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Subsequent Events (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Dec. 31, 2012
Secured Term Loan [Member]
Mar. 31, 2013
Repurchase of Equity [Member]
Mar. 31, 2013
Settlement of Debt [Member]
Mar. 31, 2013
Issuance of Debt [Member]
Line of Credit [Member]
Mar. 31, 2013
Issuance of Debt [Member]
Secured Term Loan [Member]
Mar. 31, 2013
Refinancing of Debt [Member]
Mar. 31, 2013
Discontinued Operation or Asset Disposal [Member]
Subsequent Event [Line Items]                  
Preferred Stock, Dividend Rate, Percentage       7.55%          
Stock Redeemed or Called During Period, Value       $ 155,000          
Debt Instrument, Repurchased and Satisfied Amount         176,564        
Debt, Weighted Average Interest Rate 5.50% 5.60%     6.00%        
Extinguishment of Debt, Incurred Cost Amount         11,775        
Debt Instrument, Face Amount     255,000     250,000 64,000    
Debt Instrument, Variable Interest Rate               0.73%  
Debt Instrument, Interest Rate, Stated Percentage               2.43%  
Proceeds from Sale of Property, Plant, and Equipment                 $ 25,900