Goodwill and Other Intangible Assets (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Goodwill and other intangible assets
Goodwill, Gross	$ 10,678,000	$ 10,678,000	$ 8,123,000
Goodwill, Net	10,678,000	10,678,000	8,123,000
Other intangible assets, Accumulated Amortization	(4,442,000)	(4,442,000)	(3,805,000)
Total intangible assets, Gross	21,506,000	21,506,000	25,892,000
Total intangible assets, Net	17,064,000	17,064,000	22,087,000
Amortization relating to other intangible assets
2013		1,551,000
2014		1,487,000
2015		1,176,000
2016		672,000
2017		475,000
Thereafter		300,000
Total		5,661,000
Technology, patents and tradenames
Goodwill and other intangible assets
Other intangible assets, Gross	5,058,000	5,058,000	4,766,000
Other intangible assets, Accumulated Amortization	(2,370,000)	(2,370,000)	(1,999,000)
Other intangible assets, Net	2,688,000	2,688,000	2,767,000
Customer relationships and non-compete agreements
Goodwill and other intangible assets
Other intangible assets, Gross	4,520,000	4,520,000	4,653,000
Other intangible assets, Accumulated Amortization	(1,867,000)	(1,867,000)	(1,658,000)
Other intangible assets, Net	2,653,000	2,653,000	2,995,000
Contract-based
Goodwill and other intangible assets
Other intangible assets, Gross	1,250,000	1,250,000	8,350,000
Other intangible assets, Accumulated Amortization	(205,000)	(205,000)	(148,000)
Other intangible assets, Net	1,045,000	1,045,000	8,202,000
Impairment charge	$ 6,800,000	$ 6,800,000