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Long-term Debt Instruments (Details) (USD $)
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12 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | 1 Months Ended | |||||||||||||||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Nov. 30, 2010
9 1/4% Senior Notes
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Sep. 30, 2010
9 1/4% Senior Notes
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Nov. 30, 2006
9 1/4% Senior Notes
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Jan. 31, 2009
9 1/4% Senior Notes
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Jun. 30, 2007
9 1/4% Senior Notes
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Sep. 30, 2010
7 7/8% Senior Notes
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Nov. 30, 2010
6 5/8% Senior Notes
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Dec. 31, 2011
Term Loans - Senior Secured Credit Facility
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Nov. 30, 2006
Term Loans - Senior Secured Credit Facility
Senior Secured Credit Facility - November 2006
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Jul. 31, 2010
Tranche B-1 [Member]
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Jul. 31, 2010
Tranche B-1 [Member]
Senior Secured Credit Facility - November 2006
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May 31, 2011
Tranche B-1 [Member]
Incremental Agreement May 2011 - Senior Secured Credit Facility
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Jul. 31, 2010
Tranche B-2 [Member]
Amendment July 2010 - Senior Secured Credit Facility
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Mar. 31, 2011
Tranche B-3 [Member]
Amendment March 2011 - Senior Secured Credit Facility
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Mar. 31, 2011
Tranche B-1 and Tranche B-2 [Member]
Amendment March 2011 - Senior Secured Credit Facility
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May 31, 2011
Incremental Tranche B-3 [Member]
Incremental Agreement May 2011 - Senior Secured Credit Facility
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Nov. 30, 2006
Revolver - Senior Secured Credit Facility
Senior Secured Credit Facility - November 2006
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Jul. 31, 2010
Revolver - Senior Secured Credit Facility
Amendment July 2010 - Senior Secured Credit Facility
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Mar. 31, 2011
Revolver - Senior Secured Credit Facility
Amendment March 2011 - Senior Secured Credit Facility
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| Debt Instrument | ||||||||||||||||||||||
| Principal amount | $ 1,000,000,000 | $ 550,000,000 | $ 400,000,000 | $ 1,000,000,000 | $ 1,000,000,000 | $ 1,600,000,000 | $ 500,000,000 | $ 1,000,000,000 | ||||||||||||||
| Maturity date | Nov. 01, 2014 | Sep. 01, 2018 | Nov. 15, 2020 | Nov. 03, 2013 | Nov. 03, 2016 | Mar. 17, 2018 | Mar. 17, 2018 | Mar. 17, 2016 | ||||||||||||||
| Outstanding principal amended | 1,000,000,000 | |||||||||||||||||||||
| Proceeds from issuance | 974,000,000 | 988,100,000 | 490,200,000 | |||||||||||||||||||
| Debt issuance fees | 26,000,000 | 11,900,000 | 9,800,000 | 7,900,000 | ||||||||||||||||||
| Stated interest rate | 9.25% | 7.875% | 6.625% | |||||||||||||||||||
| Maximum borrowing capacity | 1,600,000,000 | 100,000,000 | 67,500,000 | 100,000,000 | ||||||||||||||||||
| Basis spread on variable rate | 2.25% | 3.50% | 3.75% | 3.821% | 3.75% | |||||||||||||||||
| Periodic payment, annual aggregate percent of principal | 1.00% | |||||||||||||||||||||
| Periodic payment, amount | 1,250,000 | 2,500,000 | ||||||||||||||||||||
| Extinguishment of debt, amount | 1,600,000,000 | 313,100,000 | 535,800,000 | |||||||||||||||||||
| Loss on extinguishment of debt | 9,536,000 | 143,626,000 | 0 | 128,000,000 | 15,600,000 | 9,500,000 | ||||||||||||||||
| Net proceeds from issuance and repayment of debt | 1,700,000,000 | 327,500,000 | 455,500,000 | |||||||||||||||||||
| Weighted average interest rate | 5.065% | |||||||||||||||||||||
| Capital lease obligations, current | 8,070,000 | |||||||||||||||||||||
| Capital lease obligations, noncurrent | $ 273,097,000 | |||||||||||||||||||||