| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | UNDERGRADUATE CHAPTER OF A NATIONAL COLLEGIATE SOCIAL FRATERNITY. |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | false |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | GRANT OSBERG |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2063644293 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | PO BOX 301 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | EDMONDS |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | WA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 98020 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 97173 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 200042 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | false |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 7403 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 0 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 0 |
| IRS990/CYOtherExpensesAmt | 0 | 591597 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 778102 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 102869 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 83636 |
| IRS990/CYTotalExpensesAmt | 0 | 675233 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 778102 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/Desc | 0 | TO PROVIDE HOUSING, MEALS AND CHAPTER PROGRAMMING TO MEMBERS OF A LOCAL CHAPTER OF A COLLEGIATE SOCIAL FRATERNITY. |
| IRS990/DescribedInSection501c3Ind | 0 | false |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 1 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 7684 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | 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 | 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/PersonNm | 0 | GRANT OSBERG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | PRESTON BALL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | THOMAS LOFTIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JACK MURPHY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | ETHAN STAATS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | ALBAN VUKAJ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | OLIVER WATKINS |
| 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/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/TitleTxt | 0 | ALUMNI ADVIS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | VICE PRESIDE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | HOUSE MANAGE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | RISK MANAGER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 2014 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 6 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 778102 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InitiationFeesAndCapContriAmt | 0 | 10850 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | WA |
| IRS990/LoanOutstandingInd | 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 | MAINTAIN THE HIGH IDEALS AND STANDARDS OF THE ALPHA DELTA PHI FRATERNITY. MANY HANDS, ONE HEART. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 97173 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 200042 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/TotalAmt | 0 | 281016 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 23865 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501cInd | 0 | X |
| IRS990/OrgDoesNotFollowFASB117Ind | 0 | X |
| IRS990/OtherExpensesGrp/Desc | 0 | KITCHEN EXPENSE |
| IRS990/OtherExpensesGrp/Desc | 1 | CHAPTER OPERATIONS |
| IRS990/OtherExpensesGrp/Desc | 2 | CHAPTER DUES |
| IRS990/OtherExpensesGrp/Desc | 3 | PHILANTHROPY |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 155830 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 86789 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 27110 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 170 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 62386 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 21250 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrincipalOfficerNm | 0 | PRESTON BALL |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | MEMBERSHIP DUES |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 778102 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 778102 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYOtherExpensesAmt | 0 | 558336 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 627297 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -12675 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 81636 |
| IRS990/PYTotalExpensesAmt | 0 | 639972 |
| IRS990/PYTotalRevenueAmt | 0 | 627297 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 102869 |
| IRS990/RegularMonitoringEnfrcInd | 0 | false |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | false |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 97173 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 200042 |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE ORGANIZATION'S FORM 990 IS PREPARED BY AN ACCOUNTING SERVICE EXPERIENCED IN THE AREA OF NON-PROFIT TAXATION.THE BOARD MAKES A CURSORY REVIEW OF THE RETURN TO MAKE SURE NO MATERIAL OMISSIONS OR MISSTATEMENTS ARE MADE ON THE RETURN BEFORE IT IS FILED. ONCE APPROVED, THE RETURN IS SIGNED BY AN AUTHORIZED AGENT AND FILED. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | UPON REQUEST, WITHIN ONE WEEK OF REQUEST. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PAGE 6, PART VI, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PAGE 6, PART VI, LINE 19 |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | false |
| IRS990/SubjectToProxyTaxInd | 0 | false |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
| IRS990/TotalAssetsBOYAmt | 0 | 97173 |
| IRS990/TotalAssetsEOYAmt | 0 | 200042 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 97173 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 200042 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalEmployeeCnt | 0 | 1 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 675233 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 97173 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 200042 |
| IRS990/TotalProgramServiceRevenueAmt | 0 | 778102 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 778102 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 778102 |
| IRS990/TotalVolunteersCnt | 0 | 14 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 97173 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 200042 |
| IRS990/TravelGrp/TotalAmt | 0 | 1730 |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | PO BOX 301 |
| IRS990/USAddress/CityNm | 0 | EDMONDS |
| IRS990/USAddress/StateAbbreviationCd | 0 | WA |
| IRS990/USAddress/ZIPCd | 0 | 98020 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 6 |
| IRS990/VotingMembersIndependentCnt | 0 | 0 |
| IRS990/WebsiteAddressTxt | 0 | HTTP://ALPHADELT.ORG/ |
| IRS990/WhistleblowerPolicyInd | 0 | false |
| ReturnHeader/BuildTS | 0 | 2022-09-23 18:48:47Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | true |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | GRANT OSBERG |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | ALUMNI ADVISOR |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 2069486097 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2022-07-18 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | ALPHA DELTA PHI |
| ReturnHeader/Filer/BusinessName/BusinessNameLine2Txt | 0 | UNIVERSITY OF WASHINGTON |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | ALPH |
| ReturnHeader/Filer/EIN | 0 | 472057266 |
| ReturnHeader/Filer/PhoneNum | 0 | 2063644293 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | PO BOX 301 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | EDMONDS |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | WA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 98020 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | GREEK RESOURCE SERVICES LLC |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | PO BOX 1880 |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | TUSCALOOSA |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | AL |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 354031880 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 2057587754 |
| ReturnHeader/PreparerPersonGrp/PreparationDt | 0 | 2022-07-18 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | ELIZABETH BREWER |
| ReturnHeader/ReturnTs | 0 | 2022-07-18T16:09:45-05:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/SigningOfficerGrp/PersonFullName/PersonFirstNm | 0 | GRANT |
| ReturnHeader/SigningOfficerGrp/PersonFullName/PersonLastNm | 0 | OSBERG |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2021-07-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2022-06-30 |
| ReturnHeader/TaxYr | 0 | 2021 |