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Interest Rate Swap Agreements (Tables) | 12 Months Ended
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Dec. 31, 2011
Interest Rate Swap Agreements [Abstract] |
Interest rate swap agreements designated as hedge agreements |
Amount Designated as a Hedge |  |  | Nominal Amount |  |  | Effective Date |  | Pay Rate |  |  | Receive Rate |  |  | Expiration Date |  | Current Liability (1) |  |  | Long- Term Liability (2) |  |  | Estimated Total Fair Value at December 31, 2011 |
$ | 106,632 | (3) |  | $ | 125,000 |  |  | August 2007 |  |  | 4.9220% |  |  |  | 3-Month LIBOR |  |  | August 2012 |  | $ | 3,375 |  |  | $ | — |  |  | $ | 3,375 |
$ | 63,983 | (4) |  | $ | 75,000 |  |  | November 2008 |  |  | 3.6300% |  |  |  | 1-Month LIBOR |  |  | November 2012 |  |  | 2,124 |  |  |  | — |  |  |  | 2,124 |
$ | 175,000 |  |  | $ | 175,000 |  |  | December 2010 |  |  | 1.3975% |  |  |  | 1-Month LIBOR |  |  | September 2015 |  |  | 1,605 |  |  |  | 2,228 |  |  |  | 3,833 |
$ | 175,000 |  |  | $ | 175,000 |  |  | December 2010 |  |  | 1.4000% |  |  |  | 1-Month LIBOR |  |  | September 2015 |  |  | 1,632 |  |  |  | 2,271 |  |  |  | 3,903 |
$ | 100,000 |  |  | $ | 100,000 |  |  | November 2011 |  |  | 1.7150% |  |  |  | 1-Month LIBOR |  |  | April 2016 |  |  | 1,243 |  |  |  | 2,098 |  |  |  | 3,341 |
$ | 620,615 |  |  | $ | 650,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 9,979 |  |  | $ | 6,597 |  |  | $ | 16,576 |
(1) | Included in accrued other current liabilities on the consolidated balance sheet as of December 31, 2011.
(2) | Included in other long-term liabilities on the consolidated balance sheet as of December 31, 2011.
(3) | An additional $18,368 of this original $125,000 swap is no longer designated as a hedge as a result of the prepayment of the unextended portion of the Company’s term loan debt.
(4) | An additional $11,017 of this original $75,000 swap is no longer designated as a hedge as a result of the prepayment of the unextended portion of the Company’s term loan debt.

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- Definition Tabular disclosure of interest rate derivatives, including, but not limited to, the fair value of the derivatives, statement of financial position location, and statement of financial performance location of these instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 815 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 4C -Section 50 -URI http://asc.fasb.org/extlink&oid=6935481&loc=SL5624171-113959 + Details
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