Goodwill and Identified Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 227,489		$ 227,489		$ 285,752
Accumulated Amortization	(86,405)		(86,405)		(90,841)
Net Carrying Amount	141,084		141,084		194,911
Definite-lived intangible asset impairment	41,032	$ 0	$ 41,032	$ 0
License agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)			10 years 3 months 14 days
Gross Carrying Amount	4,489		$ 4,489		4,418
Accumulated Amortization	(3,578)		(3,578)		(3,438)
Net Carrying Amount	911		$ 911		980
Leases
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)			3 years 3 months
Gross Carrying Amount	796		$ 796		2,065
Accumulated Amortization	(512)		(512)		(912)
Net Carrying Amount	284		$ 284		1,153
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)			10 years 5 months 25 days
Gross Carrying Amount	15,448		$ 15,448		24,185
Accumulated Amortization	(5,861)		(5,861)		(7,868)
Net Carrying Amount	9,587		9,587		16,317
Definite-lived intangible asset impairment	3,400
Trademarks | Environmental Techniques
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired			$ 100
Non-competes
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)			1 year 7 months 9 days
Gross Carrying Amount	1,196		$ 1,196		1,308
Accumulated Amortization	(1,020)		(1,020)		(1,054)
Net Carrying Amount	176		$ 176		254
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)			10 years 1 month 20 days
Gross Carrying Amount	160,414		$ 160,414		187,554
Accumulated Amortization	(54,184)		(54,184)		(53,830)
Net Carrying Amount	106,230		106,230		133,724
Definite-lived intangible asset impairment	20,800
Customer Relationships | Environmental Techniques
Finite-Lived Intangible Assets [Line Items]
Finite intangible assets acquired			$ 1,700
Patents and acquired technology (2)
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives (Years)			9 years 4 months
Gross Carrying Amount	45,146		$ 45,146		66,222
Accumulated Amortization	(21,250)		(21,250)		(23,739)
Net Carrying Amount	23,896		$ 23,896		$ 42,483
Definite-lived intangible asset impairment	$ 16,800