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Accumulated Other Comprehensive Income (Loss) ("AOCI/L") - Schedule of Components of Accumulated Other Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]    
Accumulated other comprehensive income (loss), unrealized gain (loss) before reclassification, net of tax $ (1) $ 462
Accumulated other comprehensive income (loss), reclassification of AOCI/L to income, net of tax $ (73)