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Fair Value Measurement and Fair Value of Financial Instruments (Quantitative Information for Significant Unobservable Inputs) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Quantitative information
Derivative assets - Fair value	$ 484,184	$ 602,754
Other nonperforming assets
Quantitative information
Assets, fair value disclosure
Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	484,184	602,754
Fair Value, Measurements, Recurring | Equity contracts
Quantitative information
Derivative assets - Fair value	220	858
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Quantitative information
Derivative assets - Fair value	215	273
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts
Quantitative information
Derivative assets - Fair value	215	273
Fair Value, Measurements, Nonrecurring
Quantitative information
Loans held-for-investment, Fair value	126,984	189,862
Fair Value, Measurements, Nonrecurring | OREO
Quantitative information
Assets, fair value disclosure		15,824
Fair Value, Measurements, Nonrecurring | Investments in tax credit and other investments, net
Quantitative information
Assets, fair value disclosure		3,140
Fair Value, Measurements, Nonrecurring | Other nonperforming assets
Quantitative information
Assets, fair value disclosure	391
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Quantitative information
Loans held-for-investment, Fair value	126,984	189,862
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Discounted cash flows
Quantitative information
Loans held-for-investment, Fair value	64,919	104,783
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Discount
Quantitative information
Loans held-for-investment, Fair value	38,537	22,207
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Contract Value
Quantitative information
Loans held-for-investment, Fair value		15,879
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost
Quantitative information
Loans held-for-investment, Fair value	23,528	46,993
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | OREO
Quantitative information
Assets, fair value disclosure		15,824
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | OREO | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost
Quantitative information
Assets, fair value disclosure		15,824
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Investments in tax credit and other investments, net
Quantitative information
Assets, fair value disclosure		3,140
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Investments in tax credit and other investments, net | Valuation Technique, Individual Analysis
Quantitative information
Assets, fair value disclosure		$ 3,140
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Other nonperforming assets
Quantitative information
Assets, fair value disclosure	$ 0
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts | Black-Scholes option pricing model | Minimum
Quantitative information
Equity contracts, measurement input	44.00%	46.00%
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts | Black-Scholes option pricing model | Maximum
Quantitative information
Equity contracts, measurement input	54.00%	61.00%
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts | Black-Scholes option pricing model | Weighted Average
Quantitative information
Equity contracts, measurement input	49.00%	53.00%
Liquidity discount | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts
Quantitative information
Equity contracts, measurement input	47.00%	47.00%
Liquidity discount | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts | Weighted Average
Quantitative information
Equity contracts, measurement input	47.00%	47.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Minimum
Quantitative information
Loans held-for-investment, measurement input	4.00%	3.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Maximum
Quantitative information
Loans held-for-investment, measurement input	15.00%	15.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Discounted cash flows | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	7.00%	11.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Discount | Minimum
Quantitative information
Loans held-for-investment, measurement input	15.00%	10.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Discount | Maximum
Quantitative information
Loans held-for-investment, measurement input	75.00%	26.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Collateral, Discount | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	41.00%	15.00%
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost
Quantitative information
Loans held-for-investment, measurement input	8.00%
OREO, measurement input		0.08
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost | Minimum
Quantitative information
Loans held-for-investment, measurement input		7.00%
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost | Maximum
Quantitative information
Loans held-for-investment, measurement input		26.00%
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost | Weighted Average
Quantitative information
Loans held-for-investment, measurement input	8.00%	10.00%
OREO, measurement input		0.08

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