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Discontinued Operations - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended 1 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2012
Beds
Jul. 02, 2012
Mar. 16, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds from sale   $ 6,090us-gaap_ProceedsFromDivestitureOfBusinesses      
Loss on sale of assets 191us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax 191us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax      
Contribution to pension plan 56us-gaap_PensionContributions 56us-gaap_PensionContributions      
Dexter Hospital [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Number of bed facility sold     50ssy_NumberOfBedsSold
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ssy_DexterHospitalMember
   
Memorial Hospital of Adel [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds from sale       8,350us-gaap_ProceedsFromDivestitureOfBusinesses
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ssy_MemorialHospitalOfAdelMember
 
Fulton Hospital [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds from sale   6,090us-gaap_ProceedsFromDivestitureOfBusinesses
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ssy_FultonHospitalMember
     
Loss on sale of assets 191us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ssy_FultonHospitalMember
191us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ssy_FultonHospitalMember
     
Fulton RDA Loan [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Loan agreement amount         5,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= ssy_FultonRdaLoanMember
Date of loan agreement   Mar. 16, 2012      
Fulton RDA Loan [Member] | Fulton Hospital [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Repayment of outstanding loan   4,745us-gaap_RepaymentsOfDebt
/ us-gaap_DebtInstrumentAxis
= ssy_FultonRdaLoanMember
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ssy_FultonHospitalMember
     
Early repayment penalty   $ 237ssy_EarlyRepaymentPenaltyOnDebt
/ us-gaap_DebtInstrumentAxis
= ssy_FultonRdaLoanMember
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= ssy_FultonHospitalMember