Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

Fair Value Measurements [Abstract]

Assets And Liabilities Measured At Fair Value On A Recurring Basis

		Level 1		Level 2 (1)		Level 3		Total	Valuation Technique
Assets:
Natural gas contracts.............	$	–	$	20,239	$	–	$	20,239	(c)
Interest rate swaps................		–		83		–		83	(c)
Foreign currency forwards.....		–		110		–		110	(c)
Liabilities:
Oil contracts ........................		–		23,647		–		23,647	(c)
Fair value of long term debt(2) ...............................................		1,143,077		119,609		–		1,262,686	(a), (b)
Interest rate swaps................		–		338		–		338	(c)
Foreign currency forwards.....		–		13		–		13	(c)
Total net liability..................	$	1,143,077	$	123,175	$	–	$	1,266,252

(1)Unless otherwise indicated, the fair value of our Level 2 derivative instruments reflects our best estimate and is based upon exchange or over-the-counter quotations whenever they are available. Quoted valuations may not be available due to location differences or terms that extend beyond the period for which quotations are available. Where quotes are not available, we utilize other valuation techniques or models to estimate market values. These modeling techniques require us to make estimations of future prices, price correlation and market volatility and liquidity. Our actual results may differ from our estimates, and these differences could be positive or negative.

(2)See Note 7 for additional information regarding our long term debt.The fair value of our long term debt at March 31, 2012 is as follows:

Fair Value Of Long Term Debt

		Fair Value		Carrying Value
Term Loans (mature July 2015)..........................................................	$	380,395	$	379,000
Revolving Credit Facility (matures July 2015).....................................		100,000		100,000
2025 Notes (mature March 2025).......................................................		160,099		157,830	(a)
2032 Notes (mature March 2032)		212,500		200,000	(b)
Senior Unsecured Notes (mature January 2016).................................		290,083		274,960
MARAD Debt (matures February 2027) (c)...........................................		119,609		107,756
Total..............................................................................................	$	1,262,686	$	1,219,546

(a)Amount excludes the related unamortized debt discount of $3.7 million.

(b)Amount excludes the related unamortized debt discount of $35.4 million.

(c)The estimated fair value of all debt, other than the MARAD debt, was determined using Level 1 inputs using the market approach.The fair value of the MARAD debt was determined using a third party evaluation of the remaining average life and outstanding principal balance of the MARAD indebtedness as compared to other governmental obligations in the marketplace with similar terms.The fair value of the MARAD Debt was estimated using Level 2 fair value inputs using the market approach.