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Leases - Supplemental Cash Flow Information Related to the Company's Leases (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Lease Cost [Abstract]        
Operating cash flows from operating leases $ 1,128 $ 1,240 $ 3,710 $ 3,600
Right-of-use assets obtained in exchange for operating lease obligations: $ 41,190 $ 864 $ 41,571 $ 12,815