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Fair Value - Carrying Amount and Fair Value of Other Significant Financial Instruments Not Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Financial Assets    
Debt securities held-to-maturity $ 747,004 $ 638,640
Time deposits with other banks 5,975 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Financial Assets    
Debt securities held-to-maturity 0 0
Time deposits with other banks 0  
Loans, net 0 0
Financial Liabilities    
Deposit liabilities 0 0
Subordinated debt 0 0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2)    
Financial Assets    
Debt securities held-to-maturity 709,492 627,398
Time deposits with other banks 5,933  
Loans, net 0 0
Financial Liabilities    
Deposit liabilities 0 0
Subordinated debt 69,416 69,348
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)    
Financial Assets    
Debt securities held-to-maturity 0 0
Time deposits with other banks 0  
Loans, net 6,423,158 5,907,447
Financial Liabilities    
Deposit liabilities 9,238,260 8,067,995
Subordinated debt 0 0
Carrying Value | Fair Value, Measurements, Recurring    
Financial Assets    
Debt securities held-to-maturity 747,004 638,640
Time deposits with other banks 5,975  
Loans, net 6,352,984 5,833,271
Financial Liabilities    
Deposit liabilities 9,243,768 8,067,589
Subordinated debt $ 71,716 $ 71,646