| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 792057 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 987486 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 10218636 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 10659857 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | TO PROVIDE HEALTH AND WELFARE BENEFITS TO ELIGIBLE PARTICIPANTS, WHICH ELIGIBLE PARTICIPANTS, WHICH INCLUDE ACTIVE AND CASUAL EMPLOYEES OF PARTICIPATING EMPLOYERS AND ELIGIBLE RETIREES. |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 0 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/AuditCommitteeInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 135176590 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | GARTH FISHER |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 6264636041 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 225 S LAKE AVE STE 1200 |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | PASADENA |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 91101 |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CapStkTrPrinCurrentFundsGrp/BOYAmt | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/EOYAmt | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 4 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 0 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 54757 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 3770812 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 967431 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 164249 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 181201 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | 2323 EASTLAKE AVE E STE 400 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 11050 OLSON DR STE 110 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 225 SUMMIT AVE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | 650 California st 17th fl |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | SEATTLE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | RANCHO CORDOVA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | MONTVALE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | SAN FRANCISCO |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | WA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | NJ |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 98102 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 95670 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 07645 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 94108 |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 0 | NORTHWEST ADMINISTRATORS INC |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 1 | ANTHEM BLUE CROSS |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 2 | EXPRESS SCRIPTS INC |
| IRS990/ContractorCompensationGrp/ContractorName/PersonNm | 3 | Milliman |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | TPA, INV MGR, AUDIT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | ADMIN SERVICE ORG |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | RX BENEFIT ADMIN |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | consulting |
| IRS990/CostOfGoodsSoldAmt | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 135176590 |
| IRS990/CYContributionsGrantsAmt | 0 | 0 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 2620164 |
| IRS990/CYOtherExpensesAmt | 0 | 4615024 |
| IRS990/CYOtherRevenueAmt | 0 | 3169472 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 138280965 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 4278987 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/CYTotalExpensesAmt | 0 | 139791614 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 144070601 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 1666335 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 1302733 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 2996 |
| IRS990/Desc | 0 | TO PROVIDE HEALTH AND WELFARE BENEFITS TO ELIGIBLE PARTICIPANTS, WHICH INCLUDE ACTIVE AND CASUAL EMPLOYEES OF PARTICIPATING EMPLOYERS AND ELIGIBLE RETIREES. |
| IRS990/DescribedInSection501c3Ind | 0 | false |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EscrowAccountLiabilityGrp/BOYAmt | 0 | 0 |
| IRS990/EscrowAccountLiabilityGrp/EOYAmt | 0 | 0 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 231260 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 85057 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 3499328 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 199801 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 210151 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.0 |
| 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/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/PersonNm | 0 | JOHN COULSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | A J PHILLIPS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | WILLIAM R DAVIDSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | JUSTIN HOLLIDAY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | WALTER MAESTAS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | PATRICK D KELLY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | BOB PAFFENROTH |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | TOM WALTERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | MICHAEL SIMEONE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | DOUG RUYGROK |
| 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/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/TitleTxt | 0 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | false |
| IRS990/FormationYr | 0 | 1962 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | true |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/FundraisingDirectExpensesAmt | 0 | 0 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 28614 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GamingDirectExpensesAmt | 0 | 0 |
| IRS990/GamingGrossIncomeAmt | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 10 |
| IRS990/GrantsPayableGrp/BOYAmt | 0 | 0 |
| IRS990/GrantsPayableGrp/EOYAmt | 0 | 0 |
| 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 | 13860525 |
| IRS990/GrossReceiptsAmt | 0 | 157902512 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 0 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | true |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 0 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 0 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 34311 |
| IRS990/IntangibleAssetsGrp/BOYAmt | 0 | 0 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/TotalAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 2591550 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 2591550 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 53447911 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 53356556 |
| IRS990/InvestmentsProgramRelatedGrp/BOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 86141585 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 89558984 |
| IRS990/IRPDocumentCnt | 0 | 2926 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 16701 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 0 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 12415 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 29116 |
| IRS990/LegalDomicileStateCd | 0 | WA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 13831911 |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LoansFromOfficersDirectorsGrp/BOYAmt | 0 | 0 |
| IRS990/LoansFromOfficersDirectorsGrp/EOYAmt | 0 | 0 |
| 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 | TO PROVIDE HEALTH AND WELFARE BENEFITS TO ELIGIBLE PARTICIPANTS, WHICH INCLUDE ACTIVE AND CASUAL EMPLOYEES OF PARTICIPATING EMPLOYERS AND ELIGIBLE RETIREES. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 119295613 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 125206634 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 28614 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 28614 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 1632034 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/TotalAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 120028 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501cInd | 0 | X |
| IRS990/OrgDoesNotFollowSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 0 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | ACA REINSURANCE & PCORI FEES |
| IRS990/OtherExpensesGrp/Desc | 1 | MISCELLANEOUS EXPENSE |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 168969 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 8366 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 29204747 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 26664071 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 1 | 900099 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | REFUNDS AND REIMBURSEMENTS |
| IRS990/OtherRevenueMiscGrp/Desc | 1 | MISCELLANEOUS INCOME |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 3164784 |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 1 | 4688 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 3164784 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 1 | 4688 |
| IRS990/OtherRevenueTotalAmt | 0 | 3169472 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 0 |
| IRS990/OthNotesLoansReceivableNetGrp/BOYAmt | 0 | 0 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 0 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 30694 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 575 |
| IRS990/PrincipalOfficerNm | 0 | Bob Paffenroth |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 900099 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 900099 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | EMPLOYER CONTRIBUTIONS |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | RETIREE CONTRIBUTIONS |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | COBRA |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 121520361 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 16127685 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 632919 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 121520361 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 16127685 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 632919 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 138195985 |
| IRS990/PYContributionsGrantsAmt | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 3279079 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 4653312 |
| IRS990/PYOtherRevenueAmt | 0 | 5213701 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 132113760 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -2242757 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/PYTotalExpensesAmt | 0 | 142849297 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 140606540 |
| IRS990/RcvblFromDisqualifiedPrsnGrp/BOYAmt | 0 | 0 |
| IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt | 0 | 0 |
| IRS990/ReceivablesFromOfficersEtcGrp/BOYAmt | 0 | 0 |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 4278987 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | true |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/RentalIncomeOrLossGrp/PersonalAmt | 0 | 0 |
| IRS990/RentalIncomeOrLossGrp/RealAmt | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | true |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RoyaltiesGrp/TotalAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 119295613 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 125206634 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 1119926 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 572537 |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 12415 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 16701 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 29116 |
| IRS990ScheduleD/ExpensesNotRptFinclStmtAmt | 0 | -2540676 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 142332290 |
| IRS990ScheduleD/FederalIncomeTaxLiabilityAmt | 0 | 0 |
| IRS990ScheduleD/FootnoteTextInd | 0 | X |
| IRS990ScheduleD/NetUnrealizedGainsInvstAmt | 0 | 1632034 |
| IRS990ScheduleD/OtherExpensesNotIncludedAmt | 0 | -2540676 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 26664071 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | BENEFIT OBLIGATIONS |
| IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt | 0 | 27125565 |
| IRS990ScheduleD/OtherSecuritiesGrp/BookValueAmt | 1 | 26230991 |
| IRS990ScheduleD/OtherSecuritiesGrp/Desc | 0 | LIMITED PARTNERSHIP |
| IRS990ScheduleD/OtherSecuritiesGrp/Desc | 1 | COMMON/COLLECTIVE TRUST |
| IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd | 0 | F |
| IRS990ScheduleD/OtherSecuritiesGrp/MethodValuationCd | 1 | F |
| IRS990ScheduleD/RevenueNotReportedAmt | 0 | 1632034 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 144070601 |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 0 | Accounting principles generally accepted in the United States of America require management to evaluate tax positions taken by the trust and recognize a tax liability if the trust has taken a tax position that more likely than not would not be sustained upon examination by a tax authority. The trust is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress. |
| IRS990ScheduleD/SupplementalInformationDetail/ExplanationTxt | 1 | DECREASE IN BENEFIT OBLIGATIONS. |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART X, LINE 2: |
| IRS990ScheduleD/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | PART XII, LINE 4B: |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 12415 |
| IRS990ScheduleD/TotalBookValueSecuritiesAmt | 0 | 53356556 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 139791614 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 26664071 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 144070601 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 145702635 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 142332290 |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | THE ADMINISTRATIVE OFFICE REVIEWS THE FORM 990 AND WILL NOTIFY THE BOARD OF TRUSTEES IF ANY UNUSUAL OR SIGNIFICANT ITEMS ARE NOTED. PART VI, LINE 12C: THE TRUST HAS A CONFLICT OF INTEREST POLICY THAT REQUIRES ALL TRUSTEES AND SERVICE PROVIDERS TO CONTACT THE ADMINISTRATIVE OFFICE IF ANY ISSUES ARISE THAT COULD IMPAIR THEIR INDEPENDENCE. PART VI, LINE 19: THE TRUST'S GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY AND FINANCIAL STATEMENTS ARE MAINTAINED AT THE ADMINISTRATOR'S OFFICE AND ARE AVAILABLE UPON REQUEST. PART VII, SECTION A - COMPENSATION OF OFFICERS: THE BOARD OF TRUSTEES SERVE WITHOUT COMPENSATION. THE TRUST DOES NOT MAINTAIN THE INFORMATION ON COMPENSATION FROM RELATED ORGANIZATIONS BUT BELIEVES THAT SUCH COMPENSATION, IF ANY, IS APPROPRIATELY REPORTED ON THE RETURNS OF THOSE ORGANIZATIONS. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART VI, LINE 11B: |
| IRS990ScheduleR/AssetExchangeInd | 0 | false |
| IRS990ScheduleR/AssetPurchaseFromOtherOrgInd | 0 | false |
| IRS990ScheduleR/AssetSaleToOtherOrgInd | 0 | false |
| IRS990ScheduleR/DivRelatedOrganizationInd | 0 | false |
| IRS990ScheduleR/GiftGrntCapContriFromOthOrgInd | 0 | false |
| IRS990ScheduleR/GiftGrntOrCapContriToOthOrgInd | 0 | false |
| IRS990ScheduleR/IdRelatedOrgTxblCorpTrGrp/RelatedOrganizationName/BusinessNameLine1Txt | 0 | SEE PART VII - SUPPLEMENTAL INFORMATION |
| IRS990ScheduleR/IdRelatedOrgTxblPartnershipGrp/RelatedOrganizationName/BusinessNameLine1Txt | 0 | SEE PART VII - SUPP INFO |
| IRS990ScheduleR/IdRelatedTaxExemptOrgGrp/DisregardedEntityName/BusinessNameLine1Txt | 0 | SEE PART VII - SUPP INFO |
| IRS990ScheduleR/LoansOrGuaranteesFromOthOrgInd | 0 | false |
| IRS990ScheduleR/LoansOrGuaranteesToOtherOrgInd | 0 | false |
| IRS990ScheduleR/PaidEmployeesSharingInd | 0 | false |