Fair Value Measurements and Fair Value of Financial Instruments, Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financial assets [Abstract]
HTM securities	$ 814,100	$ 735,260
Carrying Amount [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	100,000	100,000
Carrying Amount [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	929,541	733,210
Financial liabilities [Abstract]
Time deposits	445,673	501,472
Long-term debt	3,322	13,995
Junior subordinated debt	101,196	101,196
Carrying Amount [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	7,808,071	7,407,289
Estimated Fair Value [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	96,025	107,402
Estimated Fair Value [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	814,100	735,260
Financial liabilities [Abstract]
Time deposits	428,762	500,717
Long-term debt	3,066	14,260
Junior subordinated debt	96,107	107,569
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	$ 7,538,178	$ 7,530,768