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Other Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Interest receivable $ 41,860 $ 35,581
Collateral deposited under derivative agreements 35,540 17,090
Collateral deposited under secured debt arrangements 26,262 0
Other 207 45
Total $ 103,869 $ 52,716