Goodwill and Other Intangibles - Other Intangibles (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	$ 546,334
Foreign currency translation adjustments and other	(7,808)
Gross Asset Value, End of Period	538,526
Accumulated Amortization, Beginning of Period	(160,191)
Amortization	(20,509)
Foreign currency translation adjustments and other	3,232
Accumulated Amortization, End of Period	(177,468)
Net Book Value	361,058	$ 386,143
Customer lists and relationships
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	428,372
Foreign currency translation adjustments and other	(8,094)
Gross Asset Value, End of Period	420,278
Accumulated Amortization, Beginning of Period	(95,797)
Amortization	(17,453)
Foreign currency translation adjustments and other	1,994
Accumulated Amortization, End of Period	(111,256)
Net Book Value	309,022	332,575
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	18,453
Foreign currency translation adjustments and other	(304)
Gross Asset Value, End of Period	18,149
Accumulated Amortization, Beginning of Period	(8,176)
Amortization	0
Foreign currency translation adjustments and other	104
Accumulated Amortization, End of Period	(8,072)
Net Book Value	10,077	10,277
Patents and technology
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	55,801
Foreign currency translation adjustments and other	(1,217)
Gross Asset Value, End of Period	54,584
Accumulated Amortization, Beginning of Period	(35,248)
Amortization	(1,091)
Foreign currency translation adjustments and other	686
Accumulated Amortization, End of Period	(35,653)
Net Book Value	18,931	20,553
Other
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	43,708
Foreign currency translation adjustments and other	1,807
Gross Asset Value, End of Period	45,515
Accumulated Amortization, Beginning of Period	(20,970)
Amortization	(1,965)
Foreign currency translation adjustments and other	448
Accumulated Amortization, End of Period	(22,487)
Net Book Value	$ 23,028	$ 22,738