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Description of Business and Significant Accounting Policies (Details) (USD $) | 1 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Jul. 31, 2011 | Dec. 31, 2014 segment | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 31, 2013 | Sep. 30, 2014
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Service agreement term |  | 1 year |  |  |  |
Initial period of service term |  | 90 days |  |  |  |
Number of reportable segments |  | 2 us-gaap_NumberOfReportableSegments |  |  |  |
Notes receivable |  | $ 10,208,000 hcsg_NotesReceivableImpairedNonperforming | $ 2,892,000 hcsg_NotesReceivableImpairedNonperforming |  |  |
Discounted notes receivable |  | 10,196,000 hcsg_DiscountedNotesReceivable | 2,880,000 hcsg_DiscountedNotesReceivable |  |  |
Marketable securities |  | 11,799,000 us-gaap_MarketableSecurities |  |  |  |
Unrealized gains from marketable securities |  | 25,000 us-gaap_MarketableSecuritiesUnrealizedGainLoss |  |  |  |
Amortization period of inventories and supplies |  | 24 months |  |  |  |
Depreciation expense |  | 3,946,000 us-gaap_Depreciation | 3,373,000 us-gaap_Depreciation | 2,947,000 us-gaap_Depreciation |  |
Impairment loss on goodwill and intangible assets |  | 0 us-gaap_GoodwillAndIntangibleAssetImpairment | 0 us-gaap_GoodwillAndIntangibleAssetImpairment | 0 us-gaap_GoodwillAndIntangibleAssetImpairment |  |
Percentage of reduction of Medicare payments to nursing centers | 11.10%hcsg_PercentageOfReductionOfMedicarePaymentsToNursingCenters |  |  |  |  |
Autos And Trucks [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Useful life |  | 3 years |  |  |  |
Minimum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Days to notify cancellation of service |  | 30 days |  |  |  |
Property and equipment payment terms |  | 24 months |  |  |  |
Percentage of revenue from a major client |  | 3.00%hcsg_PercentageOfRevenueFromMajorCustomer / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |
Minimum [Member] | Laundry And Linen Equipment Installations [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Useful life |  | 3 years |  |  |  |
Minimum [Member] | Housekeeping, And Office Furniture And Equipment [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Useful life |  | 3 years |  |  |  |
Maximum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Days to notify cancellation of service |  | 90 days |  |  |  |
Property and equipment payment terms |  | 60 months |  |  |  |
Percentage of reduction of Medicare payments to plans and providers |  |  |  |  | 2.00%hcsg_PercentageOfReductionOfMedicarePaymentsToPlansAndProviders / us-gaap_RangeAxis = us-gaap_MaximumMember |
Percentage of revenue from a major client |  | 6.00%hcsg_PercentageOfRevenueFromMajorCustomer / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |
Maximum [Member] | Laundry And Linen Equipment Installations [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Useful life |  | 7 years |  |  |  |
Maximum [Member] | Housekeeping, And Office Furniture And Equipment [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Useful life |  | 7 years |  |  |  |
Change in Self-Insurance Reserve [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Self-insurance claims reserve adjustment |  |  |  |  |  | $ 37,416,000 hcsg_SelfInsuranceClaimsReserveAdjustment / us-gaap_ChangeInAccountingEstimateByTypeAxis = hcsg_ChangeinSelfInsuranceReserveMember
Non-cash, tax-effected charge, impact per diluted share |  |  |  |  |  | $ 0.33 hcsg_NoncashTaxEffectedChargeImpactPerDilutedShare / us-gaap_ChangeInAccountingEstimateByTypeAxis = hcsg_ChangeinSelfInsuranceReserveMember
Change in Self-Insurance Reserve [Member] | Minimum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Estimated self-insurance claim close-out period |  |  |  |  |  | 15 years
Change in Self-Insurance Reserve [Member] | Maximum [Member] |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Estimated self-insurance claim close-out period |  |  |  |  |  | 17 years

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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