Basis of Preparation - Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Amortization expense	$ 3,070	$ 3,317
Gross carrying amount, finite-lived assets	163,495		163,319
Accumulated amortization, finite-lived assets	(68,536)		(65,116)
Indefinite-lived intangible assets	42,375		42,350
Changes in goodwill:
Balance as of January 1, 2012	288,770
Foreign currency adjustments	666
Balance as of March 31, 2012	289,436
Future estimated amortization expense:
2012	13,300
2013	10,800
2014	10,800
2015	10,800
2016	10,800
2017	10,800
Trademarks and trade names [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	39,305		39,280
In-process research and development [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	3,070		3,070
Unpatented technology [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangilbe assets (in year)	9
Gross carrying amount, finite-lived assets	18,229		18,113
Accumulated amortization, finite-lived assets	(9,562)		(9,024)
Patents [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangilbe assets (in year)	10
Gross carrying amount, finite-lived assets	8,978		9,080
Accumulated amortization, finite-lived assets	(6,482)		(5,434)
Product names [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangilbe assets (in year)	14
Gross carrying amount, finite-lived assets	5,674		5,638
Accumulated amortization, finite-lived assets	(1,858)		(1,818)
Customer relationships [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangilbe assets (in year)	13
Gross carrying amount, finite-lived assets	130,614		130,488
Accumulated amortization, finite-lived assets	$ (50,634)		$ (48,840)