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Segment Information - Additional Information (Detail) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2012 Segment | Dec. 31, 2011
Segment Reporting Information [Line Items] |  |
Number of reportable segments | 2 |
Percentage of revenue and income earned by housekeeping in one geographic segment | 99.00% |
Amounts due from major client | Less than 1% of our accounts receivable balance | Less than 1% of our accounts receivable balance

X
- Definition Amounts due from Major Customer. + References No definition available. + Details
Name: | hcsg_AmountsDueFromMajorCustomer
Namespace Prefix: | hcsg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of revenue and income earned in one geographic segment. + References No definition available. + Details
Name: | hcsg_PercentageOfRevenueAndIncomeEarnedInOneGeographicSegment
Namespace Prefix: | hcsg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration