Long-Lived Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Summary of carrying value of assets
Gross Carrying Amount	$ 259,917	$ 267,017
Accumulated Amortization	(174,971)	(175,382)
Net Amount	84,946	91,635
Client contracts
Summary of carrying value of assets
Gross Carrying Amount	127,261	135,488
Accumulated Amortization	(82,647)	(88,585)
Net Amount	44,614	46,903
Software
Summary of carrying value of assets
Gross Carrying Amount	132,656	131,529
Accumulated Amortization	(92,324)	(86,797)
Net Amount	$ 40,332	$ 44,732