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Derivative Financial Instruments - Cash Flow Hedges (Details) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) derivative
Cash Flow Hedges |  |  |
Effect of cash flow hedging relationships |  |  |
Pretax gains recognized in other comprehensive income on derivatives (effective portion) | $ 738 |  |
Pretax gain reclassified from accumulated other comprehensive income | 0 |  |
Interest rate swaps |  |  |
Cash flow hedges |  |  |
Recognized expenses related to the ineffective portion | 0 |  |
Interest rate swaps | Cash Flow Hedges |  |  |
Cash flow hedges |  |  |
Net interest expense on derivative | $ 500 |  |
Minimum | Interest rate swaps | Cash Flow Hedges |  |  |
Cash flow hedges |  |  |
Fixed interest rate (as a percent) |  |  | 2.98%
Maximum | Interest rate swaps | Cash Flow Hedges |  |  |
Cash flow hedges |  |  |
Fixed interest rate (as a percent) |  |  | 3.03%
Derivatives designated as hedging instruments | Interest rate swaps |  |  |
Cash flow hedges |  |  |
Notional amounts |  | $ 23,892 | $ 41,317
Derivatives designated as hedging instruments | Interest rate swaps | Cash Flow Hedges |  |  |
Cash flow hedges |  |  |
Number of derivatives carried | derivative |  |  | 2
Notional amounts |  |  | $ 150,000

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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 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 The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624177-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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