Fair Value Measurement and Fair Value of Financial Instruments - Carrying Amounts of Assets That Were Still Held and Had Fair Value Changes Measured on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	$ 45,892	$ 72,614
Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	44,688	71,391
Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	22,035	40,011
Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	22,653	31,380
Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	1,204	1,223
Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	1,204	1,223
Level 1
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 1 | Investments in qualified affordable housing partnerships, tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Investments in qualified affordable housing partnerships, tax credit and other investments, net	0
Level 1 | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 1 | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 1 | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 1 | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 1 | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 2
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 2 | Investments in qualified affordable housing partnerships, tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Investments in qualified affordable housing partnerships, tax credit and other investments, net	0
Level 2 | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 2 | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 2 | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 2 | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 2 | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	0	0
Level 3
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	45,892	72,614
Level 3 | Valuation Technique, Fair Value Of Collateral, Contract Value
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	3,009
Level 3 | Investments in qualified affordable housing partnerships, tax credit and other investments, net
Fair Value, Assets Measured on a Nonrecurring Basis
Investments in qualified affordable housing partnerships, tax credit and other investments, net	868
Level 3 | Commercial Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	44,688	71,391
Level 3 | Commercial Lending | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	22,035	40,011
Level 3 | Commercial Lending | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	22,653	31,380
Level 3 | Consumer Lending
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	1,204	1,223
Level 3 | Consumer Lending | HELOCs
Fair Value, Assets Measured on a Nonrecurring Basis
Total loans held-for-investment	$ 1,204	$ 1,223