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Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Statement Of Financial Position [Abstract]    
Cumulative convertible preferred stock, par value $ 0.01 $ 0.01
Cumulative convertible preferred stock, shares authorized 1,000 1,000
Cumulative convertible preferred stock, shares issued 108 108
Cumulative convertible preferred stock, shares outstanding 108 108
Cumulative convertible preferred stock, minimum liquidation preference $ 2.66 $ 2.66
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 55,000 55,000
Common stock, shares issued 42,981 41,889
Common stock, shares outstanding 35,297 40,871
Treasury stock, shares 7,684 1,018