Basis of Preparation - Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 0	$ 0	$ 3,070	$ 0
Amortization expense	3,810	3,342	10,130	9,947
Gross carrying amount, finite-lived assets	224,914		224,914		163,319
Accumulated amortization, finite-lived assets	(75,498)		(75,498)		(65,116)
Indefinite-lived intangible assets	45,215		45,215		42,350
Changes in goodwill:
Balance as of January 1, 2012			288,770
Foreign currency adjustments			(177)
Balance as of September 30, 2012	387,242		387,242
For the Year ending December 31,
2012	15,100		15,100
2013	18,900		18,900
2014	17,600		17,600
2015	15,900		15,900
2016	14,100		14,100
Trademarks and trade names [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	45,215		45,215		39,280
In-process research and development [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	0		0		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 years
Gross carrying amount, finite-lived assets	41,461		41,461		18,113
Accumulated amortization, finite-lived assets	(10,305)		(10,305)		(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 years
Gross carrying amount, finite-lived assets	8,980		8,980		9,080
Accumulated amortization, finite-lived assets	(6,914)		(6,914)		(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 years
Gross carrying amount, finite-lived assets	9,281		9,281		5,638
Accumulated amortization, finite-lived assets	(2,261)		(2,261)		(1,818)
Customer relations [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Estimated useful life of finite-lived intangilbe assets (in year)			13 years
Gross carrying amount, finite-lived assets	165,192		165,192		130,488
Accumulated amortization, finite-lived assets	$ (56,018)		$ (56,018)		$ (48,840)