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Other Assets - Additional Information (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Loans and Leases Receivable Disclosure [Line Items]    
Face amount of loan $ 23.9 $ 23.9
Commercial    
Loans and Leases Receivable Disclosure [Line Items]    
Weighted average coupon rate 8.59% 8.65%