XML 75 R54.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Earnings Per Common Share - Additional Information (Details) - $ / shares shares in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Earnings Per Share [Abstract] |  |  |  |
Options outstanding to purchase common stock excluded from computation of diluted earnings per common share (in shares) | 0.5 | 0.6 | 0.5 | 0.6
Antidilutive securities excluded from earnings per share, average exercise price (in dollars per share) | $ 39.38 | $ 34.14 | $ 39.38 | $ 34.14

X
- Definition Share Based Compensation Shares Authorized Under Stock Option Plan Exercise Price Range Exercisable Options Weighted Average Exercise Price + References No definition available. + Details
Name: | hcsg_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlanExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice
Namespace Prefix: | hcsg_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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