Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 130,790	$ 59,185
Accounts receivable	28,612	46,181
Prepaid expenses and other current assets	33,933	20,995
Total Current Assets	193,335	126,361
Property and Equipment, Net ($384,003 and $349,433 not subject to amortization at June 30, 2013 and December 31, 2012, respectively)	1,054,834	1,003,441
Goodwill	259,238	262,764
Other Assets	39,065	49,906
Total Assets	1,546,472	1,442,472
Current Liabilities:
Accounts payable	72,212	60,153
Current maturities of debt	115,163	15,713
Monetary production payment, current portion	20,833
Accrued expenses and other	96,154	90,100
Total Current Liabilities	304,362	165,966
Long-term debt	749,894	843,793
Deferred Taxes	125,146	141,887
Monetary production payment, long-term portion	104,167
Other Liabilities	134,075	147,692
Total Liabilities	1,417,644	1,299,338
Commitments and Contingencies
Series C Convertible Preferred Stock
Series C preferred stock: Liquidation preference - 37,000 and 37,000 at June 30, 2013 and December 31, 2012, respectively.	43,703	43,703
Stockholders Equity:
Common stock; shares issued and outstanding - 47,137 and 46,691 shares at June 30, 2013 and December 31, 2012, respectively.	47	47
Additional paid-in capital	508,340	493,803
Treasury stock, at cost - 72 and 72 shares at June 30, 2013 and December 31, 2012, respectively	(587)	(587)
Accumulated deficit	(422,675)	(393,832)
Total Stockholders Equity	85,125	99,431
Total Liabilities and Stockholders Equity	1,546,472	1,442,472
Series C Preferred Stock [Member]
Series C Convertible Preferred Stock
Series C preferred stock: Liquidation preference - 37,000 and 37,000 at June 30, 2013 and December 31, 2012, respectively.	43,703	43,703
Series B Preferred Stock [Member]
Stockholders Equity:
Series B preferred stock - Liquidation preference: $3,666 and $3,588 at June 30, 2013 and December 31, 2012, respectively.