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Other Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Interest receivable $ 37,646 $ 40,559
Collateral deposited under derivative agreements 27,890 28,320
Loan proceeds held by servicer 1,750 5,649
Other 1,596 112
Total $ 68,882 $ 74,640