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Fair Value Measurement and Fair Value of Financial Instruments (Increase (Decrease) in Fair Value of Assets Measured on a Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets |  | $ (2,810)
Impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | $ (19,208) |
Investments in tax credit and other investments, net |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | 150 | (6,978)
Other nonperforming assets |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | (300) | 0
Commercial lending | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets |  | (2,732)
Commercial lending | Impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | (21,506) |
Commercial lending | Commercial and industrial (“C&I”) | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets |  | (2,734)
Commercial lending | Commercial and industrial (“C&I”) | Impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | (21,501) |
Commercial lending | Commercial real estate (“CRE”) | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets |  | 2
Commercial lending | Commercial real estate (“CRE”) | Impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | (5) |
Consumer lending | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets |  | (78)
Consumer lending | Impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | 2,298 |
Consumer lending | HELOCs | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets |  | (78)
Consumer lending | HELOCs | Impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | (193) |
Consumer lending | Other consumer | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets |  | $ 0
Consumer lending | Other consumer | Impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Increase (decrease) in value of assets | $ 2,491 |

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