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v2.4.1.9

Business Segments (Segment Reporting Information) (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 segment | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 475,808,000us-gaap_SalesRevenueServicesNet | $ 477,391,000us-gaap_SalesRevenueServicesNet | $ 468,081,000us-gaap_SalesRevenueServicesNet | $ 438,642,000us-gaap_SalesRevenueServicesNet | $ 422,906,000us-gaap_SalesRevenueServicesNet | $ 420,623,000us-gaap_SalesRevenueServicesNet | $ 407,244,000us-gaap_SalesRevenueServicesNet | $ 378,154,000us-gaap_SalesRevenueServicesNet | $ 1,859,922,000us-gaap_SalesRevenueServicesNet | $ 1,628,927,000us-gaap_SalesRevenueServicesNet | $ 1,134,614,000us-gaap_SalesRevenueServicesNet
Gross profit | 153,534,000us-gaap_GrossProfit | 155,182,000us-gaap_GrossProfit | 152,203,000us-gaap_GrossProfit | 136,993,000us-gaap_GrossProfit | 129,094,000us-gaap_GrossProfit | 126,398,000us-gaap_GrossProfit | 120,745,000us-gaap_GrossProfit | 109,252,000us-gaap_GrossProfit | 597,912,000us-gaap_GrossProfit | 485,489,000us-gaap_GrossProfit | 352,709,000us-gaap_GrossProfit
Operating Income |  |  |  |  |  |  |  |  | 146,270,000us-gaap_OperatingIncomeLoss | 124,380,000us-gaap_OperatingIncomeLoss | 82,272,000us-gaap_OperatingIncomeLoss
Depreciation |  |  |  |  |  |  |  |  | 13,300,000us-gaap_Depreciation | 8,000,000us-gaap_Depreciation | 6,500,000us-gaap_Depreciation
Amortization of intangible assets |  |  |  |  |  |  |  |  | 24,401,000us-gaap_AmortizationOfIntangibleAssets | 21,686,000us-gaap_AmortizationOfIntangibleAssets | 17,863,000us-gaap_AmortizationOfIntangibleAssets
Assets | 1,274,174,000us-gaap_Assets |  |  |  | 1,258,809,000us-gaap_Assets |  |  |  | 1,274,174,000us-gaap_Assets | 1,258,809,000us-gaap_Assets |
Reportable segments (in number of segments) |  |  |  |  |  |  |  |  | 4us-gaap_NumberOfReportableSegments |  |
Apex |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,190,052,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember | 1,059,993,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember | 617,844,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember
Gross profit |  |  |  |  |  |  |  |  | 335,322,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember | 294,611,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember | 174,968,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember
Operating Income |  |  |  |  |  |  |  |  | 121,334,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember | 98,588,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember | 57,191,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember
Amortization of intangible assets |  |  |  |  |  |  |  |  | 16,356,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember | 19,524,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember | 15,665,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_ApexSegmentMember
Oxford |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 493,320,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember | 423,670,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember | 375,196,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember
Gross profit |  |  |  |  |  |  |  |  | 208,607,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember | 147,348,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember | 132,034,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember
Operating Income |  |  |  |  |  |  |  |  | 66,315,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember | 60,544,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember | 57,703,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember
Amortization of intangible assets |  |  |  |  |  |  |  |  | 5,491,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember | 965,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember | 437,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_OxfordSegmentMember
Physician |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 135,181,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember | 105,827,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember | 102,679,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember
Gross profit |  |  |  |  |  |  |  |  | 40,477,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember | 30,614,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember | 31,455,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember
Operating Income |  |  |  |  |  |  |  |  | 9,797,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember | 8,853,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember | 9,998,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember
Amortization of intangible assets |  |  |  |  |  |  |  |  | 2,272,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember | 742,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember | 816,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_PhysicianSegmentMember
Life Sciences Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 41,369,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember | 39,437,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember | 38,895,000us-gaap_SalesRevenueServicesNet / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember
Gross profit |  |  |  |  |  |  |  |  | 13,506,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember | 12,916,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember | 14,252,000us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember
Operating Income |  |  |  |  |  |  |  |  | 3,878,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember | 5,574,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember | 4,481,000us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember
Amortization of intangible assets |  |  |  |  |  |  |  |  | 274,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember | 364,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember | 654,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = asgn_LifeSciencesEuropeMember
Corporate |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  | (55,054,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | (49,179,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | (47,101,000)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember
Amortization of intangible assets |  |  |  |  |  |  |  |  | $ 8,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | $ 91,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember | $ 291,000us-gaap_AmortizationOfIntangibleAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_CorporateMember

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