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Debt and Debt-Related Parties 2007 Term Loan (Details) (USD $)
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3 Months Ended | 1 Months Ended | 1 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2012
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Mar. 31, 2011
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Dec. 31, 2011
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May 30, 2007
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May 31, 2010
2007 Term Loan
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May 31, 2010
Loans Payable [Member]
2007 Term Loan
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Jan. 31, 2012
Loans Payable [Member]
2007 Term Loan
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Jun. 30, 2011
Loans Payable [Member]
2007 Term Loan
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Dec. 31, 2010
Loans Payable [Member]
2007 Term Loan
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May 30, 2007
Loans Payable [Member]
2007 Term Loan
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Jan. 31, 2012
Repayment of Debt [Member]
Loans Payable [Member]
2007 Term Loan
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| Debt Instrument [Line Items] | |||||||||||
| Debt Instrument, Face Amount | $ 400,000,000 | ||||||||||
| Fixed interest rate on loan | 9.75% | ||||||||||
| Pledged subordinated units for 2007 Term Loan | 135,383,831 | ||||||||||
| Partnership interest sold, percent | 30.00% | ||||||||||
| Proceeds from sale of partnership interest | 104,300,000 | ||||||||||
| Repayments of Long-term Debt | 298,000,000 | 0 | 102,000,000 | 298,200,000 | |||||||
| Long-term Debt, Excluding Current Maturities | 2,466,287,000 | 2,465,113,000 | 298,000,000 | ||||||||
| Long-term Debt, Current Maturities | $ 298,000,000 | $ 298,000,000 | |||||||||