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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
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 22 30
Cumulative convertible preferred stock, shares outstanding 22 30
Cumulative convertible preferred stock, minimum liquidation preference $ 9.17 $ 6.98
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 55,000 55,000
Common stock, shares issued 44,276 43,641
Common stock, shares outstanding 34,776 35,366
Treasury stock, shares 9,500 8,275