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Derivative Financial Instruments
 3 Months Ended
Mar. 31, 2012
Derivative Financial Instruments  
Derivative Financial Instruments

13.   Derivative Financial Instruments

        From time to time, the Company seeks to offset its exposure to changing interest rates under its debt financing arrangements by entering into interest rate hedging contracts. The Company does not hold or issue derivative financial instruments for speculative purposes.

        In 2010, the Company entered into interest rate swap contracts as summarized in the table below:

 
   Notional
Amount 		  Paying   Receiving   Start Date   Expiration Date

Counterparty A

   $ 25.0     1.67 % 3-Month LIBOR   October 2010   October 2015

Counterparty A

   $ 25.0     1.65 % 3-Month LIBOR   October 2010   October 2015

Counterparty B

   $ 25.0     1.59 % 3-Month LIBOR   October 2010   October 2015

Counterparty B

   $ 25.0     2.14 % 3-Month LIBOR   October 2010   October 2017

        During 2010 and 2011, the Company entered into a series of treasury rate lock contracts with a total notional value of $175.0 million which were settled in February 2011 and October 2011 for a net pre-tax loss of $0.7 million. These contracts were intended to hedge the risks associated with changes in interest rates on a fixed-rate debt issuance that is anticipated to occur prior to the end of the second quarter of 2012. The net loss on these contracts is reflected as a component of Other comprehensive income.

        The Company's derivative contracts contain provisions that may require the Company or the counterparties to post collateral based upon the current fair value of the derivative contracts. As of March 31, 2012, the Company had posted collateral of $3.9 million related to its interest rate swap contracts.

        The Company records all derivative instruments on the balance sheet at fair value. As cash flow hedges, the effective portion of the unrealized gain or loss on the derivative instruments is recorded in accumulated other comprehensive income as a separate component of stockholders' equity. Hedge effectiveness is measured by comparing the present value of the cumulative change in the expected future variable cash flows of the hedged contract with the present value of the cumulative change in the expected future variable cash flows of the hedged item. To the extent that the critical terms of the hedged item and the derivative are not identical, hedge ineffectiveness would be reported in earnings as Interest expense. Hedge ineffectiveness was not material in any periods presented. The Company does not expect to reclassify any material portion of the losses related to these derivative contracts into earnings in the next twelve months.

        The following summarizes the location and amount of derivative instrument gains and losses (before taxes) reported in the Consolidated Statements of Comprehensive Income:

 
   For the Three Months
Ended March 31, 		 
 
   2011   2012  

Cash Flow Hedges

              

Interest rate swaps

   $ 0.6   $ (0.1 )

Treasury rate locks

     0.5     —  
           

Total

   $ 1.1   $ (0.1 )
           

        The following summarizes the location and fair values of derivative instruments on the Consolidated Balance Sheets:

 
   December 31,
2011 		  March 31,
2012 		 

Cash Flow Hedges

              

Interest rate swaps(1)

   $ (2.9 ) $ (3.0 )
           
(1)
Presented within Other long-term liabilities.