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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended
Nov. 01, 2014
bed
Oct. 30, 2014
bed
Oct. 22, 2014
subsidiary
Sep. 24, 2014
Jul. 01, 2014
bed
Dec. 31, 2014
bed
facility
Dec. 31, 2013
Feb. 28, 2013
Jun. 12, 2013
agreement
Sep. 22, 2014
facility
Jun. 30, 2013
facility
Dec. 31, 2013
facility
Mar. 31, 2014
bed
Sep. 30, 2014
bed
Sep. 30, 2014
bed
Oct. 26, 2013
Oct. 29, 2014
facility
Dec. 31, 2012
Jun. 12, 2014
lease_agreement
Acquisition Policy                                      
Number of facilities           32adk_NumberOfFacilities                          
Number of skilled nursing facilities           29adk_NumberOfSkilledNursingFacilities                          
Number of assisted living facilities           2adk_NumberOfAssistedLivingFacilities                          
Number of units (beds)   118adk_NumberOfUnitsInFacilities       3,600adk_NumberOfUnitsInFacilities                          
Number of independent living facilities           1adk_NumberOfIndependentLivingAndSeniorHousingFacilities                          
Number of facilities managed           4adk_NumberOfFacilitiesManaged                          
Number of sublease agreements executed, owned by company           3adk_NumberofSubleaseAgreementsExecutedOwnedbyCompany                          
Number of sublease agreements executed, leased by company           5adk_NumberofSubleaseAgreementsExecutedLeasedbyCompany                          
Number of facilities owned and operated           22adk_NumberOfFacilitiesOwnedAndOperated                          
Number of facilities leased and operated           6adk_NumberOfFacilitiesLeasedAndOperated                          
Number of skilled nursing facilities under non-cancelable operating leases           11adk_OperatingLeasesNumberOfSkilledNursingFacilitiesLeased                          
Number of beds sub-leased 134adk_NumberofBedsSubleased       52adk_NumberofBedsSubleased                            
Number of subsidiaries     2adk_NumberofSubsidiaries                                
Number of sublease agreements executed           8adk_NumberOfSubleaseAgreementsExecuted                          
Net carrying amount of intangibles           $ 39,651,000us-gaap_IntangibleAssetsNetExcludingGoodwill $ 43,147,000us-gaap_IntangibleAssetsNetExcludingGoodwill         43,147,000us-gaap_IntangibleAssetsNetExcludingGoodwill           $ 45,634,000us-gaap_IntangibleAssetsNetExcludingGoodwill  
Advertising expense           300,000us-gaap_AdvertisingExpense 400,000us-gaap_AdvertisingExpense                        
Repayment of debt       4,500,000.0us-gaap_RepaymentsOfDebt                              
Lincoln Lodge                                      
Acquisition Policy                                      
Gain (loss) on sale of business operation               100,000us-gaap_GainLossOnSaleOfBusiness
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= adk_LincolnLodgeRetirementResidenceMember
                     
Proceeds from sales of business               600,000us-gaap_ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= adk_LincolnLodgeRetirementResidenceMember
                     
Tybee Island Skilled Nursing Facilities                                      
Acquisition Policy                                      
Number of facilities             2adk_NumberOfFacilities
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= adk_TybeeIslandSkilledNursingFacilitiesMember
                       
Number of sub-lease agreement                                     2adk_NumberofSubleaseAgreement
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= adk_TybeeIslandSkilledNursingFacilitiesMember
Number of sublease agreements executed                 2adk_NumberOfSubleaseAgreementsExecuted
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= adk_TybeeIslandSkilledNursingFacilitiesMember
                   
CON/bed licenses                                      
Acquisition Policy                                      
Net carrying amount of intangibles           33,093,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= adk_BedLicensesIncludedInPropertyAndEquipmentMember
35,787,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= adk_BedLicensesIncludedInPropertyAndEquipmentMember
        35,787,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= adk_BedLicensesIncludedInPropertyAndEquipmentMember
          37,040,000us-gaap_IntangibleAssetsNetExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= adk_BedLicensesIncludedInPropertyAndEquipmentMember
 
Senior debt - guaranteed by HUD | Lincoln Lodge                                      
Acquisition Policy                                      
Repayment of debt               1,900,000us-gaap_RepaymentsOfDebt
/ us-gaap_DebtInstrumentAxis
= adk_SeniorDebtHUDMember
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= adk_LincolnLodgeRetirementResidenceMember
                     
Georgia                                      
Acquisition Policy                                      
Number of facilities                     2adk_NumberOfFacilities
/ us-gaap_StatementGeographicalAxis
= stpr_GA
               
Number of sub-lease agreement     2adk_NumberofSubleaseAgreement
/ us-gaap_StatementGeographicalAxis
= stpr_GA
          2adk_NumberofSubleaseAgreement
/ us-gaap_StatementGeographicalAxis
= stpr_GA
                   
Number of facilities reported as discontinued operations                   2adk_NumberofFacilitiesReportedasDiscontinuedOperations
/ us-gaap_StatementGeographicalAxis
= stpr_GA
  2adk_NumberofFacilitiesReportedasDiscontinuedOperations
/ us-gaap_StatementGeographicalAxis
= stpr_GA
             
Dublin, Georgia                                      
Acquisition Policy                                      
Number of units (beds)     130adk_NumberOfUnitsInFacilities
/ us-gaap_StatementGeographicalAxis
= adk_DublinGeorgiaMember
                               
Number of sublease agreements executed     1adk_NumberOfSubleaseAgreementsExecuted
/ us-gaap_StatementGeographicalAxis
= adk_DublinGeorgiaMember
                               
Lumber city, Georgia                                      
Acquisition Policy                                      
Number of units (beds)     86adk_NumberOfUnitsInFacilities
/ us-gaap_StatementGeographicalAxis
= adk_LumbercityGeorgiaMember
                               
Number of sublease agreements executed     1adk_NumberOfSubleaseAgreementsExecuted
/ us-gaap_StatementGeographicalAxis
= adk_LumbercityGeorgiaMember
                               
OKLAHOMA                                      
Acquisition Policy                                      
Number of units under agreement to sale                         102adk_NumberofUnitsUnderAgreementtoSale
/ us-gaap_StatementGeographicalAxis
= stpr_OK
           
ALABAMA                                      
Acquisition Policy                                      
Number of skilled nursing facilities                   2adk_NumberOfSkilledNursingFacilities
/ us-gaap_StatementGeographicalAxis
= stpr_AL
                 
Number of units under agreement to sale VIE (beds)                       105adk_NumberofUnitsUnderAgreementtoSaleVIE
/ us-gaap_StatementGeographicalAxis
= stpr_AL
             
Number of facilities reported as discontinued operations                   2adk_NumberofFacilitiesReportedasDiscontinuedOperations
/ us-gaap_StatementGeographicalAxis
= stpr_AL
                 
Number of subsidiaries                   2adk_NumberofSubsidiaries
/ us-gaap_StatementGeographicalAxis
= stpr_AL
                 
Casaville Missouri                                      
Acquisition Policy                                      
Number of units (beds)                           90adk_NumberOfUnitsInFacilities
/ us-gaap_StatementGeographicalAxis
= adk_CasavilleMissouriMember
90adk_NumberOfUnitsInFacilities
/ us-gaap_StatementGeographicalAxis
= adk_CasavilleMissouriMember
       
Tulsa, Oklahoma                                      
Acquisition Policy                                      
Number of units (beds)           102adk_NumberOfUnitsInFacilities
/ us-gaap_StatementGeographicalAxis
= adk_TulsaOklahomaMember
                         
Convertible debt issued in 2010                                      
Acquisition Policy                                      
Derivative gain                               $ 3,000,000us-gaap_DerivativeGainOnDerivative
/ us-gaap_DerivativeInstrumentRiskAxis
= adk_ConvertibleSubordinatedPromissoryNotesIssuedIn2010Member
     
One                                      
Acquisition Policy                                      
Number of sublease agreements executed, owned by company                                 1adk_NumberofSubleaseAgreementsExecutedOwnedbyCompany
/ adk_NewContractsAxis
= adk_ContractOneMember
   
Two                                      
Acquisition Policy                                      
Number of sublease agreements executed                                 3adk_NumberOfSubleaseAgreementsExecuted
/ adk_NewContractsAxis
= adk_ContractTwoMember
   
Three                                      
Acquisition Policy                                      
Number of sublease agreements executed                                 1adk_NumberOfSubleaseAgreementsExecuted
/ adk_NewContractsAxis
= adk_ContractThreeMember