Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2011

Notes to Financial Statements [Abstract]

Schedule of Long-term Debt

	December 31,
	2011		2010
Debt:
Senior notes due April 2017 at 8.00%, issued at par value	$	1,500,000	$	1,500,000
Senior notes due April 2020 at 8.25%, issued at par value	1,250,000		1,250,000
Senior notes due March 2021 at 6.375%, issued at par value	250,000		—
Senior secured notes due March 2012 at 7.875% (par value of $250,000 less unamortized discount of $242 at December 31, 2010)	—		249,758
Baltimore Port Facility revenue bonds in series due September 2025 at 5.75%	102,865		102,865
Advance royalty commitments (6.73% and 7.56% weighted average interest rate for December 31, 2011 and 2010, respectively)	31,053		32,211
Note Due December 2012 at 6.10%	—		10,438
Other long-term notes maturing at various dates through 2031	75		93
	3,133,993		3,145,365
Less amounts due in one year	11,759		16,629
Long-Term Debt	$	3,122,234	$	3,128,736

Schedule of Maturities of Long-term Debt [Table Text Block]

Annual undiscounted maturities on long-term debt during the next five years are as follows:

Year ended December 31,	Amount
2012	$	11,759
2013	3,275
2014	3,004
2015	2,732
2016	2,555
Thereafter	3,110,668
Total Long-Term Debt Maturities	$	3,133,993