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Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2015
Dec. 31, 2014
Consolidated Balance Sheets    
Preferred stock, Par value (in dollars per share) $ 1 $ 1
Preferred stock, Liquidation value (in dollars per share)   $ 1,000
Preferred stock, Shares authorized 300,000 300,000
Preferred stock, Shares issued   47,331
Preferred stock, Shares outstanding   47,331
Common stock, Par value (in dollars per share) $ 1 $ 1
Common Stock, Shares authorized 60,000,000 60,000,000
Common stock, Shares issued 34,427,234 34,364,734
Common stock, Shares outstanding 29,483,429 29,442,508
Treasury stock, Shares 4,943,805 4,922,226