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Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Cash flows from operating activities: |  |
Net income | $ 15,516 us-gaap_NetIncomeLoss | $ 14,639 us-gaap_NetIncomeLoss
Adjustments to reconcile net income to net cash (used in) provided by operating activities: |  |
Depreciation and amortization | 1,911 us-gaap_DepreciationDepletionAndAmortization | 1,757 us-gaap_DepreciationDepletionAndAmortization
Bad debt provision | 925 us-gaap_ProvisionForDoubtfulAccounts | 750 us-gaap_ProvisionForDoubtfulAccounts
Deferred income tax benefits | 525 hcsg_DeferredIncomeTaxExpenseBenefitExcludingTaxBenefitFromEquityCompensationPlans | 3,075 hcsg_DeferredIncomeTaxExpenseBenefitExcludingTaxBenefitFromEquityCompensationPlans
Stock-based compensation expense | 884 us-gaap_ShareBasedCompensation | 762 us-gaap_ShareBasedCompensation
Amortization of premium on marketable securities | 93 us-gaap_InvestmentIncomeAmortizationOfPremium | 88 us-gaap_InvestmentIncomeAmortizationOfPremium
Unrealized gains on deferred compensation fund investments | (365)hcsg_UnrealizedGainLossOnSecuritiesRelatedToDeferredCompensationFund | (264)hcsg_UnrealizedGainLossOnSecuritiesRelatedToDeferredCompensationFund
Changes in operating assets and liabilities: |  |
Accounts and notes receivable | (11,746)us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable | (6,855)us-gaap_IncreaseDecreaseInAccountsAndNotesReceivable
Prepaid income taxes | 912 us-gaap_IncreaseDecreaseInPrepaidTaxes | (1,007)us-gaap_IncreaseDecreaseInPrepaidTaxes
Inventories and supplies | 44 us-gaap_IncreaseDecreaseInInventories | (309)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other assets | (1,235)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets | (2,106)us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
Deferred compensation funding | 451 hcsg_IncreaseDecreaseInDeferredCompensationFunding | (798)hcsg_IncreaseDecreaseInDeferredCompensationFunding
Accounts payable and other accrued expenses | (2,351)us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities | (469)us-gaap_IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities
Accrued payroll, accrued and withheld payroll taxes | (21,002)us-gaap_IncreaseDecreaseInOtherEmployeeRelatedLiabilities | 9,679 us-gaap_IncreaseDecreaseInOtherEmployeeRelatedLiabilities
Accrued insurance claims | 2,979 us-gaap_IncreaseDecreaseInWorkersCompensationLiabilities | 26 us-gaap_IncreaseDecreaseInWorkersCompensationLiabilities
Deferred compensation liability | 76 us-gaap_IncreaseDecreaseInDeferredCompensation | 1,230 us-gaap_IncreaseDecreaseInDeferredCompensation
Income taxes payable | 6,179 us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable | (1,878)us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable
Net cash (used in) provided by operating activities | (6,204)us-gaap_NetCashProvidedByUsedInOperatingActivities | 18,320 us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities: |  |
Disposals of fixed assets | 41 us-gaap_ProceedsFromSaleOfProductiveAssets | 60 us-gaap_ProceedsFromSaleOfProductiveAssets
Additions to property and equipment | (1,436)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment | (1,513)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Purchases of marketable securities | (989)us-gaap_PaymentsToAcquireMarketableSecurities | (1,228)us-gaap_PaymentsToAcquireMarketableSecurities
Sales of marketable securities | 846 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities | 939 us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities
Net cash used in investing activities | (1,538)us-gaap_NetCashProvidedByUsedInInvestingActivities | (1,742)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities: |  |
Dividends paid | (12,655)us-gaap_PaymentsOfDividendsCommonStock | (12,077)us-gaap_PaymentsOfDividendsCommonStock
Reissuance of treasury stock pursuant to Dividend Reinvestment Plan | 26 us-gaap_ProceedsFromIssuanceOfCommonStock | 0 us-gaap_ProceedsFromIssuanceOfCommonStock
Tax benefit from equity compensation plans | 499 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities | 477 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Proceeds from the exercise of stock options | 2,884 us-gaap_ProceedsFromStockOptionsExercised | 2,559 us-gaap_ProceedsFromStockOptionsExercised
Net cash used in financing activities | (9,246)us-gaap_NetCashProvidedByUsedInFinancingActivities | (9,041)us-gaap_NetCashProvidedByUsedInFinancingActivities
Net change in cash and cash equivalents | (16,988)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | 7,537 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of the period | 75,280 us-gaap_CashAndCashEquivalentsAtCarryingValue | 64,155 us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of the period | 58,292 us-gaap_CashAndCashEquivalentsAtCarryingValue | 71,692 us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplementary Cash Flow Information: |  |
Cash paid for interest | 22 us-gaap_InterestPaid | 13 us-gaap_InterestPaid
Cash paid for income taxes, net of refunds | 1,424 us-gaap_IncomeTaxesPaidNet | 7,821 us-gaap_IncomeTaxesPaidNet
Issuance of Common Stock in 2015 and 2014, respectively, pursuant to Employee Stock Purchase Plan | $ 1,701 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan | $ 1,851 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

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- Definition Cash outflow for purchase of trading, available-for-sale securities and held-to-maturity securities. + 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 (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + 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 (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + 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 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + 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 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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