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Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Summary of Gain (Loss) Recognized and Amounts and Location of Income (Expense) and Gain (Loss) Reclassified Into Income For Interest Rate Contracts and Foreign Currency Contracts | The following table summarizes the gain (loss) recognized and the amounts and location of income (expense) and gain (loss) reclassified into income for interest rate contracts and foreign currency contracts for the years ended December 31, 2014, 2013 and 2012:
| Loss Recognized in Other Comprehensive Income |  | Income (Expense) and Gain (Loss) Reclassified into Income |  | Income Statement Caption
| Twelve Months Ended December 31, |
| 2014 |  | 2013 |  | 2012 |  | 2014 |  | 2013 |  | 2012 |
| (In thousands) |  |
Interest rate agreements | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | (7,223 | ) |  | $ | (7,430 | ) |  | $ | (7,637 | ) |  | Interest expense

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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