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Debt (Details Textual) (USD $)
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3 Months Ended | 9 Months Ended | 1 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | 9 Months Ended | 1 Months Ended | 9 Months Ended | ||||||||||||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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Mar. 31, 2010
8.75% Senior Notes due 2015 [Member]
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Sep. 30, 2012
8.75% Senior Notes due 2015 [Member]
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Dec. 31, 2011
8.75% Senior Notes due 2015 [Member]
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Aug. 31, 2009
9.75% Senior Secured Notes due 2015 [Member]
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Sep. 30, 2012
9.75% Senior Secured Notes due 2015 [Member]
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Sep. 30, 2012
9.75% Senior Secured Notes due 2015 [Member]
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Dec. 31, 2011
9.75% Senior Secured Notes due 2015 [Member]
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Jul. 31, 2008
13% Senior Notes due 2013 [Member]
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Sep. 30, 2012
13% Senior Notes due 2013 [Member]
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Sep. 30, 2012
13% Senior Notes due 2013 [Member]
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Dec. 31, 2011
13% Senior Notes due 2013 [Member]
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Aug. 31, 2008
7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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Sep. 30, 2012
7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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Dec. 31, 2011
7% Exchangeable Senior Subordinated Notes due 2014 [Member]
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Oct. 31, 2010
7.625% Senior Notes due 2018 [Member]
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Sep. 30, 2012
7.625% Senior Notes due 2018 [Member]
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Dec. 31, 2011
7.625% Senior Notes due 2018 [Member]
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Aug. 31, 2012
5.25% Senior Notes due 2022 [Member]
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Sep. 30, 2012
5.25% Senior Notes due 2022 [Member]
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Dec. 31, 2011
5.25% Senior Notes due 2022 [Member]
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Feb. 28, 2011
3.25% Convertible Notes due 2011 [Member]
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Sep. 30, 2012
3.25% Convertible Notes due 2011 [Member]
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Jan. 31, 2011
11.25% Senior Secured Notes due 2013 [Member]
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Sep. 30, 2012
11.25% Senior Secured Notes due 2013 [Member]
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| Debt (Textual) [Abstract] | ||||||||||||||||||||||||||||
| Interest rate on instrument | 8.75% | 9.75% | 13.00% | 7.00% | 7.625% | 5.25% | 3.25% | 11.25% | ||||||||||||||||||||
| Aggregate principal amount issued | $ 800,000,000 | $ 257,000,000 | $ 778,500,000 | $ 550,000,000 | $ 700,000,000 | $ 400,000,000 | ||||||||||||||||||||||
| Due date of interest on note | semi-annually in arrears on April 1 and October 1 of each year | semi-annually in arrears on June 1 and December 1 of each year | semi-annually in arrears on May 1 and November 1 of each year | semi-annually in arrears on February 15 and August 15 of each year | ||||||||||||||||||||||||
| Maturity date of notes | Apr. 01, 2015 | Sep. 01, 2015 | Aug. 01, 2013 | Dec. 01, 2014 | Nov. 01, 2018 | Aug. 15, 2022 | ||||||||||||||||||||||
| Proceeds from issuance of debt | 393,687,000 | 0 | 786,000,000 | 244,292,000 | ||||||||||||||||||||||||
| Debt discount | 14,000,000 | 7,754,000 | 9,753,000 | 12,708,000 | 0 | 0 | 8,356,000 | 0 | 0 | 39,504,000 | 4,591,000 | 5,956,000 | 9,970,000 | 10,898,000 | 5,935,000 | 0 | ||||||||||||
| Principal balance repaid | 186,112,000 | 257,000,000 | 681,517,000 | 778,500,000 | 94,148,000 | |||||||||||||||||||||||
| Principal balance repaid inclusive of accrued interest | 914,028,000 | 210,060,000 | 204,258,000 | 281,698,000 | 765,907,000 | 879,133,000 | 40,376,000 | |||||||||||||||||||||
| Aggregate loss on extinguishment of notes | (107,105,000) | 0 | (132,726,000) | (7,206,000) | (14,352,000) | (22,184,000) | (92,753,000) | (110,542,000) | (2,291,000) | (4,915,000) | ||||||||||||||||||
| Number of Shares for each $1000 principal amount on conversion (in shares) | 533.3333 | |||||||||||||||||||||||||||
| Debt instrument convertible principal amount | $ 1,000 | |||||||||||||||||||||||||||
| Conversion price per share (in dollars per share) | $ 1.875 | $ 1.875 | ||||||||||||||||||||||||||
| Minimum purchase price for 3.25% Notes in 2011 | 100.75% | |||||||||||||||||||||||||||
| Maximum purchase price for 3.25% Notes in 2011 | 100.94% | |||||||||||||||||||||||||||
| Maximum consolidated leverage | 6.0 | |||||||||||||||||||||||||||