Dividends - Cash Dividends per Common Share (Details) - $ / shares	3 Months Ended	6 Months Ended
Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Equity [Abstract]
Cash dividends per common share (in dollars per share)	$ 0.18	$ 0.18	$ 0.36	$ 0.36

Common Stock, Weighted Average, Dividends, Per Share, Cash Paid

No definition available.

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Namespace Prefix:	hcsg_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration