Goodwill and Intangible Assets Finite-Lived Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assests Useful Life	13 years 219 days
Finite-Lived Intangible Assets, Gross	$ 219,424	$ 222,031
Finite-Lived Intangible Assets, Accumulated Amortization	(95,158)	(80,330)
Amortization expense	19,230	14,792	13,376
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	17,800
Finite-Lived Intangible Assets, Amortization Expense, Year Two	16,200
Finite-Lived Intangible Assets, Amortization Expense, Year Three	14,300
Finite-Lived Intangible Assets, Amortization Expense, Year Four	13,400
Finite-Lived Intangible Assets, Amortization Expense, Year Five	12,700
Unpatented Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assests Useful Life	16 years
Finite-Lived Intangible Assets, Gross	43,133	45,078
Finite-Lived Intangible Assets, Accumulated Amortization	(11,776)	(11,286)
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assests Useful Life	11 years
Finite-Lived Intangible Assets, Gross	7,904	9,880
Finite-Lived Intangible Assets, Accumulated Amortization	(5,397)	(6,664)
Product Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assests Useful Life	9 years
Finite-Lived Intangible Assets, Gross	9,244	9,068
Finite-Lived Intangible Assets, Accumulated Amortization	(4,525)	(2,712)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite Lived Intangible Assests Useful Life	13 years
Finite-Lived Intangible Assets, Gross	159,143	158,005
Finite-Lived Intangible Assets, Accumulated Amortization	$ (73,460)	$ (59,668)