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Acquisitions (Schedule of Intangible Assets Acquired as Part of Business Combination) (Details) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended 9 Months Ended
Sep. 30, 2014
Contractor Relations [Member]
Sep. 30, 2014
Non-compete agreements
Sep. 30, 2014
Computer Software, Intangible Asset [Member]
Dec. 05, 2013
CyberCoders [Member]
Dec. 05, 2013
CyberCoders [Member]
Trademarks [Member]
Dec. 05, 2013
CyberCoders [Member]
Contractor Relations [Member]
Dec. 05, 2013
CyberCoders [Member]
Customer relations
Dec. 05, 2013
CyberCoders [Member]
Non-compete agreements
Dec. 05, 2013
CyberCoders [Member]
Computer Software, Intangible Asset [Member]
Dec. 02, 2013
Whitaker [Member]
Dec. 02, 2013
Whitaker [Member]
Trademarks [Member]
Dec. 02, 2013
Whitaker [Member]
Contractor Relations [Member]
Dec. 02, 2013
Whitaker [Member]
Customer relations
Dec. 02, 2013
Whitaker [Member]
Non-compete agreements
Sep. 30, 2014
Minimum [Member]
Customer relations
Sep. 30, 2014
Maximum [Member]
Customer relations
Acquired Intangible Assets [Line Items]                                
Acquired Finite Lived Intangible Assets Average Useful Life 2 years 6 months 3 years 6 years                       3 years 7 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill       $ 36,450 $ 12,100 $ 3,900 $ 750 $ 800 $ 18,900 $ 9,760 $ 2,000 $ 1,800 $ 5,900 $ 60