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Fair Value Measurement and Fair Value of Financial Instruments (Financial Assets and Liabilities Measurement on Recurring Basis) (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | $ 2,592,913 | $ 2,741,847
Derivative |  |
Derivative assets - Fair value | 242,876 | 107,816
Derivative asset, after netting | 198,673 | 62,670
Derivative liabilities - Fair value | 172,923 | 118,305
Derivative liability, after netting | 98,429 | 79,903
U.S. Treasury securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 326,535 | 564,815
U.S. government agency and U.S. government sponsored enterprise debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 241,967 | 217,173
U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 474,832 | 408,603
U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 843,574 | 946,693
Municipal securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 87,529 | 82,020
Non-agency commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 70,549 | 26,052
Non-agency residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 24,539 | 9,931
Corporate debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 11,156 | 10,869
Foreign bonds |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 484,416 | 463,048
Asset-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 27,816 | 12,643
Fair Value, Measurements, Recurring |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 2,592,913 | 2,741,847
Equity securities with readily determinable fair value | 31,423 | 31,209
Derivative |  |
Derivative assets - Fair value | 242,876 | 107,816
Derivative asset netting adjustments | (44,203) | (45,146)
Derivative asset, after netting | 198,673 | 62,670
Derivative liabilities - Fair value | 172,923 | 118,305
Derivative liability netting adjustment | (74,494) | (38,402)
Derivative liability, after netting | 98,429 | 79,903
Fair Value, Measurements, Recurring | Tax credit investments |  |
Investment securities available-for-sale |  |
Total investments in tax credit and other investments | 31,423 | 31,209
Fair Value, Measurements, Recurring | Interest rate contracts |  |
Derivative |  |
Derivative assets - Fair value | 190,388 | 69,818
Derivative liabilities - Fair value | 124,371 | 75,133
Fair Value, Measurements, Recurring | Foreign exchange contracts |  |
Derivative |  |
Derivative assets - Fair value | 27,849 | 21,624
Derivative liabilities - Fair value | 22,528 | 19,940
Fair Value, Measurements, Recurring | Credit contracts |  |
Derivative |  |
Derivative assets - Fair value | 3 | 1
Derivative liabilities - Fair value | 118 | 164
Fair Value, Measurements, Recurring | Equity contracts |  |
Derivative |  |
Derivative assets - Fair value | 1,985 | 1,951
Fair Value, Measurements, Recurring | Commodity contracts |  |
Derivative |  |
Derivative assets - Fair value | 22,651 | 14,422
Derivative liabilities - Fair value | 25,906 | 23,068
Fair Value, Measurements, Recurring | U.S. Treasury securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 326,535 | 564,815
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government sponsored enterprise debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 241,967 | 217,173
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 474,832 | 408,603
Fair Value, Measurements, Recurring | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 843,574 | 946,693
Fair Value, Measurements, Recurring | Municipal securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 87,529 | 82,020
Fair Value, Measurements, Recurring | Non-agency commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 70,549 | 26,052
Fair Value, Measurements, Recurring | Non-agency residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 24,539 | 9,931
Fair Value, Measurements, Recurring | Corporate debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 11,156 | 10,869
Fair Value, Measurements, Recurring | Foreign bonds |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 484,416 | 463,048
Fair Value, Measurements, Recurring | Asset-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 27,816 | 12,643
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 326,535 | 564,815
Equity securities with readily determinable fair value | 21,466 | 20,678
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative asset netting adjustments | 0 | 0
Derivative asset, after netting | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Derivative liability netting adjustment | 0 | 0
Derivative liability, after netting | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Tax credit investments |  |
Investment securities available-for-sale |  |
Total investments in tax credit and other investments | 21,466 | 20,678
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign exchange contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Credit contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commodity contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. Treasury securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 326,535 | 564,815
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agency and U.S. government sponsored enterprise debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Municipal securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-agency commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-agency residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Foreign bonds |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 2,266,378 | 2,177,032
Equity securities with readily determinable fair value | 9,957 | 10,531
Derivative |  |
Derivative assets - Fair value | 242,484 | 107,143
Derivative asset netting adjustments | (44,203) | (45,146)
Derivative asset, after netting | 198,281 | 61,997
Derivative liabilities - Fair value | 172,923 | 118,305
Derivative liability netting adjustment | (74,494) | (38,402)
Derivative liability, after netting | 98,429 | 79,903
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Tax credit investments |  |
Investment securities available-for-sale |  |
Total investments in tax credit and other investments | 9,957 | 10,531
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Interest rate contracts |  |
Derivative |  |
Derivative assets - Fair value | 190,388 | 69,818
Derivative liabilities - Fair value | 124,371 | 75,133
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign exchange contracts |  |
Derivative |  |
Derivative assets - Fair value | 27,849 | 21,624
Derivative liabilities - Fair value | 22,528 | 19,940
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Credit contracts |  |
Derivative |  |
Derivative assets - Fair value | 3 | 1
Derivative liabilities - Fair value | 118 | 164
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Equity contracts |  |
Derivative |  |
Derivative assets - Fair value | 1,593 | 1,278
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Commodity contracts |  |
Derivative |  |
Derivative assets - Fair value | 22,651 | 14,422
Derivative liabilities - Fair value | 25,906 | 23,068
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. Treasury securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government sponsored enterprise debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 241,967 | 217,173
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 474,832 | 408,603
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 843,574 | 946,693
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Municipal securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 87,529 | 82,020
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 70,549 | 26,052
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Non-agency residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 24,539 | 9,931
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Corporate debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 11,156 | 10,869
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Foreign bonds |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 484,416 | 463,048
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Asset-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 27,816 | 12,643
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Equity securities with readily determinable fair value | 0 | 0
Derivative |  |
Derivative assets - Fair value | 392 | 673
Derivative asset netting adjustments | 0 | 0
Derivative asset, after netting | 392 | 673
Derivative liabilities - Fair value | 0 | 0
Derivative liability netting adjustment | 0 | 0
Derivative liability, after netting | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Tax credit investments |  |
Investment securities available-for-sale |  |
Total investments in tax credit and other investments | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Interest rate contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Foreign exchange contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Credit contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Equity contracts |  |
Derivative |  |
Derivative assets - Fair value | 392 | 673
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Commodity contracts |  |
Derivative |  |
Derivative assets - Fair value | 0 | 0
Derivative liabilities - Fair value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. Treasury securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government sponsored enterprise debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | U.S. government agency and U.S. government sponsored enterprise mortgage-backed securities - Residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Municipal securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Non-agency commercial mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Non-agency residential mortgage-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Corporate debt securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Foreign bonds |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | 0 | 0
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) | Asset-backed securities |  |
Investment securities available-for-sale |  |
Available-for-sale debt securities, Fair Value | $ 0 | $ 0

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