Goodwill And Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Goodwill, Gross Carrying Amount	$ 289,207	$ 288,857
Goodwill, Net Carrying Amount	289,207	288,857
Other Intangible Assets, Gross Carrying Amount	$ 234,090	$ 229,690
Other Intangible Assets, Weighted Average Amortization Period	5 years	5 years
Other Intangible Assets, Accumulated Amortization	$ (187,318)	$ (147,972)
Other Intangible Assets, Net Carrying Amount	46,772	81,718
Goodwill and Other Intangible Assets, Gross Carrying Amount	523,297	518,547
Goodwill and Other Intangible Assets, Net Carrying Amount	335,979	370,575
Customer Contracts
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Gross Carrying Amount	$ 209,850	$ 209,850
Other Intangible Assets, Weighted Average Amortization Period	5 years	5 years
Other Intangible Assets, Accumulated Amortization	$ (167,968)	$ (134,454)
Other Intangible Assets, Net Carrying Amount	41,882	75,396
Trademarks
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Gross Carrying Amount	$ 16,900	$ 16,900
Other Intangible Assets, Weighted Average Amortization Period	3 years	3 years
Other Intangible Assets, Accumulated Amortization	$ (16,467)	$ (11,761)
Other Intangible Assets, Net Carrying Amount	433	5,139
Developed technology
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Gross Carrying Amount	$ 5,400	$ 1,000
Other Intangible Assets, Weighted Average Amortization Period	5 years	5 years
Other Intangible Assets, Accumulated Amortization	$ (1,173)	$ (533)
Other Intangible Assets, Net Carrying Amount	4,227	467
Non-compete Agreements
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Gross Carrying Amount	$ 1,940	$ 1,940
Other Intangible Assets, Weighted Average Amortization Period	3 years	3 years
Other Intangible Assets, Accumulated Amortization	$ (1,710)	$ (1,224)
Other Intangible Assets, Net Carrying Amount	$ 230	$ 716