Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Goodwill and other intangible assets
Goodwill, Gross	$ 10,362	$ 10,703
Goodwill, Net	10,362	10,703
Other intangible assets, Accumulated Amortization	(9,118)	(8,604)
Total intangible assets, Gross	23,617	22,719
Total intangible assets, Net	14,499	14,115
Technology, Patents and Trade Names [Member]
Goodwill and other intangible assets
Other intangible assets, Gross	6,676	5,049
Other intangible assets, Accumulated Amortization	(4,049)	(3,730)
Other intangible assets, Net	2,627	1,319
Amortization relating to other intangible assets
Finite-Lived Intangible Assets, Net	2,627	1,319
Customer Relationships and Non Compete Agreements [Member]
Goodwill and other intangible assets
Other intangible assets, Gross	4,559	4,947
Other intangible assets, Accumulated Amortization	(3,049)	(2,886)
Other intangible assets, Net	1,510	2,061
Amortization relating to other intangible assets
Finite-Lived Intangible Assets, Net	1,510	2,061
Finite-Lived Contract Based Intangible Assets [Member]
Goodwill and other intangible assets
Other intangible assets, Gross	2,020	2,020
Other intangible assets, Accumulated Amortization	(2,020)	(1,988)
Other intangible assets, Net		32
Amortization relating to other intangible assets
Finite-Lived Intangible Assets, Net		$ 32