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Fair Value Measurements and Fair Value of Financial Instruments, Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financial assets [Abstract]
HTM securities	$ 793,319	$ 814,524
Carrying Amount [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	120,628	120,380
Carrying Amount [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	890,863	905,267
Financial liabilities [Abstract]
Time deposits	1,368,136	1,324,709
Long-term debt	29,759	29,796
Junior subordinated debt	101,196	101,196
Carrying Amount [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	9,576,040	9,539,684
Estimated Fair Value [Member] | Level 1 [Member]
Financial liabilities [Abstract]
Subordinated debt	116,563	113,757
Estimated Fair Value [Member] | Level 2 [Member]
Financial assets [Abstract]
HTM securities	793,319	814,524
Financial liabilities [Abstract]
Time deposits	1,348,934	1,285,999
Long-term debt	29,315	29,416
Junior subordinated debt	103,202	102,337
Estimated Fair Value [Member] | Level 3 [Member]
Financial assets [Abstract]
Net loans	$ 9,173,300	$ 9,216,162

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- Definition

Fair value of junior subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

+ References

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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-Topic 470
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-Name Accounting Standards Codification
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Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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