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Restructuring Charges - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restructuring charges $ 1,299 $ 2,615 $ 6,104 $ 13,257
Other Accrued Expenses [Member]        
Restructuring charges 1,300 2,600    
Selling, General and Administrative Expenses [Member]        
Severance expenses $ 4,600 $ 2,300 $ 7,900