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Leases - Schedule of Lease Assets and Related Lease Liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Right-of-use assets - cost $ 50,796 $ 50,477
Accumulated amortization (23,485) (20,871)
Finance lease right-of-use assets, net 27,311 29,606
Right-of-use assets - cost 7,340 3,934
Accumulated amortization (2,264) (1,891)
Operating lease right-of-use assets, net 5,076 2,043
Total lease assets 32,387 31,649
Finance lease liabilities 12,480 12,330
Operating lease liabilities 1,724 1,188
Finance lease liabilities 22,193 25,391
Operating lease liabilities 3,354 853
Total lease liabilities $ 39,751 $ 39,762