Other Intangibles (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	$ 149,023,000	$ 149,404,000
Finite-Lived Intangible Assets, Accumulated Amortization	90,396,000	86,820,000
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	92,050,000	92,637,000
Finite-Lived Intangible Assets, Accumulated Amortization	68,206,000	65,158,000
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	1,419,000	1,393,000
Finite-Lived Intangible Assets, Accumulated Amortization	1,419,000	1,393,000
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	9,944,000	9,916,000
Finite-Lived Intangible Assets, Accumulated Amortization	7,510,000	7,191,000
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	6,286,000	6,107,000
Finite-Lived Intangible Assets, Accumulated Amortization	5,781,000	5,568,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	7,541,000	7,702,000
Finite-Lived Intangible Assets, Accumulated Amortization	7,480,000	7,510,000
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	0	0
Indefinite-lived Intangible Assets	$ 31,783,000	$ 31,649,000