddressTxt | 0 | N/A |
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| ReturnHeader/BuildTS | 0 | 2019-02-21 02:37:17Z |
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| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | NY |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 11954 |
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| ReturnHeader/FilingSecurityInformation/FilingLicenseTypeCd | 0 | P |
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| ReturnHeader/FilingSecurityInformation/IPDt | 0 | 2019-02-19 |
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| ReturnHeader/FilingSecurityInformation/IPTm | 0 | 16:37:19 |
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| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | BRIDGEHAMPTON |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | NY |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 119320853 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 6315372300 |
| ReturnHeader/PreparerPersonGrp/PreparationDt | 0 | 2019-02-19 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | JOSEPH R MAMMINA JR CPA |
| ReturnHeader/ReturnTs | 0 | 2019-02-19T15:38:22-06:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2017-10-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2018-09-30 |
| ReturnHeader/TaxYr | 0 | 2017 |