Goodwill and Other Intangibles (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, cost	$ 51,524,000		$ 51,330,000
Other intangible assets, accumulated amortization	(19,019,000)		(18,112,000)
Other intangible assets, net	32,505,000		33,218,000
Amortization of Deferred Charges [Abstract]
Amortization expense of other intangible assets	900,000	800,000
Products and Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, cost	39,115,000		38,825,000
Other intangible assets, accumulated amortization	(13,877,000)		(13,232,000)
Other intangible assets, net	25,238,000		25,593,000
Trademarks & Brand Names [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, cost	5,048,000		5,048,000
Other intangible assets, accumulated amortization	(1,714,000)		(1,634,000)
Other intangible assets, net	3,334,000		3,414,000
Patents and Patent Applications [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, cost	4,848,000		4,789,000
Other intangible assets, accumulated amortization	(1,615,000)		(1,523,000)
Other intangible assets, net	3,233,000		3,266,000
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, cost	906,000		906,000
Other intangible assets, accumulated amortization	(816,000)		(809,000)
Other intangible assets, net	90,000		97,000
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, cost	1,607,000		1,762,000
Other intangible assets, accumulated amortization	(997,000)		(914,000)
Other intangible assets, net	$ 610,000		$ 848,000