Summary of Significant Accounting Policies (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Goodwill and other intangible assets
Goodwill, Gross	$ 10,703,000	$ 10,530,000
Goodwill, Net	10,703,000	10,530,000
Other intangible assets, Accumulated Amortization	(8,604,000)	(5,750,000)
Other intangible assets, Net	3,412,000
Total intangible assets, Gross	22,719,000	22,158,000
Total intangible assets, Net	14,115,000	16,408,000
Weighted-average life of finite-lived intangible assets	6 years
Aggregate amortization expense relating to intangible assets	2,600,000	2,100,000	1,700,000
Amortization relating to other intangible assets
2014	1,385,000
2015	1,090,000
2016	562,000
2017	375,000
Other intangible assets, Net	3,412,000
Technology, patents and trade names
Goodwill and other intangible assets
Other intangible assets, Gross	5,049,000	4,859,000
Other intangible assets, Accumulated Amortization	(3,730,000)	(2,825,000)
Other intangible assets, Net	1,319,000	2,034,000
Amortization relating to other intangible assets
Other intangible assets, Net	1,319,000	2,034,000
Customer relationships and non-compete agreements
Goodwill and other intangible assets
Other intangible assets, Gross	4,947,000	4,749,000
Other intangible assets, Accumulated Amortization	(2,886,000)	(2,232,000)
Other intangible assets, Net	2,061,000	2,517,000
Amortization relating to other intangible assets
Other intangible assets, Net	2,061,000	2,517,000
Contract-based
Goodwill and other intangible assets
Other intangible assets, Gross	2,020,000	2,020,000
Other intangible assets, Accumulated Amortization	(1,988,000)	(693,000)
Other intangible assets, Net	32,000	1,327,000
Amortization relating to other intangible assets
Other intangible assets, Net	$ 32,000	$ 1,327,000