Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Schedule Of Assets And Liabilities On A Recurring Basis

The following tables summarize, by level within the fair value hierarchy, the Company's assets and liabilities at December 31 that were accounted for at fair value on a recurring basis:



	2013
	Level 1		Level 2			Total
Derivative instruments
Risk management assets - Commodity forward contracts	$	48	$	248		$	296
Risk management liabilities - Commodity forward contracts	—		(176		)	(176		)
Marketable securities
Available-for-sale securities	91,595		147,793			239,388

	2012
	Level 1		Level 2			Total
Derivative instruments
Risk management assets - Commodity forward contracts	$	1,395	$	13,032		$	14,427
Risk management liabilities - Commodity forward contracts	—		(13,694		)	(13,694		)
Firm commitments
Hedged portion of firm commitment	—		399			399
Hedged portion of firm commitment	—		(13,032		)	(13,032		)

Schedule Of Carrying And Fair Values Of Long-Term Debt

The carrying and fair values of the Company's long-term debt at December 31, 2013 and 2012 are summarized in the table below. The Company's long-term debt instruments are publicly-traded. A market approach, based upon quotes from financial reporting services, is used to measure the fair value of the Company's long-term debt. Because the Company's long-term debt instruments may not be actively traded, the inputs used to measure the fair value of the Company's long-term debt are classified as Level 2 inputs within the fair value hierarchy.



	2013				2012
	Carrying Value		Fair Value		Carrying Value		Fair Value
3.60% senior notes due 2022	$	248,990	$	236,905	$	248,872	$	251,125
6 ½% senior notes due 2029	100,000		109,490		100,000		119,738
6 ¾% senior notes due 2032	250,000		265,148		250,000		283,168
6 ½% GO Zone Senior Notes Due 2035	89,000		94,606		89,000		102,095
6 ½% IKE Zone Senior Notes Due 2035	65,000		69,094		65,000		74,564
Loan related to tax-exempt waste disposal revenue bonds due 2027	10,889		10,889		10,889		10,889

- Definition

Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities.

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