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Derivative Instruments (Tables) | 9 Months Ended
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Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions | The notional amounts, fixed and variable interest rates and maturities of the interest rate swap agreements are as follows:
| Tranche A |  | Tranche B |  | Tranche C |  | Tranche D |  | Tranche E
Notional amount at inception (in thousands) | $300,000 |  | $200,000 |  | $400,000 |  | $150,000 |  | $250,000
Amortization | N/A |  | N/A |  | 5% annually |  | N/A |  | N/A
Maturity date | 12/30/2022 |  | 12/30/2022 |  | 12/31/2020 |  | 12/31/2020 |  | 12/31/2018
Fixed interest rate | 2.204% |  | 2.212% |  | 1.108% |  | 1.125% |  | 0.896%
Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Statements of Income | The following table presents information on the location and amounts of interest rate swap gains and losses:
(In thousands) |  |  |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
Derivatives Not Designated as Hedging Instruments | Location of Gain (Loss) Recognized in Income Statement |  | 2018 |  | 2017 |  | 2018 |  | 2017
Interest rate swap agreements – unrealized portion |  | Net unrealized gain (loss) on financial instruments |  | $ | 2,340 |  |  | $ | (150 | ) |  | $ | 19,792 |  |  | $ | (849 | )
Interest rate swap agreements – realized portion |  | Financing interest income (expense) |  | $ | 1,866 |  |  | $ | 377 |  |  | $ | 3,542 |  |  | $ | (243 | )

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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