Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization		$ (75,608)	$ (68,771)
Net Carrying Amount		174,118	182,273
Gross Carrying Amount		$ 249,726	251,044
Licensing Agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives		4 years 4 months 3 days
Accumulated Amortization		$ (3,275)	(3,131)
Net Carrying Amount		618	777
Gross Carrying Amount		$ 3,893	3,908
Backlog
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives		0 years
Accumulated Amortization		$ 0	(4,731)
Net Carrying Amount		0	0
Gross Carrying Amount		$ 0	4,731
Leases
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives		11 years 5 months 5 days
Accumulated Amortization		$ (764)	(623)
Net Carrying Amount		1,301	1,444
Gross Carrying Amount		$ 2,065	2,067
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives		15 years 8 days
Accumulated Amortization		$ (6,262)	(5,199)
Net Carrying Amount		16,257	16,523
Gross Carrying Amount		$ 22,519	21,722
Non-competes
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives		2 years 5 months 8 days
Accumulated Amortization		$ (945)	(839)
Net Carrying Amount		265	301
Gross Carrying Amount		$ 1,210	1,140
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives		12 years 9 months
Accumulated Amortization		$ (41,967)	(32,196)
Net Carrying Amount		122,812	131,190
Gross Carrying Amount		$ 164,779	163,386
Patents and acquired technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Lives		13 years 11 months 24 days
Accumulated Amortization		$ (22,395)	(22,052)
Net Carrying Amount		32,865	32,038
Gross Carrying Amount		$ 55,260	$ 54,090
Schultz | Trademarks
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 700
Schultz | Non-competes
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	100
Schultz | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired	$ 2,300