Summary of Significant Accounting Policies (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill and Other Intangible Assets
Cumulative impairment loss related to Medicomp, Inc. goodwill write-off			$ 6,200,000
Goodwill and other intangible assets
Goodwill, Gross	10,530,000	8,123,000
Goodwill, Net	10,530,000	8,123,000
Other intangible assets, Accumulated Amortization	(5,750,000)	(3,805,000)
Other intangible assets, Net	5,878,000
Total intangible assets, Gross	22,158,000	25,892,000
Total intangible assets, Net	16,408,000	22,087,000
Weighted-average life of finite-lived intangible assets	6 years 6 months
Aggregate amortization expense relating to intangible assets	2,100,000	1,700,000	1,600,000
Amortization relating to other intangible assets
2013	1,957,000
2014	1,540,000
2015	1,185,000
2016	656,000
2017	450,000
Thereafter	90,000
Other intangible assets, Net	5,878,000
Technology, patents and tradenames
Goodwill and other intangible assets
Other intangible assets, Gross	4,859,000	4,766,000
Other intangible assets, Accumulated Amortization	(2,825,000)	(1,999,000)
Other intangible assets, Net	2,034,000	2,767,000
Amortization relating to other intangible assets
Other intangible assets, Net	2,034,000	2,767,000
Customer relationships and non-compete agreements
Goodwill and other intangible assets
Other intangible assets, Gross	4,749,000	4,653,000
Other intangible assets, Accumulated Amortization	(2,232,000)	(1,658,000)
Other intangible assets, Net	2,517,000	2,995,000
Amortization relating to other intangible assets
Other intangible assets, Net	2,517,000	2,995,000
Contract-based
Goodwill and other intangible assets
Other intangible assets, Gross	2,020,000	8,350,000
Other intangible assets, Accumulated Amortization	(693,000)	(148,000)
Other intangible assets, Net	1,327,000	8,202,000
Amortization relating to other intangible assets
Other intangible assets, Net	$ 1,327,000	$ 8,202,000