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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Receivables, allowance for doubtful accounts (in dollars) $ 2,752 $ 3,901
Debt issuance costs, accumulated amortization (in dollars) $ 922 $ 11,462
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 200,000,000 200,000,000
Common stock, shares issued 77,788,393 77,446,601
Series B Preferred stock
    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 1,000,000 1,000,000
Preferred stock, shares issued 0 12,275
Series C Preferred stock
    
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized 18,500 18,500
Preferred stock, shares issued 8,624 0