Fair Value Measurements

6 Months Ended

Jun. 30, 2011

Fair Value Measurements

Fair Value Measurements

13. Fair Value Measurements

The Company measures certain financial assets and liabilities at fair value on a recurring basis, including interest rate swap liabilities related to interest rate swap derivatives based on the mark-to-market position of the Company's interest rate swap positions and other observable interest rates (see Note 12, "Derivative Financial Instruments", for more information on these interest rate swaps).

Accounting guidance on fair value establishes a hierarchy for those instruments measured at fair value which distinguishes between assumptions based on market data (observable inputs) and the Company's own assumptions (unobservable inputs). The hierarchy consists of three levels:

• Level 1—Quoted market prices in active markets for identical assets or liabilities;

• Level 2—Inputs other than Level 1 inputs that are either directly or indirectly observable; and

• Level 3—Unobservable inputs developed using estimates and assumptions developed by the Company which reflect those that a market participant would use.

Determining which category an asset or liability falls within the hierarchy requires significant judgment. The Company evaluates its hierarchy disclosures each quarter. The following table summarizes the financial instruments measured at fair value in the accompanying Condensed Consolidated Balance Sheets as of June 30, 2011 (in thousands):

	Fair Value Measurements as of June 30, 2011
			Quoted Market Prices in Active Markets for Identical Assets  or Liabilities		Significant Other Observable Inputs		Significant Unobservable Inputs
	Total		Level 1		Level 2		Level 3
Liabilities
Interest rate swap liability	$	18,949	$	—	$	18,949	$	—

The carrying amount of accounts receivable at June 30, 2011, including $429.5 million of receivables sold under the Current Receivables Securitization Program, approximates fair value because of the short-term nature of this item.

Accounting guidance on fair value measurements requires separate disclosure of assets and liabilities measured at fair value on a recurring basis, as noted above, from those measured at fair value on a nonrecurring basis. As of June 30, 2011, no assets or liabilities are measured at fair value on a nonrecurring basis.