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Allowance for Doubtful Accounts - Reserve For Impaired Notes Receivable (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reserve for Impaired Notes Receivable |  |  |
Balance Beginning of Year | $ 3,031 | $ 2,019 | $ 958
Additions | 99 | 2,489 | 1,072
Deductions | 991 | 1,477 | 11
Balance End of Year | $ 2,139 | $ 3,031 | $ 2,019

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- Definition Decrease In Reserved For Impaired Notes Receivable + References No definition available. + Details
Name: | hcsg_DecreaseInReservedForImpairedNotesReceivable
Namespace Prefix: | hcsg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Increase In Reserved For Impaired Notes Receivable + References No definition available. + Details
Name: | hcsg_IncreaseInReservedForImpairedNotesReceivable
Namespace Prefix: | hcsg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration