Fair Value Measurements and Fair Value of Financial Instruments, Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financial assets [Abstract]
HTM securities	$ 781,868	$ 814,524
Carrying Amount [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	121,138	120,380
Carrying Amount [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	854,941	905,267
Financial liabilities [Abstract]
Time deposits	1,433,124	1,324,709
Long-term debt	29,682	29,796
Junior subordinated debt	101,196	101,196
Carrying Amount [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	9,791,254	9,539,684
Estimated Fair Value [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	117,140	113,757
Estimated Fair Value [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	781,868	814,524
Financial liabilities [Abstract]
Time deposits	1,424,694	1,285,999
Long-term debt	29,666	29,416
Junior subordinated debt	103,968	102,337
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	$ 9,536,670	$ 9,216,162