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Leases - Summary of Other Information Under Operating Lease (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]    
Operating cash flows used for operating leases $ 23,038 $ 22,735
Leased assets obtained in exchange for new operating lease liabilities $ 20,109 $ 7,491