Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Intangible assets
Total	$ 48,655		$ 48,655		$ 32,841
Amortization expense of intangible assets	2,600	$ 1,800	6,184	$ 5,015
Estimated future amortization expense for intangible assets
2017 (remaining three months)	2,505		2,505
2018	9,741		9,741
2019	9,393		9,393
2020	6,650		6,650
2021	5,413		5,413
Thereafter	14,953		14,953
Tradename
Intangible assets
Total	10,918		$ 10,918		11,754
Tradename | Minimum
Intangible assets
Amortization Period			3 years	3 years
Tradename | Maximum
Intangible assets
Amortization Period			10 years	10 years
Customer relationships
Intangible assets
Total	36,306		$ 36,306		20,136
Customer relationships | Minimum
Intangible assets
Amortization Period			3 years	3 years
Customer relationships | Maximum
Intangible assets
Amortization Period			15 years	15 years
Non-compete agreements
Intangible assets
Total	1,186		$ 1,186		$ 951
Non-compete agreements | Minimum
Intangible assets
Amortization Period			2 years	2 years
Non-compete agreements | Maximum
Intangible assets
Amortization Period			5 years	5 years
Other
Intangible assets
Amortization Period			3 years
Total	$ 245		$ 245