Fair Value Measurement and Fair Value of Financial Instruments (Quantitative Information for Significant Unobservable Inputs) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Quantitative information
Derivative assets - Fair value	$ 330,316	$ 107,816
Fair Value, Measurements, Recurring
Quantitative information
Derivative assets - Fair value	330,316	107,816
Fair Value, Measurements, Recurring | Equity warrants
Quantitative information
Derivative assets - Fair value	1,414	1,951
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3)
Quantitative information
Derivative assets - Fair value	421	673
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity warrants
Quantitative information
Derivative assets - Fair value	421	673
Fair Value, Measurements, Nonrecurring | Non-PCI impaired loans
Quantitative information
Non-PCI Impaired loans	49,679	32,858
Fair Value, Measurements, Nonrecurring | OREO
Quantitative information
Assets, fair value disclosure	125
Fair Value, Measurements, Nonrecurring | Investments in tax credit and other investments, net
Quantitative information
Assets, fair value disclosure	3,076
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans
Quantitative information
Non-PCI Impaired loans	49,679	32,858
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Discounted cash flows
Quantitative information
Non-PCI Impaired loans	27,841	16,921
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Valuation Technique, Fair Value Of Collateral, Discount
Quantitative information
Non-PCI Impaired loans	1,014	2,751
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Valuation Technique, Fair Value Of Collateral, Contract Value
Quantitative information
Non-PCI Impaired loans	20,824	11,499
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost
Quantitative information
Non-PCI Impaired loans		$ 1,687
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | OREO
Quantitative information
Assets, fair value disclosure	125
Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Investments in tax credit and other investments, net
Quantitative information
Assets, fair value disclosure	$ 3,076
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity warrants | Black-Scholes option pricing model | Minimum
Quantitative information
Measurement input	39.00%	49.00%
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity warrants | Black-Scholes option pricing model | Maximum
Quantitative information
Measurement input	44.00%	52.00%
Equity volatility | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity warrants | Black-Scholes option pricing model | Weighted Average
Quantitative information
Measurement input	42.00%	51.00%
Liquidity discount | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity warrants
Quantitative information
Measurement input	47.00%	47.00%
Liquidity discount | Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity warrants | Weighted Average
Quantitative information
Measurement input	47.00%	47.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Discounted cash flows | Minimum
Quantitative information
Non-PCI impaired loans, measurement input	4.00%	4.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Discounted cash flows | Maximum
Quantitative information
Non-PCI impaired loans, measurement input	15.00%	7.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Discounted cash flows | Weighted Average
Quantitative information
Non-PCI impaired loans, measurement input	14.00%	6.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Valuation Technique, Fair Value Of Collateral, Discount | Minimum
Quantitative information
Non-PCI impaired loans, measurement input	8.00%	15.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Valuation Technique, Fair Value Of Collateral, Discount | Maximum
Quantitative information
Non-PCI impaired loans, measurement input	20.00%	50.00%
Discount | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Valuation Technique, Fair Value Of Collateral, Discount | Weighted Average
Quantitative information
Non-PCI impaired loans, measurement input	19.00%	21.00%
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost
Quantitative information
Non-PCI impaired loans, measurement input		8.00%
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | Non-PCI impaired loans | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost | Weighted Average
Quantitative information
Non-PCI impaired loans, measurement input		8.00%
Selling cost | 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
OREO, measurement input	0.08
Selling cost | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3) | OREO | Valuation Technique, Fair Value Of Valuation Technique, Fair Value Of Property, Selling Cost | Weighted Average
Quantitative information
OREO, measurement input	0.08