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Derivatives (Details 2) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) company | Dec. 31, 2016 USD ($)
Derivative [Line Items] |  |
Derivative liabilities | $ 83,400 | $ 82,323
Derivative assets | 79,764 | 83,780
Derivatives designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional amount | 42,566 | 131,391
Derivative liabilities | 6,686 | 5,976
Derivative assets | 0 | 4,325
Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional amount | 9,723,734 | 8,507,660
Derivative liabilities | 76,714 | 76,347
Derivative assets | 79,764 | 79,455
Interest rate swaps on certificates of deposit | Derivatives designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional amount | 42,566 | 48,365
Derivative liabilities | 6,686 | 5,976
Derivative assets | 0 | 0
Foreign currency forward contracts | Derivatives designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional amount | 0 | 83,026
Derivative liabilities | 0 | 0
Derivative assets | 0 | 4,325
Interest rate swaps and options | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional amount | 8,172,811 | 7,668,482
Derivative liabilities | 63,551 | 65,131
Derivative assets | 64,254 | 67,578
Notional amount of derivative assets | 4,090,000 | 3,860,000
Notional amount of derivative liabilities | 4,090,000 | 3,810,000
Foreign exchange contracts | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional amount | 1,481,244 | 767,764
Derivative liabilities | 13,161 | 11,213
Derivative assets | 14,722 | 11,874
RPAs | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional amount | 69,679 | 71,414
Derivative liabilities | 2 | 3
Derivative assets | $ 2 | $ 3
Weighted average remaining maturity (in years) | 3 years 4 months | 3 years 8 months
RPAs | Derivatives not designated as hedging instruments | Long |  |
Derivative [Line Items] |  |
Notional amount | $ 48,200 | $ 48,300
Derivative liabilities | 2 | 3
Interest rate derivative exposure | 113 | 179
RPAs | Derivatives not designated as hedging instruments | Short |  |
Derivative [Line Items] |  |
Notional amount | 21,400 | 23,100
Derivative assets | 2 | 3
Warrants | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional amount | 0 | 0
Derivative liabilities | 0 | 0
Derivative assets | $ 786 | $ 0
Number of public companies in which warrants are held | company | 4 |

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + 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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