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Acquisition (Narrative) (Details) (Platinum Health Services, LLC [Member], USD $) In Thousands, unless otherwise specified | 0 Months Ended | 3 Months Ended
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Jul. 12, 2013 | Mar. 31, 2015
Business Acquisition [Line Items] |  |
Total purchase consideration | $ 50,766 us-gaap_BusinessCombinationConsiderationTransferred1 |
Cash payments to acquire business | 5,000 us-gaap_PaymentsToAcquireBusinessesGross |
Equity interest issued to acquiree (number of shares) | 1,215 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued |
Equity interest issued to acquiree | 30,062 us-gaap_BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned |
Contingent consideration fair value | $ 15,704 us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred |
Contingent Consideration, Total Shares [Member] |  |
Business Acquisition [Line Items] |  |
Equity interest issued to acquiree (number of shares) | 1,005 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = hcsg_PlatinumHealthServicesLLCMember / us-gaap_ContingentConsiderationByTypeAxis = hcsg_TotalContingentConsiderationMember |
Contingent Consideration, Shares Issued [Member] |  |
Business Acquisition [Line Items] |  |
Equity interest issued to acquiree (number of shares) |  | 652 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = hcsg_PlatinumHealthServicesLLCMember / us-gaap_ContingentConsiderationByTypeAxis = hcsg_ContingentConsiderationIssuedMember
Contingent Consideration, Shares Not Issued [Member] |  |
Business Acquisition [Line Items] |  |
Equity interest issued to acquiree (number of shares) |  | 353 us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued / us-gaap_BusinessAcquisitionAxis = hcsg_PlatinumHealthServicesLLCMember / us-gaap_ContingentConsiderationByTypeAxis = hcsg_ContingentConsiderationNotIssuedMember

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- Definition Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Number of shares of equity interests issued or issuable to acquire entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(4) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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- Definition Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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