Consolidated Balance Sheets - Parenthetical - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Details
Preferred Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Preferred Stock, Shares Authorized	100,000	100,000
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Common Stock, Shares Authorized	23,000,000	23,000,000
Common Stock, Shares, Issued	18,625,458	18,625,458
Common Stock, Shares, Outstanding	14,818,839	14,864,941
Treasury Stock, Shares	3,806,619	3,760,517