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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Mar. 31, 2018
Dec. 31, 2017
CONDENSED CONSOLIDATED BALANCE SHEETS    
Preferred stock, par value (in dollars per share) $ 1.00 $ 1.00
Preferred stock, shares authorized 4,000,000 4,000,000
Preferred stock, shares outstanding 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized 35,000,000 35,000,000
Common stock, shares issued 22,942,386 22,926,026
Common stock, shares outstanding 22,893,941 22,877,581
Treasury stock, shares 48,445 48,445