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Leases - Summary of Supplemental Cash Flow and Noncash Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Leases [Abstract]      
Operating cash flows from operating leases $ 9,419 $ 9,702  
Financing cash flows from finance leases 3,066 2,954 $ 2,889
Operating cash flows from finance leases 135 252  
Cash paid for lease liabilities 12,620 12,908  
Right-of-use assets obtained in exchange for new financing lease liabilities (net of disposals) (71) 6  
Rights-of-use assets obtained in exchange for new operating lease liabilities (net of disposals) $ 17,875 $ 13,242