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Derivative Financial Instruments - Cash Flow Hedges (Details) $ in Thousands | 2 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 30, 2018 derivative | Jun. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2018 USD ($) derivative | Jun. 30, 2019 USD ($) derivative
Cash Flow Hedges |  |  |  |  |
Effect of cash flow hedging relationships |  |  |  |  |
Pretax gains recognized in other comprehensive income on derivatives (effective portion) |  | $ 425 | $ 1,163 |  |
Pretax gain reclassified from accumulated other comprehensive income |  | 0 | 0 |  |
Interest rate swaps |  |  |  |  |
Cash flow hedges |  |  |  |  |
Recognized expenses related to the ineffective portion |  | 0 | 0 |  |
Interest rate swaps | Cash Flow Hedges |  |  |  |  |
Cash flow hedges |  |  |  |  |
Net interest expense on derivative |  | $ 400 | $ 900 |  |
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 |  |  |  | $ 41,317 | $ 23,545
Derivatives designated as hedging instruments | Interest rate swaps | Cash Flow Hedges |  |  |  |  |
Cash flow hedges |  |  |  |  |
Number of interest rate swaps | derivative | 2 |  |  | 2 |
Number of derivatives carried | derivative |  |  |  | 0 | 0
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 net gain (loss) relating to components of the gain (loss) on the cash flow hedging instrument excluded from the assessment of cash flow hedge effectiveness. Recognized in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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