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Other Assets - Real Estate Owned (Details)
$ in Thousands
Mar. 31, 2022
USD ($)
property
Dec. 31, 2021
USD ($)
property
Mar. 31, 2021
USD ($)
property
Dec. 31, 2020
USD ($)
Real Estate Properties [Line Items]        
Number of real estate owned properties | property 492 553 835  
Real estate owned $ 145,568 $ 156,223 $ 220,393 $ 249,699
Residential whole loans acquired through foreclosure ordered in lieu 144,500      
Carrying Value        
Real Estate Properties [Line Items]        
Mortgage loans in process of foreclosure 76,300      
Estimated Fair Value        
Real Estate Properties [Line Items]        
Mortgage loans in process of foreclosure $ 330,600