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Share-Based Compensation (Summary Of Other Information Of Stock Option Plans) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Total grant-date fair value of stock awards granted $ 4,268hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsGrantDateFairValue $ 3,412hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsGrantDateFairValue $ 2,438hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsGrantDateFairValue
Total fair value of stock awards vested during period 2,051hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOptionsVestedInPeriodTotalFairValue 1,897hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOptionsVestedInPeriodTotalFairValue 1,409hcsg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOptionsVestedInPeriodTotalFairValue
Total unrecognized compensation expense related to non-vested stock awards $ 6,492us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized $ 4,963us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized $ 3,999us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized