Goodwill and Identifiable Intangible Assets, Net (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Identifiable Intangible Assets, Net
Gross Book Value	$ 85,819	$ 82,925
Accumulated Amortization	(44,740)	(37,259)
Future amortization expense of identifiable intangible assets
2016	5,956
2017	4,640
2018	3,850
2019	3,430
2020	3,102
Thereafter	20,101
Total	41,079
Customer relationships
Identifiable Intangible Assets, Net
Gross Book Value	53,334	50,440
Accumulated Amortization	$ (31,960)	(26,287)
Customer relationships | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	2 years
Customer relationships | Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	15 years
Backlog
Identifiable Intangible Assets, Net
Gross Book Value	$ 1,600	1,600
Accumulated Amortization	$ (1,412)	(829)
Backlog | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	1 year
Backlog | Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	2 years
Noncompete agreements
Identifiable Intangible Assets, Net
Gross Book Value	$ 2,890	2,890
Accumulated Amortization	$ (2,890)	(2,868)
Noncompete agreements | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	2 years
Noncompete agreements | Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	7 years
Tradenames
Identifiable Intangible Assets, Net
Gross Book Value	$ 27,995	27,995
Accumulated Amortization	$ (8,478)	$ (7,275)
Tradenames | Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	2 years
Tradenames | Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	25 years