Goodwill and Intangible Assets - Intangible Assets and Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 656,037	$ 661,048
Accumulated Amortization	420,930	380,960
Net Carrying Amount	235,107	280,088
Intangible assets, gross	659,637	664,648
Intangible assets, net	238,707	283,688
Trademarks
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	3,600	3,600
Customer intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	560,316	568,643
Accumulated Amortization	353,189	319,827
Net Carrying Amount	207,127	248,816
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	35,695	36,296
Accumulated Amortization	24,830	21,575
Net Carrying Amount	10,865	14,721
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	38,436	38,141
Accumulated Amortization	26,838	23,568
Net Carrying Amount	11,598	14,573
Unpatented technologies
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,700	9,700
Accumulated Amortization	9,811	9,700
Net Carrying Amount	3,889
Drawings and manuals
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,558	3,000
Accumulated Amortization	1,758	2,142
Net Carrying Amount	800	858
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,332	5,268
Accumulated Amortization	4,504	4,148
Net Carrying Amount	$ 828	$ 1,120