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Fair Value Measurements - Schedule of Estimated Fair Value of Financial Instruments where Fair Value Differs from Carrying Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Financial assets:    
Debt securities held to maturity, carrying value $ 234,369 $ 242,101
Debt securities held to maturity, fair value 209,546 217,609
Carrying Value    
Financial assets:    
Loans 3,482,426 3,314,553
Financial liabilities:    
Time deposits 1,450,532 1,119,510
Advances from the FHLB 770,000 906,486
Junior subordinated debentures 64,178 64,178
Carrying Value | Senior notes    
Financial liabilities:    
Senior notes 59,368 59,210
Carrying Value | Subordinated notes    
Financial liabilities:    
Junior subordinated debentures 29,369 29,284
Estimated Fair Value    
Financial assets:    
Loans 3,369,283 3,181,696
Financial liabilities:    
Time deposits 1,437,522 1,099,294
Advances from the FHLB 760,912 873,852
Junior subordinated debentures 63,299 64,182
Estimated Fair Value | Senior notes    
Financial liabilities:    
Senior notes 55,652 58,755
Estimated Fair Value | Subordinated notes    
Financial liabilities:    
Junior subordinated debentures $ 28,481 $ 28,481