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Fair Value Measurements and Fair Value of Financial Instruments, Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Financial assets [Abstract]    
HTM securities $ 706,291 $ 749,945
Carrying Amount [Member] | Level 1 [Member]    
Financial liabilities [Abstract]    
Subordinated debt 24,223 121,401
Carrying Amount [Member] | Level 2 [Member]    
Financial assets [Abstract]    
HTM securities 771,474 842,921
Financial liabilities [Abstract]    
Time deposits 1,592,147 1,442,505
Long-term debt 44,762 29,644
Junior subordinated debt 111,644 101,196
Carrying Amount [Member] | Level 3 [Member]    
Financial assets [Abstract]    
Net loans 11,460,060 9,863,654
Estimated Fair Value [Member] | Level 1 [Member]    
Financial liabilities [Abstract]    
Subordinated debt 23,506 118,693
Estimated Fair Value [Member] | Level 2 [Member]    
Financial assets [Abstract]    
HTM securities 706,291 749,945
Financial liabilities [Abstract]    
Time deposits 1,582,840 1,431,942
Long-term debt 44,919 29,439
Junior subordinated debt 97,111 105,763
Estimated Fair Value [Member] | Level 3 [Member]    
Financial assets [Abstract]    
Net loans $ 11,289,816 $ 9,458,786