Fair Value Measurement and Fair Value of Financial Instruments - Schedule of Quantitative Information about Significant Unobservable Inputs Used in the Valuation of Level 3 Fair Value Measurements on Nonrecurring (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Quantitative information
Affordable housing partnership, tax credit and CRA investments, net	$ 983,976	$ 969,492
Fair Value, Measurements, Nonrecurring
Quantitative information
Total loans held-for-investment	27,950	19,251
OREO	2,668	13,035
Affordable housing partnership, tax credit and CRA investments, net		953
Level 3 | Fair Value, Measurements, Nonrecurring
Quantitative information
Total loans held-for-investment	27,950	19,251
OREO	2,668	13,035
Affordable housing partnership, tax credit and CRA investments, net		953
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral, discount
Quantitative information
Total loans held-for-investment	$ 24,123	$ 4,516
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral, discount | Minimum | Discount
Quantitative information
Loans held-for-investment, measurement input	55.00%	75.00%
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral, discount | Maximum | Discount
Quantitative information
Loans held-for-investment, measurement input	75.00%	100.00%
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral, discount | Weighted Average | Discount
Quantitative information
Loans held-for-investment, measurement input	65.00%	75.00%
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral, selling cost
Quantitative information
Total loans held-for-investment	$ 3,827	$ 14,735
OREO	$ 2,668	$ 13,035
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral, selling cost | Selling cost
Quantitative information
Loans held-for-investment, measurement input	8.00%	8.00%
OREO, measurement input	0.08	0.08
Level 3 | Fair Value, Measurements, Nonrecurring | Fair value of collateral, selling cost | Weighted Average | Selling cost
Quantitative information
Loans held-for-investment, measurement input	8.00%	8.00%
OREO, measurement input	0.08	0.08
Level 3 | Fair Value, Measurements, Nonrecurring | Individual analysis of each investment
Quantitative information
Affordable housing partnership, tax credit and CRA investments, net		$ 953