Fair Value Measurements and Fair Value of Financial Instruments, Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Financial assets [Abstract]
HTM securities	$ 780,490	$ 814,524
Carrying Amount [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	120,880	120,380
Carrying Amount [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	878,909	905,267
Financial liabilities [Abstract]
Time deposits	1,404,797	1,324,709
Long-term debt	29,721	29,796
Junior subordinated debt	101,196	101,196
Carrying Amount [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	9,737,030	9,539,684
Estimated Fair Value [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	113,768	113,757
Estimated Fair Value [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	780,490	814,524
Financial liabilities [Abstract]
Time deposits	1,384,422	1,285,999
Long-term debt	29,531	29,416
Junior subordinated debt	103,563	102,337
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	$ 9,366,639	$ 9,216,162