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Goodwill and Intangible Assets, Net - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]      
Percentage of estimated fair value in excess of carrying amount 8.00%    
Impairment of goodwill $ 0    
Amortization of intangible assets $ 4,206,000 $ 3,695,000 $ 2,269,000