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Restructuring - Schedule of Reconciliation of Restructuring Liability (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring And Related Activities [Abstract]      
Balance at beginning of period $ 1,568 $ 185  
Plus: Amounts charged to cost and expense 6,229 6,014 $ 7,261
Less: Amounts paid (3,611) (4,631)  
Balance at end of period $ 4,186 $ 1,568 $ 185