Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

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Subsequent Events (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended
Dec. 31, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
May 31, 2010
2007 Term Loan
Loans Payable [Member]
Jun. 30, 2011
2007 Term Loan
Loans Payable [Member]
Jan. 31, 2012
2007 Term Loan
Loans Payable [Member]
Repayment of Debt [Member]
Subsequent Event [Line Items]              
Long-term Debt, Current Maturities           $ 298,000  
Issuances of stock, shares 41,745,000            
Repayments of Long-term Debt   $ 0 $ 104,681 $ 30,030 $ 102,000   $ 298,200