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Subsequent Event - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Oct. 14, 2021
USD ($)
loan
Forecast    
Subsequent Event [Line Items]    
Gain on securitization of financial assets $ 4.0  
Subsequent Event    
Subsequent Event [Line Items]    
Number of loans securitized | loan   384
Agricultural mortgage loans with an aggregate outstanding principal balance   $ 302.7
Agricultural mortgage loans with an aggregate outstanding principal balance senior tranche   280.0
Agricultural mortgage loans with an aggregate outstanding principal balance, unguaranteed subordinate tranche   $ 22.7