Loans and Allowance for Credit Losses - PCD Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Non-credit related discount	$ (7,200)	$ (13,200)
Spirit of Texas Bancshares, Inc.
Financing Receivable, Credit Quality Indicator [Line Items]
Unpaid principal balance	74,851
PCD allowance for credit loss at acquisition	(9,622)
Non-credit related discount	(1,377)
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price, Total	63,852
Spirit of Texas Bancshares, Inc. | Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Unpaid principal balance	8,258
PCD allowance for credit loss at acquisition	(6,433)
Non-credit related discount	(378)
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price, Total	1,447
Spirit of Texas Bancshares, Inc. | Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Unpaid principal balance	66,534
PCD allowance for credit loss at acquisition	(3,187)
Non-credit related discount	(998)
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price, Total	62,349
Spirit of Texas Bancshares, Inc. | Credit cards
Financing Receivable, Credit Quality Indicator [Line Items]
Unpaid principal balance	0
PCD allowance for credit loss at acquisition	0
Non-credit related discount	0
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price, Total	0
Spirit of Texas Bancshares, Inc. | Other Consumer and Other
Financing Receivable, Credit Quality Indicator [Line Items]
Unpaid principal balance	59
PCD allowance for credit loss at acquisition	(2)
Non-credit related discount	(1)
Financing Receivable, Purchased with Credit Deterioration, Amount at Purchase Price, Total	$ 56