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	Sep. 30, 2023	Dec. 31, 2022
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	$ 35,133	$ 72,614
Tax credit investments
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	1,038
Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	33,929	71,391
Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	1,204	1,223
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Tax credit investments
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Significant Other Observable Inputs (Level 2) | Tax credit investments
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	0
Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Significant Other Observable Inputs (Level 2) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	35,133	72,614
Significant Unobservable Inputs (Level 3) | Tax credit investments
Fair Value, Assets Measured on a Nonrecurring Basis
Assets, fair value disclosure	1,038
Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	33,929	71,391
Significant Unobservable Inputs (Level 3) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	1,204	1,223
Commercial and industrial (“C&I”) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	22,788	40,011
Commercial and industrial (“C&I”) | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Commercial and industrial (“C&I”) | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
Commercial and industrial (“C&I”) | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	22,788	40,011
CRE | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure		31,380
CRE | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure		0
CRE | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure		0
CRE | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure		31,380
Construction and land | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	11,141
Construction and land | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0
Construction and land | Significant Other Observable Inputs (Level 2) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0
Construction and land | Significant Unobservable Inputs (Level 3) | Commercial lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	11,141
HELOCs | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	1,204	1,223
HELOCs | Quoted Prices in Active Markets for Identical Assets (Level 1) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
HELOCs | Significant Other Observable Inputs (Level 2) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	0	0
HELOCs | Significant Unobservable Inputs (Level 3) | Consumer lending
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-investment, fair value disclosure	$ 1,204	$ 1,223