Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Consolidated Balance Sheets
Common stock, Par value (in dollars per share)	$ 1.00	$ 1.00
Common Stock, Shares authorized	60,000,000	60,000,000
Common stock, Shares issued	34,957,384	34,853,757
Common stock, Shares outstanding	29,451,585	29,931,809
Treasury stock, Shares	5,505,799	4,921,948