Goodwill and Other Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Goodwill and other intangible assets
Goodwill, Gross	$ 10,699	$ 10,703
Goodwill, Net	10,699	10,703
Other intangible assets, Accumulated Amortization	(8,968)	(8,604)
Total intangible assets, Gross	22,705	22,719
Total intangible assets, Net	13,737	14,115
Technology, patents and trade names
Goodwill and other intangible assets
Other intangible assets, Gross	5,044	5,049
Other intangible assets, Accumulated Amortization	(3,924)	(3,730)
Other intangible assets, Net	1,120	1,319
Customer relationships and non-compete agreements
Goodwill and other intangible assets
Other intangible assets, Gross	4,942	4,947
Other intangible assets, Accumulated Amortization	(3,024)	(2,886)
Other intangible assets, Net	1,918	2,061
Contract-based
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