Acquisitions (Schedule of Intangible Assets Acquired as Part of Business Combination) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended														6 Months Ended
	Jun. 30, 2014 Contractor Relations [Member]	Jun. 30, 2014 Non-compete agreements	Jun. 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	Jun. 30, 2014 Minimum [Member] Customer relations	Jun. 30, 2014 Maximum [Member] Customer relations
Acquired Intangible Assets [Line Items]
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