Loans and Allowance for Credit Losses - Allowance for loan losses by loan product and impairment methodology (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
General	$ 45,873	$ 44,473
Specific	10,371	35,710
PCD	11,179	21,422
Ending Balance	67,423	101,605	$ 67,780	$ 90,519
Bridge
Accounts, Notes, Loans and Financing Receivable [Line Items]
General	10,827	17,302
Specific	2,354	18,939
Ending Balance	13,181	36,241	40,319	49,905
Fixed rate
Accounts, Notes, Loans and Financing Receivable [Line Items]
General	5,971	7,884
Specific	1,293	5,714
Ending Balance	7,264	13,598	9,085	6,531
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
General	11,886	3,722
Specific	690	5,726
PCD	11,179	21,422
Ending Balance	23,755	30,870	373	17,334
SBA 7(a)
Accounts, Notes, Loans and Financing Receivable [Line Items]
General	14,596	12,679
Specific	5,983	5,188
Ending Balance	20,579	17,867	15,110	14,299
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
General	2,593	2,886
Specific	51	143
Ending Balance	$ 2,644	$ 3,029	$ 2,893	$ 2,450