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Derivative and Hedging Activities, Derivative Instruments Not Designated as Hedging Instruments (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
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Not Designated as Hedging Instrument | Trading assets | Interest rate-related instruments — customer and mirror |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | $ 2,668,542 | $ 2,183,687
Derivative, Fair Value, Net | 62,708 | 28,494
Not Designated as Hedging Instrument | Trading assets | Foreign currency exchange forwards |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 143,551 | 124,851
Derivative, Fair Value, Net | 3,317 | 2,495
Not Designated as Hedging Instrument | Trading assets | Commodity contracts |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 419,459 | 457,868
Derivative, Fair Value, Net | 66,894 | 38,686
Not Designated as Hedging Instrument | Trading liabilities | Interest rate-related instruments — customer and mirror |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 2,668,542 | 2,183,687
Derivative, Fair Value, Net | (62,141) | (28,035)
Not Designated as Hedging Instrument | Trading liabilities | Foreign currency exchange forwards |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 136,177 | 118,094
Derivative, Fair Value, Net | (3,091) | (2,339)
Not Designated as Hedging Instrument | Trading liabilities | Commodity contracts |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 419,458 | 457,108
Derivative, Fair Value, Net | (66,380) | (37,286)
Not Designated as Hedging Instrument | Other assets | Interest rate lock commitments (mortgage) |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 335,070 | 222,736
Derivative, Fair Value, Net | 3,287 | 1,538
Not Designated as Hedging Instrument | Other assets | Purchased options (time deposit) |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 25,511 | 31,063
Derivative, Fair Value, Net | 1,027 | 1,175
Not Designated as Hedging Instrument | Other liabilities | Forward commitments (mortgage) |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 312,003 | 164,567
Derivative, Fair Value, Net | (919) | (313)
Not Designated as Hedging Instrument | Other liabilities | Written options (time deposit) |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 25,511 | 31,063
Derivative, Fair Value, Net | (1,027) | (1,175)
Designated as Hedging Instrument | Other assets | interest rate product [Member] |  |
Derivative Instruments Not Designated as Hedging Instruments [Abstract] |  |
Notional Amount | 500,000 | 0
Derivative, Fair Value, Net | $ 2,396 | $ 0

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13433-108611 + Details
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- References No definition available. + Details
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