Fair Value Measurements - Schedule of Estimated Fair Value of Financial Instruments where Fair Value Differs from Carrying Value (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Carrying Value
Financial assets:
Loans	$ 2,788,831	$ 2,432,890
Financial liabilities:
Time deposits	1,429,825	1,560,429
Advances from the FHLB	715,000	711,984
Senior notes	48,366	0
Carrying Value \| Subordinated notes
Financial liabilities:
Subordinated debt	29,922	29,795
Carrying Value \| Junior subordinated debentures
Financial liabilities:
Subordinated debt	64,178	64,178
Estimated Fair Value
Financial assets:
Loans	2,744,303	2,412,723
Financial liabilities:
Time deposits	1,425,014	1,559,565
Advances from the FHLB	710,634	729,053
Senior notes	49,594	0
Estimated Fair Value \| Subordinated notes
Financial liabilities:
Subordinated debt	27,914	26,530
Estimated Fair Value \| Junior subordinated debentures
Financial liabilities:
Subordinated debt	$ 62,960	$ 64,690

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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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 portion of borrowing from Federal Home Loan Bank (FHLBank).

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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