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Leases - Schedule of Lease Assets and Related Lease Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Leases [Abstract]    
Right-of-use assets cost $ 2,033 $ 50,477
Accumulated amortization (1,262) (20,871)
Finance lease right-of-use assets, net 771 29,606
Right-of-use assets cost 100,710 3,934
Accumulated amortization (6,655) (1,891)
Operating lease right-of-use assets, net 94,055 2,043
Total lease assets 94,826 31,649
Finance lease liabilities 15 12,330
Operating lease liabilities 10,831 1,188
Finance lease liabilities 5 25,391
Operating lease liabilities 91,478 853
Total lease liabilities $ 102,329 $ 39,762