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Investment Securities - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Dec. 31, 2020
USD ($)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]      
Gains (losses) from sales of available-for-sale securities, net $ (2,000) $ 57,000 $ 4,000
Debt securities, HTM, allowance 0 0 3,000
Debt securities, AFS, allowance $ 2,000 2,000 0
Percentage of investment portfolio considered investment grade 99.00%    
Marketable securities, unrealized gain (loss) $ 8,102,000 $ 1,046,000  
Number of securities in loss position | security 2,094 954  
Asset Pledged as Collateral      
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]      
Pledged securities not separately reported $ 70,520,000 $ 80,810,000  
Agency MBS      
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]      
Debt securities, available-for-sale, transferred security, at carrying value 23,560,000 1,250,000 8,600,000
Debt securities, available-for-sale, unrealized gain (loss) (1,260,000) 12,000 120,000
ABS and municipal bonds      
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]      
Securities sold 4,590,000 12,820,000 2,650,000
Gains (losses) from sales of available-for-sale securities, net $ (2,000) $ 57,000 $ (4,000)
Minimum | Agency MBS      
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]      
Debt securities, available-for-sale, securities transferred, security term 1 year 1 year  
Maximum | Agency MBS      
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]      
Debt securities, available-for-sale, securities transferred, security term 37 years 36 years