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Cash and Cash Equivalents - Schedule of Cash and Cash Equivalents (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash and cash equivalents [abstract]        
Checking and saving accounts $ 99,286 $ 118,367    
Time deposits of no more than ninety days 19,500 40,000    
Cash on hand 279 365    
Cash and cash equivalents $ 119,065 $ 158,732 $ 156,158 $ 238,792