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Derivatives
 3 Months Ended
Mar. 31, 2012
Derivatives [Abstract]  
Derivatives

8. Derivatives

We are exposed to risks such as changes in interest rates, commodity prices and foreign currency exchange rates. We employ a variety of practices to manage these risks, including operating and financing activities and, where deemed appropriate, the use of derivative instruments. Derivative instruments are used only for risk management purposes and not for speculation or trading, and are not used to address risks related to foreign currency rates. We record derivative instruments as assets or liabilities on the balance sheet at fair value.

On June 12, 2006, we entered into an interest rate swap agreement with Goldman Sachs Capital Markets, to hedge against interest rate risks related to our variable rate U.S. revolving credit facility. The interest rate swap was terminated in March of 2011. Due to the termination of the swap in fiscal 2011, in addition to there being no activity in the current period, the fair value of the swap as of March 31, 2012 and December 31, 2011 was zero. Changes associated with the ineffective interest rate swap recognized in the Consolidated Statement of Operations for the period from January 1, 2011 to April 2, 2011 was approximately $1.8 million of income and are comprised of amortization of the remaining accumulated other comprehensive loss of the ineffective swap of $0.4 million offset by income of $2.2 million related to reducing the fair value of the ineffective interest rate swap liability to zero.