Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 3,507	$ 2,718	$ 7,005	$ 5,433
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)			5 years 6 months
Leasehold benefits
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)			1 year 10 months 24 days
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)			4 years 6 months
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)			2 years
Trade names and trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Remaining amortization period (in years)			5 years 3 months 18 days