LONG-TERM DEBT AND LEASE FINANCING OBLIGATION (Details 2) (USD $)	1 Months Ended	12 Months Ended				1 Months Ended				1 Months Ended						1 Months Ended						1 Months Ended				12 Months Ended			1 Months Ended				1 Months Ended	12 Months Ended
	Jul. 31, 2009	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jul. 29, 2009	Jul. 31, 2009 Convertible preferred shares	Sep. 30, 2009 Common Stock	Jul. 31, 2009 Common Stock	Jul. 28, 2009 Common Stock	Apr. 30, 2011 7.125% senior notes due 2013 and 9.5% senior notes due 2014	Jul. 31, 2009 7.125% senior notes due 2013	Dec. 31, 2011 7.125% senior notes due 2013	Dec. 31, 2010 7.125% senior notes due 2013	Jul. 29, 2009 7.125% senior notes due 2013	Mar. 31, 2009 7.125% senior notes due 2013	Jul. 31, 2009 7.125% senior notes due 2013 Convertible preferred shares	Jul. 31, 2009 7.125% senior notes due 2013 Common Stock	Jul. 31, 2009 9.5% senior notes due 2014	Dec. 31, 2011 9.5% senior notes due 2014	Dec. 31, 2010 9.5% senior notes due 2014	Jul. 29, 2009 9.5% senior notes due 2014	Jul. 31, 2009 9.5% senior notes due 2014 Convertible preferred shares	Jul. 31, 2009 9.5% senior notes due 2014 Common Stock	Oct. 31, 2011 10.75% senior subordinated notes due 2016	Jul. 31, 2009 10.75% senior subordinated notes due 2016	Dec. 31, 2011 10.75% senior subordinated notes due 2016	Oct. 20, 2011 10.75% senior subordinated notes due 2016	Jul. 29, 2009 10.75% senior subordinated notes due 2016	Jul. 31, 2009 10.75% senior subordinated notes due 2016 Convertible preferred shares	Jul. 31, 2009 10.75% senior subordinated notes due 2016 Common Stock	Dec. 31, 2011 Lease financing obligation	Dec. 31, 2010 Lease financing obligation	Dec. 31, 2009 Other	Dec. 31, 2011 Other
Long-term debt
Interest rate (as a percent)												7.125%			7.125%				9.50%							10.75%
Principal debt extinguished, net of original issuance discounts				$ 731,500,000						$ 22,200,000																							$ 18,200,000	$ 18,000,000
Loss on extinguishment of debt		(4,908,000)		(42,797,000)																						4,900,000
Redemption price per 100 face value																											105.375
Debt redemption. principal amount, basis for redemption																											100
Payments made for debt extinguishment																								44,100,000
Principal amount of debt exchange	736,000,000										91,000,000							486,800,000							158,100,000
Percentage of debt exchange	92.00%
Outstanding principal amount														100,000,000							500,000,000							200,000,000
Shares issued in exchange for the tendered notes						30,200,000		1,300,000
Reverse stock split, numerator								1
Reverse stock split, denominator								25
Outstanding common shares after reverse stock split									1,400,000
Debt exchange, principal amount, basis for exchange														1,000							1,000							1,000
Exchange rate, number of shares issued in exchange for each $1,000 of principal amount of notes																47.30	2.11					47.30	2.11						18.36	0.82
Preferred stock issued and converted to common stock (in shares)							30,200,000
Total debt			22,132,000										9,000,000							13,200,000
Net gain from debt for equity exchange				400,835,000
Diluted earnings per share represented by net gain from the debt for equity exchange				$ 16.18
Accrued interest on debt extinguished				53,700,000
Deferred financing fees written off				14,100,000
Third party fees incurred on extinguishment of debt				12,400,000
Fair value of common and preferred shares issued in the debt for equity exchange				357,900,000
Fair value of equity issued in the debt for equity exchange (in dollars per share)					$ 11.36
Percentage of increase or decrease in the discount rate that results in an increase or decrease in the estimated fair value of the equity issued					1.00%
Percentage of increase or decrease in the annual forecasted cash flows that results in an increase or decrease in the estimated fair value of the equity issued					10.00%
Increase or decrease in the estimated fair value of the equity issued due to 100 basis points increase or decrease in the discount rate or a 10% increase or decrease in the annual forecasted cash flows					30,000,000
Scheduled maturities of long-term debt outstanding
Thereafter		500,000,000
Cash payments for interest		63,400,000	45,300,000	69,900,000
Lease financing obligation		109,899,000	112,385,000																												109,900,000	112,400,000
Amount of collateralized letter of credit		15,800,000	20,200,000																												8,000,000	10,100,000
Future minimum lease payments
2012																															7,400,000
2013																															7,600,000
2014																															7,700,000
2015																															7,900,000
2016																															8,000,000
Thereafter																															$ 2,000,000