Loans Held for Investment - Amortized cost basis of the loans held for investment modified for borrowers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment	0.30%	0.50%
Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 17,511	$ 41,571
Payment Delay
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 5,777	$ 3,000
Commercial real estate | Non-owner occupied
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment		2.10%
Commercial real estate | Non-owner occupied | Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified		$ 37,972
Commercial real estate | Owner occupied
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment	0.30%	0.20%
Commercial real estate | Owner occupied | Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 491	$ 2,235
Commercial real estate | Owner occupied | Payment Delay
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 3,882
Commercial and industrial
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment	1.10%	0.30%
Commercial and industrial | Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 16,797	$ 1,364
Commercial and industrial | Payment Delay
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 166	$ 3,000
Construction and land development
TDRs, Non-covered loans
Total Modifications as a percentage of portfolio segment	0.20%
Construction and land development | Term Extension
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 223
Construction and land development | Payment Delay
TDRs, Non-covered loans
Total amortized cost of financing receivable modified	$ 1,729