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Dividends - Cash Dividends per Common Share (Details) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Equity [Abstract]
Cash dividends per common share (in dollars per share)	$ 0.18	$ 0.18

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration