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Segment Information - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Operating Segments [Line Items]      
Revenue $ 313,564 $ 338,160 $ 425,940
ROW (Segment) [Member]      
Disclosure Of Operating Segments [Line Items]      
Revenue 96,718 89,206 108,869
ROW (Segment) [Member] | One major customer [Member]      
Disclosure Of Operating Segments [Line Items]      
Revenue $ 33,494 $ 23,118 $ 37,197
Percentage of entity's revenue from major customer 10.68% 6.84% 8.73%