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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]          
Amortization of intangible assets $ 11,468 $ 8,855 $ 23,969 $ 10,538 $ 10,538
Amortization income from unfavorable lease commitments     $ 366