Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2011

Long-Term Debt [Abstract]

Schedule Of Long-Term Debt

	2011		2010
6 5/8% senior notes due 2016	$	249,674	$	249,593
6 1/2% senior notes due 2029		100,000		100,000
6 3/4% senior notes due 2032		250,000		250,000
6 1/2% senior notes due 2035 (the "2035 GO Zone 6 1/2% Notes")		89,000		89,000
6 1/2% senior notes due 2035 (the "2035 IKE Zone 6 1/2% Notes")		65,000		65,000
Loan related to tax-exempt waste disposal revenue bonds due 2027		10,889		10,889
Long-term debt	$	764,563	$	764,482