Fair value measurements

6 Months Ended

Jun. 30, 2011

Fair value measurements [Abstract]

Fair Value Disclosures

Fair value measurements

The Company measures the fair value of its deferred compensation plan assets and liabilities on a recurring basis pursuant to ASC Topic 820. ASC Topic 820 establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include:

Level 1: Quoted prices for identical instruments in active markets.

Level 2: Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value driver is observable.

Level 3: Unobservable inputs for which little or no market data is available, therefore requiring an entity to develop its own assumptions.

The following table presents the Company’s financial assets and liabilities that were accounted for at fair value as of June 30, 2011 (amounts in thousands):

	Fair Value Measurements Using:
	Quoted Market		Significant Other		Significant
	Prices in Active		Observable Inputs		Unobservable
	Markets (Level 1)		(Level 2)		Inputs (Level 3)
Assets:
Deferred compensation plan assets	$	—	$	18,503	$	—
Liabilities:
Deferred compensation plan liabilities	$	—	$	13,031	$	—

The fair value of the deferred compensation assets is based on the cash-surrender value of rabbi trust-owned life insurance policies, which are invested in variable life insurance separate accounts that are similar to mutual funds. These investments are in the same accounts and purchased in substantially the same amounts as the deferred compensation plan participants’ selected investments, which represent the underlying liabilities to participants. Liabilities under the deferred compensation plan are recorded at amounts due to participants, based on the fair value of participants’ selected investments.

Fair value of long-term debt

The estimated fair value of the Company’s long-term debt at June 30, 2011 was approximately $2.033 billion, versus its book value of $1.999 billion. The estimated fair value of the Company’s long-term debt at December 31, 2010 was approximately $1.559 billion, versus its book value of $1.530 billion. The estimated fair value of the senior unsecured notes and the term loan facility debt was based on quoted market prices on or about June 30, 2011 and December 31, 2010. The estimated fair value of the revolving loan facility debt was based on its bid price on or about June 30, 2011 and December 31, 2010.