Basis of Preparation - Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 3,070	$ 0	$ 3,070	$ 0
Amortization expense	3,250	3,288	6,320	6,605
Gross carrying amount, finite-lived assets	163,136		163,136		163,319
Accumulated amortization, finite-lived assets	(71,642)		(71,642)		(65,116)
Indefinite-lived intangible assets	39,087		39,087		42,350
Changes in goodwill:
Balance as of January 1, 2012			288,770
Foreign currency adjustments			(520)
Balance as of June 30, 2012	288,250		288,250
Future estimated amortization expense:
2012			11,300
2013			10,700
2014			10,700
2015			10,700
2016			10,700
2017			10,700
Trademarks and trade names [Member]
Schedule of Finite-lived and Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	39,087		39,087		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
Gross carrying amount, finite-lived assets	17,992		17,992		18,113
Accumulated amortization, finite-lived assets	(9,855)		(9,855)		(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		8,978		9,080
Accumulated amortization, finite-lived assets	(6,696)		(6,696)		(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	5,678		5,678		5,638
Accumulated amortization, finite-lived assets	(1,977)		(1,977)		(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	130,488		130,488		130,488
Accumulated amortization, finite-lived assets	$ (53,114)		$ (53,114)		$ (48,840)