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Derivative Financial Instruments - Fair Value Hedges (Details) - Interest rate swaps - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Net gains and losses recognized in income related to derivatives in fair value hedging relationships |  |  |  |  |
Net gains (losses) recognized on fair value hedges | $ 18 | $ (67) | $ (302) | $ (243) |
Minimum | Fair value hedges |  |  |  |  |
Fair hedges carried |  |  |  |  |
Fixed interest rate (as a percent) | 2.59% |  | 2.59% |  |
Maximum | Fair value hedges |  |  |  |  |
Fair hedges carried |  |  |  |  |
Fixed interest rate (as a percent) | 3.44% |  | 3.44% |  |
Net interest income | Fair value hedges |  |  |  |  |
Net gains and losses recognized in income related to derivatives in fair value hedging relationships |  |  |  |  |
Expense recorded | $ (65) | (171) | $ (172) | (369) |
Noninterest income |  |  |  |  |
Net gains and losses recognized in income related to derivatives in fair value hedging relationships |  |  |  |  |
Gains (losses) recognized on derivatives | 408 | (95) | 958 | 124 |
Gains (losses) recognized on hedged item | (325) | 199 | (1,088) | 2 |
Net gains (losses) recognized on fair value hedges (ineffective portion) | 83 | $ 104 | (130) | $ 126 |
Derivatives designated as hedging instruments |  |  |  |  |
Fair hedges carried |  |  |  |  |
Notional amounts | 193,022 |  | 193,022 |  | $ 194,687
Derivatives designated as hedging instruments | Fair value hedges |  |  |  |  |
Fair hedges carried |  |  |  |  |
Notional amounts | 43,000 |  | 43,000 |  | 44,700
Positive fair value | 300 |  | 300 |  | 0
Fair value losses | $ 0 |  | $ 0 |  | $ 500

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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 Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition The premium (cost) of a hedge, net of any cash received on settlement during the period. + References No definition available. + Details
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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Amount of gain (loss)recognized in the income statement from the hedging ineffectiveness of a fair value hedge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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- Definition Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 + Details
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- Definition Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets. + References Reference 1: 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=77997519&loc=d3e13433-108611 + Details
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