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Interest and Loan Related Income, Net - Summary of Interest and Loan Related Income (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Interest and Fee Income, Loans and Leases [Abstract]        
Interest and loan related income, gross $ 91,448 $ 73,311 $ 253,581 $ 235,651
Amortization of loan origination costs 0 (10,818) 0 (37,464)
Interest and loan related income, net $ 91,448 $ 62,493 $ 253,581 $ 198,187