Other Intangibles (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	$ 149,420,000	$ 149,404,000
Finite-Lived Intangible Assets, Accumulated Amortization	88,356,000	86,820,000
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	92,408,000	92,637,000
Finite-Lived Intangible Assets, Accumulated Amortization	66,592,000	65,158,000
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	1,382,000	1,393,000
Finite-Lived Intangible Assets, Accumulated Amortization	1,382,000	1,393,000
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	10,028,000	9,916,000
Finite-Lived Intangible Assets, Accumulated Amortization	6,621,000	6,390,000
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	6,261,000	6,107,000
Finite-Lived Intangible Assets, Accumulated Amortization	5,657,000	5,568,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	7,163,000	7,407,000
Finite-Lived Intangible Assets, Accumulated Amortization	8,104,000	8,311,000
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	0	0
Indefinite-lived Intangible Assets	$ 32,178,000	$ 31,944,000