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Derivative Financial Instruments - Free-Standing, Contingent Features and Counterparty Credit Risk (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 96 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Mar. 31, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2015 | Dec. 31, 2016
Derivative financial instruments |  |  |  |  |  |  |
Counterparty credit risk adjustments | $ 0 | $ 100 |  | $ 100 | $ 200 |  |
Visa | Class B shares |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Number of shares sold |  | 0 | 274,000 | 0 | 274,000 | 0 |
Interest rate swaps |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Collateral thresholds for derivative agreements with credit risk related contingent features | 500 |  |  | $ 500 |  |  |
Derivatives Not Designated as Hedging Instruments | Interest rate swaps |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Notional Amount | 1,727,957 |  |  | 1,727,957 |  |  | $ 1,297,101
Net interest expense on derivative | $ 200 | $ 300 |  | $ 700 | $ 800 |  |
Derivatives Not Designated as Hedging Instruments | Interest rate swaps | Minimum |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Fixed interest rate (as a percent) | 1.24% |  |  | 1.24% |  |  | 0.77%
Derivatives Not Designated as Hedging Instruments | Interest rate swaps | Maximum |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Fixed interest rate (as a percent) | 5.33% |  |  | 5.33% |  |  | 4.90%
Derivatives Not Designated as Hedging Instruments | Interest rate swaps | Customer swap program |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Notional Amount | $ 1,600,000 |  |  | $ 1,600,000 |  |  | $ 1,200,000
Upfront fees on the dealer swap | 1,300 | $ 700 |  | 5,900 | $ 4,300 |  |
Derivative asset value | 19,700 |  |  | 19,700 |  |  | 16,000
Derivative liability value | 13,800 |  |  | 13,800 |  |  | 16,000
Derivatives Not Designated as Hedging Instruments | Interest rate swaps | Other assets |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Positive fair value, derivative asset | 19,743 |  |  | 19,743 |  |  | 15,982
Derivatives Not Designated as Hedging Instruments | Interest rate swaps | Other liabilities |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Fair value loss (derivative liability) | 15,503 |  |  | 15,503 |  |  | 18,299
Derivatives Not Designated as Hedging Instruments | Funding Swap (Visa Derivative) |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Notional Amount | 41,536 |  |  | 41,536 |  |  | 37,143
Derivatives Not Designated as Hedging Instruments | Funding Swap (Visa Derivative) | Other liabilities |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  |  |
Fair value loss (derivative liability) | $ 5,975 |  |  | $ 5,975 |  |  | $ 7,460

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- Definition Amount of net credit risk valuation adjustment during the period to derivative assets and derivative liabilities to properly reflect the credit quality of the counterparties. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 + Details
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