Condensed Consolidated Balance Sheets - Parenthetical - $ / shares	Jun. 30, 2018	Dec. 31, 2017
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	14,794,730	14,890,285
Treasury Stock, Shares	3,830,728	3,735,173