Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Intangible asset amortization expense	$ 1,429	$ 1,673
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