Fair Value Measurements and Fair Values of Financial Instruments, Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Financial assets [Abstract]
HTM securities	$ 812,647	$ 735,260
Carrying Amount [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	98,000	100,000
Carrying Amount [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	919,517	733,210
Financial liabilities [Abstract]
Time deposits	433,772	501,472
Long-term debt	4,815	13,995
Junior subordinated debt	101,196	101,196
Carrying Amount [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	8,049,909	7,407,289
Estimated Fair Value [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	92,883	107,402
Estimated Fair Value [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	812,647	735,260
Financial liabilities [Abstract]
Time deposits	413,868	500,717
Long-term debt	4,539	14,260
Junior subordinated debt	98,372	107,569
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	$ 7,840,350	$ 7,530,768