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Related Party Transactions (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Related Party Transaction, Due from (to) Related Party [Abstract] |  |  |
Fees paid to related party firm (less than) | $ 120,000 | $ 120,000 | $ 120,000
Percentage of fee paid to related party in relation to related party's total revenue (less than) | 5.00% | 5.00% | 5.00%

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- Definition Related Party Transaction, Fees Paid Related Party As A Percentage Of Overall Related Party Revenues + References No definition available. + Details
Name: | hcsg_RelatedPartyTransactionFeesPaidRelatedPartyAsPercentageOfOverallRelatedPartyRevenues
Namespace Prefix: | hcsg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionDueFromToRelatedPartyAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
Name: | us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration