Goodwill and Intangible Assets Intangible Assests (Excluding Goodwill) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	[1],[2]	$ 229,368		$ 229,368		$ 210,677
Finite-Lived Intangible Assets, Accumulated Amortization	[1],[2]	(115,677)		(115,677)		(104,673)
Amortization expense		4,572	$ 4,501	13,099	$ 13,465
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		17,300		17,300
Finite-Lived Intangible Assets, Amortization Expense, Year Two		15,500		15,500
Finite-Lived Intangible Assets, Amortization Expense, Year Three		14,300		14,300
Finite-Lived Intangible Assets, Amortization Expense, Year Four		13,500		13,500
Finite-Lived Intangible Assets, Amortization Expense, Year Five		13,400		13,400
Trademarks and trade names
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)		47,537		47,537		47,662
Unpatented technology
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		35,510		35,510		35,933
Finite-Lived Intangible Assets, Accumulated Amortization		(6,672)		(6,672)		(6,979)
Patents
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		7,780		7,780		7,809
Finite-Lived Intangible Assets, Accumulated Amortization		(6,716)		(6,716)		(6,213)
Trademarks and trade names
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		10,058		10,058		8,981
Finite-Lived Intangible Assets, Accumulated Amortization		(6,784)		(6,784)		(6,206)
Non-compete agreements
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		405		405		421
Finite-Lived Intangible Assets, Accumulated Amortization		(344)		(344)		(88)
Customer Relationships [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		161,863		161,863		154,945
Finite-Lived Intangible Assets, Accumulated Amortization		(94,652)		(94,652)		(84,776)
Land use rights
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross		13,752		13,752		2,588
Finite-Lived Intangible Assets, Accumulated Amortization		$ (509)		$ (509)		$ (411)

[1] Amounts include the impact of foreign currency translation. Fully amortized amounts are written off.

[2] The Company amortizes certain identifiable intangible assets mainly on a straight-line basis over their estimated useful lives, which range from one to 50 years.