Other Intangibles (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	$ 151,345,000	$ 153,418,000
Finite-Lived Intangible Assets, Accumulated Amortization	79,693,000	70,098,000
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	93,572,000	94,790,000
Finite-Lived Intangible Assets, Accumulated Amortization	58,447,000	50,832,000
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	3,212,000	3,160,000
Finite-Lived Intangible Assets, Accumulated Amortization	3,212,000	3,160,000
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	9,650,000	9,823,000
Finite-Lived Intangible Assets, Accumulated Amortization	5,588,000	4,870,000
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	6,060,000	6,358,000
Finite-Lived Intangible Assets, Accumulated Amortization	5,234,000	5,266,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	7,571,000	7,510,000
Finite-Lived Intangible Assets, Accumulated Amortization	7,212,000	5,970,000
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	0	0
Indefinite-lived Intangible Assets	$ 31,280,000	$ 31,777,000