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Fair Value Measurements - Summary of difference between aggregate fair value and aggregate unpaid principal balance (Details) - Residential mortgage-backed securities - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Fair Value $ 25,504 $ 47,218
Aggregate Unpaid Principal Balance 25,304 46,623
Difference 200 595
Loans 90 or more days past due 0 0
Loans in nonaccrual status $ 0 $ 0