| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 1561300 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 1875577 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | THE FOUNDATION, CHARTERED BY CONGRESS AS THE OFFICIAL NON-PROFIT PARTNERS OF THE US FOREST SERVICE, ENGAGES AMERICANS IN COMMUNITY BASED AND NATIONAL PROGRAMS THAT PROMOTE THE HEALTH AND PUBLIC ENJOYMENT OF THE 193 MILLION ACRE NATIONAL FOREST SYSTEM. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 2493 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 1323 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 3816 |
| IRS990/AllOtherContributionsAmt | 0 | 10443621 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | WILLIAM POSSIEL |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4065422805 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | BLDG 27 STE 3 FORT MISSOULA RD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | MISSOULA |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | MT |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 59804 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 2 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 152447 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 159105 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 319261 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 630813 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConferencesMeetingsGrp/FundraisingAmt | 0 | 82588 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 65525 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 53289 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 201402 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 347124 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 188481 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | W13196 STATE ROAD 95 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 63026 LOWER MEADOW DR 200 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | BLAIR |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | BEND |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | WI |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | OR |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 54616 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 97701 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | JASON CAPOUCH |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | EMPIRE CONSTRUCTION & DEVELOPMENT |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | BISON FENCE CONSTRUCTION |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | OVERLOOK CONSTRUCTION |
| IRS990/ContriRptFundraisingEventAmt | 0 | 338396 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 15901768 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 7597382 |
| IRS990/CYInvestmentIncomeAmt | 0 | 10906 |
| IRS990/CYOtherExpensesAmt | 0 | 2443710 |
| IRS990/CYOtherRevenueAmt | 0 | 12669 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 938989 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 4279365 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 2543875 |
| IRS990/CYTotalExpensesAmt | 0 | 12584967 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1026532 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 16864332 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 2242168 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 2368706 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 3967 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 2363 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 8433 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 14763 |
| IRS990/Desc | 0 | FOREST SERVICE GRANTS: MAINTAIN AND UPGRADE VISITOR AMENITIES, TRAILS, AND INTERPRETIVE DISPLAYS; IMPROVE ACCESS AND UNDERSTANDING OF NATIONAL FOREST RESOURCES; RESTORE HABITAT OF NATIVE SPECIES; PROMOTE RECREATIONAL FACILITIES AND RESPONSIBLE APPRECIATION OF WILDLIFE. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 47 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 6669799 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditPerformedInd | 0 | 1 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 1 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 52325 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 52325 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 120808 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 10310 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 643159 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 774277 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| 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/AverageHoursPerWeekRt | 22 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 2 | X |
| 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/IndividualTrusteeOrDirectorInd | 21 | 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/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/OtherCompensationAmt | 22 | 24800 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 25279 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 8824 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 6356 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | CRAIG R BARRETT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | JOHN HENDRICKS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | MAX CHAPMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | LEE FROMSON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | TIMOTHY PROCTOR SCHIEFFELIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | CAROLINE CHOI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | PETER FOREMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | DAVID BELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | MIKE BROWN JR |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | COLEMAN BURKE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | ROBERT COLE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | BART EBERWEIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | ROBERT FEITLER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | BARRY FINGERHUT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | RICK FRAZIER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | ROJE GOOTEE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | ANDIE MCDOWELL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | JEFF PARO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | PATRICIA HAYLING-PRICE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | MARY SMART |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | CHAID WEISS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | JAMES YARDLEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | WILLIAM J POSSIEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | RAY FOOTE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | MARY MITSOS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | ROBIN HILL |
| 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/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/ReportableCompFromOrgAmt | 22 | 589128 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 222438 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 111144 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 110124 |
| 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/ReportableCompFromRltdOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | VICE CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | EXECUTIVE COMMITTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | EXECUTIVE COMMITTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | DIRECTOR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | EXECUTIVE VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | EXECUTIVE VICE PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | CONTROLLER |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1993 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 1 |
| IRS990/FundraisingAmt | 0 | 338396 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 88853 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 37983 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | -1309 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 22 |
| IRS990/GovernmentGrantsAmt | 0 | 5025221 |
| IRS990/GrantAmt | 0 | 5626827 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 7597382 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 7597382 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 1 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 3062743 |
| IRS990/GrossReceiptsAmt | 0 | 20017237 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 22 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 4 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 2245 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 580 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 18321 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 21146 |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 2756 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 8025 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 1828 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 12609 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 32301 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 17201 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 12215 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 12215 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 506121 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 158965 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 2054170 |
| IRS990/IRPDocumentCnt | 0 | 30 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 208948 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 36622 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 25611 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 234559 |
| IRS990/LegalDomicileStateCd | 0 | DC |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 3064052 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 94530 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | THE NATIONAL FOREST FOUNDATION, CHARTERED BY CONGRESS, ENGAGES AMERICA IN COMMUNITY-BASED AND NATIONAL PROGRAMS THAT PROMOTE THE HEALTH AND PUBLIC ENJOYMENT OF THE 193-MILLION ACRE NATIONAL FOREST SYSTEM, AND ACCEPTS AND ADMINISTERS PRIVATE GIFTS OF FUNDS AND LAND FOR THE BENEFIT OF THE NATIONAL FORESTS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 8703134 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 12841464 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | -1309 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | -1309 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | -50870 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | -50870 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -141035 |
| IRS990/NoncashContributionsAmt | 0 | 115856 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 20664 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 15602 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 44981 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 81247 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 83193 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 38776 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 37191 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 159160 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsSFAS117Ind | 0 | X |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 57288 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 35688 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 123764 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 216740 |
| IRS990/OtherExpensesGrp/Desc | 0 | CONSERVATION DIRECT COS |
| IRS990/OtherExpensesGrp/Desc | 1 | OTHER EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 2 | EQUIP MAINT & RENTAL |
| IRS990/OtherExpensesGrp/Desc | 3 | DUES & PUBL. |
| IRS990/OtherExpensesGrp/FundraisingAmt | 0 | 25963 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 1 | 1415 |
| IRS990/OtherExpensesGrp/FundraisingAmt | 2 | 7945 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 37105 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 27538 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 326 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 723504 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 64476 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 7710 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 1023 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 723504 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 127544 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 36663 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 9294 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 158965 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 190593 |
| IRS990/OtherRevenueMiscGrp/BusinessCd | 0 | 900099 |