Goodwill and Intangible Assets - Intangibles, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Net
Accumulated Amortization	$ (112,985)	$ (96,369)
Intangible Assets, Net (finite life)	162,465
Intangible Assets, Net (Excluding Goodwill)
Gross Carrying Value	475,450	471,760
Accumulated Amortization	(112,985)	(96,369)
Intangible assets, net	$ 362,465	375,391
Trade names
Finite-Lived Intangible Assets, Net
Average Remaining Useful Life (in years)	4 years 2 months 12 days
Gross Carrying Value (finite life)	$ 2,410	2,130
Accumulated Amortization	(1,509)	(1,167)
Intangible Assets, Net (finite life)	901	963
Intangible Assets, Net (Excluding Goodwill)
Accumulated Amortization	$ (1,509)	(1,167)
Customer relationships
Finite-Lived Intangible Assets, Net
Average Remaining Useful Life (in years)	12 years 3 months 18 days
Gross Carrying Value (finite life)	$ 237,620	235,300
Accumulated Amortization	(94,851)	(82,010)
Intangible Assets, Net (finite life)	142,769	153,290
Intangible Assets, Net (Excluding Goodwill)
Accumulated Amortization	$ (94,851)	(82,010)
Proprietary technology
Finite-Lived Intangible Assets, Net
Average Remaining Useful Life (in years)	9 years
Gross Carrying Value (finite life)	$ 32,240	32,240
Accumulated Amortization	(14,849)	(11,645)
Intangible Assets, Net (finite life)	17,391	20,595
Intangible Assets, Net (Excluding Goodwill)
Accumulated Amortization	$ (14,849)	(11,645)
Other
Finite-Lived Intangible Assets, Net
Average Remaining Useful Life (in years)	7 years 10 months 24 days
Gross Carrying Value (finite life)	$ 3,180	2,090
Accumulated Amortization	(1,776)	(1,547)
Intangible Assets, Net (finite life)	1,404	543
Intangible Assets, Net (Excluding Goodwill)
Accumulated Amortization	(1,776)	(1,547)
Trade names
Indefinite-Lived Intangible Assets (Excluding Goodwill)
Indefinite-lived intangible assets	$ 200,000	$ 200,000