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Goodwill and Intangible Assets, Net - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]      
Goodwill accumulated impairment losses $ 0   $ 0
Amortization expense $ 3,515,000 $ 1,596,000