Fair Value of Assets and Liabilities - Fair Value Estimates for Financial Instruments by Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financial assets:
Securities available-for-sale	$ 104,238	$ 108,083
Securities held-to-maturity	2,643	2,913
Carrying Amounts
Financial assets:
Cash and cash equivalents	250,852	321,576
Time deposits in banks	4,118	5,858
Securities available-for-sale	104,238	108,083
Securities held-to-maturity	2,720	3,077
Loans held for sale	2,910	11,464
Loans held for investment, net of allowance for credit losses	3,422,982	3,047,288
FHLB stock and other investments	24,112	21,801
Interest rate swap	0	10
Financial liabilities:
Interest rate swap	0	10
Time deposits	491,008	466,572
Subordinated notes	73,859	73,749
Other borrowings	0	170,000
Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets:
Cash and cash equivalents	250,852	321,576
Time deposits in banks	4,118	5,858
Fair Value | Significant Other Observable Inputs (Level 2)
Financial assets:
Securities available-for-sale	104,238	108,083
Loans held for sale	3,222	12,626
Interest rate swap	0	10
Financial liabilities:
Interest rate swap	0	10
Time deposits	490,613	465,205
Other borrowings	0	170,000
Fair Value | Significant Unobservable Inputs (Level 3)
Financial assets:
Securities held-to-maturity	2,643	2,913
Loans held for investment, net of allowance for credit losses	3,317,617	2,891,925
Financial liabilities:
Subordinated notes	$ 73,335	$ 72,693