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Accounts Receivable, Net - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Receivables [Abstract]      
Tenant improvement receivable from lessor $ 0.2 $ 2.0  
Bad debt expense $ 1.9 $ 5.5 $ 2.7