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Consolidated Balance Sheets Parenthetical (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Consolidated Balance Sheets [Abstract]    
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock, shares authorized 1,000 1,000
Preferred stock, outstanding 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 350,000 350,000
Common stock, shares issued 100,588 98,684
Common stock, outstanding 98,604 96,678
Treasury stock, shares 1,984 2,006