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Percentage Contribution of Major Customer to Revenue (Detail) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenues from a major customer | 7.00% | 9.00% | 7.00% | 9.00%
Housekeeping Services |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenues from a major customer | 9.00% | 11.00% | 9.00% | 11.00%
Dietary Services |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenues from a major customer | 3.00% | 5.00% | 3.00% | 6.00%

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- Definition Percentage of Revenue from a Major Customer. + References No definition available. + Details
Name: | hcsg_PercentageOfRevenueFromMajorCustomer
Namespace Prefix: | hcsg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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