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Investment Securities - Textual (Details) - USD ($)
number in Thousands
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Debt Securities, Trading $ 0   $ 0
Concentration, debt securities 0.00%   0.00%
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest $ 0   $ 0
Debt Securities, Held-to-maturity, Nonaccrual 0   0
Debt Securities, Held-to-maturity, 90 Days or More Past Due, Still Accruing 0   0
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Excluding Accrued Interest 0    
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss 4,600,000   4,800,000
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss 2,300,000   $ 2,400,000
Debt Securities, Available-for-Sale, Accrued Interest Writeoff 0 $ 0  
Debt Securities, Held-to-Maturity, Accrued Interest, Writeoff $ 0 $ 0  
Common Stock, Shares, Outstanding 35,047,800   35,106,697
Gain (Loss) on Disposition of Stock in Subsidiary $ 1,600,000    
Common Class B      
Common Stock, Shares, Outstanding     6,549
Common Stock, Value, Outstanding     $ 0