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Fair Value Measurement and Fair Value of Financial Instruments (Fair Value Adjustments of Assets Measured on a Nonrecurring Basis) (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Fair value adjustments of assets | $ 13,979 | $ 49
OREO |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Fair value adjustments of assets | 0 | (285)
Commercial lending | Commercial and industrial (“C&I”) | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Fair value adjustments of assets | 13,899 | 32
Commercial lending | Commercial real estate (“CRE”) | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Fair value adjustments of assets | 95 | (64)
Consumer lending | Real estate loan | Single-family | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Fair value adjustments of assets | (15) | 82
Consumer lending | Other consumer | Non-PCI impaired loans |  |
Fair Value, Assets Measured on a Nonrecurring Basis |  |
Fair value adjustments of assets | $ 0 | $ (1)

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