Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense	$ 1,500	$ 1,700	$ 2,858	$ 3,334
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets			3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of intangible assets			15 years