Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Intangible assets
Total	$ 33,199		$ 33,199		$ 36,438
Amortization expense of intangible assets	1,615	$ 1,719	3,239	$ 3,370
Estimated future amortization expense for intangible assets
2016 (remaining six months)	3,238		3,238
2017	6,165		6,165
2018	5,719		5,719
2019	5,511		5,511
2020	3,112		3,112
Thereafter	9,454		9,454
Tradename
Intangible assets
Total	13,455		$ 13,455		$ 15,019
Tradename | Minimum
Intangible assets
Amortization Period					3 years
Tradename | Maximum
Intangible assets
Amortization Period			10 years
Non-compete agreements
Intangible assets
Total	1,178		$ 1,178		$ 1,424
Non-compete agreements | Minimum
Intangible assets
Amortization Period			2 years
Non-compete agreements | Maximum
Intangible assets
Amortization Period			5 years
Customer relationships
Intangible assets
Total	$ 18,566		$ 18,566		$ 19,995
Customer relationships | Minimum
Intangible assets
Amortization Period			3 years
Customer relationships | Maximum
Intangible assets
Amortization Period			15 years