CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2015	Dec. 31, 2014
Treasury stock, common shares	352,161	352,161
Common Stock
Common stock, par value (usd per share)	$ 1	$ 1
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	22,643,255	23,307,909
Common stock, shares outstanding	22,291,094	22,955,748
Class B Common Stock
Common stock, par value (usd per share)	$ 1	$ 1
Common stock, shares authorized	1,500,000	1,500,000
Common stock, shares issued	1,050,012	1,050,012
Common stock, shares outstanding	1,050,012	1,050,012