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Consolidated Balance Sheets (Parenthetical) (USD $)
Jun. 30, 2014
Dec. 31, 2013
Preferred stock, shares par value $ 0.01 $ 0.01
Preferred stock, shares authorized 12,500,000 12,500,000
Common stock, shares par value $ 0.06 $ 0.06
Common stock, shares authorized 150,000,000 150,000,000
Common stock, shares issued 79,214,000 72,200,000
Common stock, shares outstanding 79,214,000 72,200,000
Treasury stock, shares 3,354,000 3,514,000
Series B [Member]
    
Liquidation preference, per share $ 25.00 $ 25.00
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 7,950,000 7,950,000
Preferred stock, shares outstanding 7,950,000 7,950,000