Goodwill and Other Intangibles Other Intangibles (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period		$ 461,685
Acquisitions	[1]	47,189
Foreign currency translation adjustments and other		12,892
Gross Asset Value, End of Period		521,766
Accumulated Amortization, Beginning of Period		(107,121)
Amortization		(5,740)
Foreign currency translation adjustments and other		1,452
Accumulated Amortization, End of Period		(111,409)
Net Book Value		410,357	$ 354,564
Customer lists and relationships
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period		387,893
Acquisitions	[1]	1,717
Foreign currency translation adjustments and other		10,340
Gross Asset Value, End of Period		399,950
Accumulated Amortization, Beginning of Period		(49,165)
Amortization		(4,801)
Foreign currency translation adjustments and other		(1,164)
Accumulated Amortization, End of Period		(55,130)
Net Book Value		344,820	338,728
Trade names and trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period	[2]	16,514
Acquisitions	[1]	0
Foreign currency translation adjustments and other		264
Gross Asset Value, End of Period	[2]	16,778
Accumulated Amortization, Beginning of Period	[2]	(7,952)
Amortization		0
Foreign currency translation adjustments and other		(94)
Accumulated Amortization, End of Period	[2]	(8,046)
Net Book Value	[2]	8,732	8,562
Patents and technology
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period		38,434
Acquisitions	[1]	25,555
Foreign currency translation adjustments and other		514
Gross Asset Value, End of Period		64,503
Accumulated Amortization, Beginning of Period		(31,683)
Amortization		(413)
Foreign currency translation adjustments and other		(503)
Accumulated Amortization, End of Period		(32,599)
Net Book Value		31,904	6,751
Other
Finite-Lived Intangible Assets [Line Items]
Gross Asset Value, Beginning of Period		18,844
Acquisitions	[1]	19,917
Foreign currency translation adjustments and other		1,774
Gross Asset Value, End of Period		40,535
Accumulated Amortization, Beginning of Period		(18,321)
Amortization		(526)
Foreign currency translation adjustments and other		3,213
Accumulated Amortization, End of Period		(15,634)
Net Book Value		$ 24,901	$ 523

[1] Represents preliminary purchase price adjustments for the Jiangli New Materials acquisition and the acquisition of the remaining equity interest in Salmag. See Note 2, “Acquisitions,” for additional information.

[2] Balances as of March 31, 2017 and December 31, 2016 include only indefinite-lived intangible assets.