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Fair Value Measurement and Fair Value of Financial Instruments (Increase (Decrease) in Value of Assets Measured on a Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Non-PCI impaired loans |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | $ (23,999) | $ 4,537 | $ (25,819) | $ 514
OREO |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (3) | 0 | (3) | 0
Investments in tax credit and other investments, net |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | (2,892) | 0 | (9,870) | 0
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 | (24,001) | 4,544 | (25,823) | 595
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 | 66 | 4 | (23)
Consumer lending | Real estate loan | Single-family residential | Non-PCI impaired loans |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | 0 | 0 | 0 | 15
Consumer lending | HELOCs | Non-PCI impaired loans |  |  |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |  |  |
Increase (decrease) in value of assets | $ 0 | $ (73) | $ 0 | $ (73)

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