Goodwill And Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands			12 Months Ended
	Oct. 01, 2016	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Goodwill, Gross Carrying Amount			$ 289,207	$ 289,207
Goodwill, Net Carrying Amount			289,207	289,207
Other Intangible Assets, Gross Carrying Amount			234,390	234,090
Other Intangible Assets, Accumulated Amortization			(203,316)	(187,318)
Other Intangible Assets, Net Carrying Amount			$ 31,074	46,772
Customer Contracts
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Weighted Average Amortization Period	10 years	5 years	10 years
Other Intangible Assets, Gross Carrying Amount			$ 209,850	209,850
Other Intangible Assets, Accumulated Amortization			(182,168)	(167,968)
Other Intangible Assets, Net Carrying Amount			$ 27,682	41,882
Trademarks
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Weighted Average Amortization Period			3 years
Other Intangible Assets, Gross Carrying Amount			$ 16,900	16,900
Other Intangible Assets, Accumulated Amortization			(16,900)	(16,467)
Other Intangible Assets, Net Carrying Amount			$ 0	433
Developed technology
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Weighted Average Amortization Period			5 years
Other Intangible Assets, Gross Carrying Amount			$ 5,700	5,400
Other Intangible Assets, Accumulated Amortization			(2,308)	(1,173)
Other Intangible Assets, Net Carrying Amount			$ 3,392	4,227
Non-compete Agreements
Finite-Lived Intangible Assets [Line Items]
Other Intangible Assets, Weighted Average Amortization Period			3 years
Other Intangible Assets, Gross Carrying Amount			$ 1,940	1,940
Other Intangible Assets, Accumulated Amortization			(1,940)	(1,710)
Other Intangible Assets, Net Carrying Amount			$ 0	$ 230