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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Impairment charges $ 1,511 $ 1,511  
Amortization of intangible assets 43,521 45,743 $ 35,681
Amortization income from unfavorable lease commitments $ 885 $ 811 $ 569