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v2.4.1.9

Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Statement [Abstract] |  |  |
Net service revenues | $ 4,695,014 us-gaap_SalesRevenueServicesNet | $ 4,245,895 us-gaap_SalesRevenueServicesNet | $ 4,111,213 us-gaap_SalesRevenueServicesNet
Direct costs of services, consisting of payroll, payroll taxes, benefit costs and reimbursable expenses | 2,772,098 us-gaap_CostOfServices | 2,522,803 us-gaap_CostOfServices | 2,462,153 us-gaap_CostOfServices
Gross margin | 1,922,916 us-gaap_GrossProfit | 1,723,092 us-gaap_GrossProfit | 1,649,060 us-gaap_GrossProfit
Selling, general and administrative expenses | 1,425,734 us-gaap_SellingGeneralAndAdministrativeExpense | 1,324,815 us-gaap_SellingGeneralAndAdministrativeExpense | 1,305,614 us-gaap_SellingGeneralAndAdministrativeExpense
Amortization of intangible assets | 557 us-gaap_AmortizationOfIntangibleAssets | 1,700 us-gaap_AmortizationOfIntangibleAssets | 398 us-gaap_AmortizationOfIntangibleAssets
Interest income, net | (724)us-gaap_InterestIncomeExpenseNet | (1,002)us-gaap_InterestIncomeExpenseNet | (1,197)us-gaap_InterestIncomeExpenseNet
Income before income taxes | 497,349 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 397,579 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 344,245 us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Provision for income taxes | 191,421 us-gaap_IncomeTaxExpenseBenefit | 145,384 us-gaap_IncomeTaxExpenseBenefit | 134,303 us-gaap_IncomeTaxExpenseBenefit
Net income | 305,928 us-gaap_NetIncomeLoss | 252,195 us-gaap_NetIncomeLoss | 209,942 us-gaap_NetIncomeLoss
Net income available to common stockholders—diluted | $ 305,928 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 252,192 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted | $ 208,867 us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted
Net income per share: |  |  |
Basic | $ 2.28 us-gaap_EarningsPerShareBasic | $ 1.85 us-gaap_EarningsPerShareBasic | $ 1.51 us-gaap_EarningsPerShareBasic
Diluted | $ 2.26 us-gaap_EarningsPerShareDiluted | $ 1.83 us-gaap_EarningsPerShareDiluted | $ 1.50 us-gaap_EarningsPerShareDiluted
Shares: |  |  |
Basic | 134,358 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 136,153 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 138,201 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Diluted | 135,541 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 137,589 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 139,409 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Cash dividends declared per share | $ 0.72 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.64 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.60 us-gaap_CommonStockDividendsPerShareDeclared

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