Loans Held for Investment - Amortized cost basis of the loans held for investment modified for borrowers (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) loan
TDRs, Non-covered loans
Total amortized cost of financing receivable modified			$ 2,806
Total Modifications as a percentage of portfolio segment	0.70%	0.90%
Number of TDRs granted in preceding twelve months for which payment was at least 30 days past due | loan			2
Interest Rate Reduction
TDRs, Non-covered loans
Total amortized cost of financing receivable modified		$ 510
Payment Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 52,535	66,785
Payment Delay
TDRs, Non-covered loans
Total amortized cost of financing receivable modified		$ 2,776
Combination Term Extension and Rate Reduction
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 456
Commercial Real Estate
TDRs, Non-covered loans
Number of TDRs granted in preceding twelve months for which payment was at least 30 days past due | loan			1
Commercial Real Estate | Non-owner occupied
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment	0.10%	1.80%
Commercial Real Estate | Non-owner occupied | Payment Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 1,424	$ 33,680
Commercial Real Estate | Owner occupied
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment		0.20%
Commercial Real Estate | Owner occupied | Payment Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 468	$ 2,183	$ 2,072
Commercial and industrial
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment	3.30%	1.30%
Commercial and industrial | Interest Rate Reduction
TDRs, Non-covered loans
Total amortized cost of financing receivable modified		$ 510
Commercial and industrial | Payment Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 50,116	17,921	$ 734
Commercial and industrial | Payment Delay
TDRs, Non-covered loans
Total amortized cost of financing receivable modified		$ 2,776
Commercial and industrial | Combination Term Extension and Rate Reduction
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	456
Commercial and industrial | Auto note financing industry subsector | Payment Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 23,000
Construction and land development
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment	0.00%	1.30%
Construction and land development | Payment Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 359	$ 13,001
Residential | Payment Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 168