PARENT COMPANY FINANCIAL INFORMATION - BALANCE SHEETS SHARE INFORMATION (Details) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Common Stock, Par or Stated Value Per Share	$ 1.25	$ 1.25
Common Stock, Shares Authorized	80,000,000	80,000,000
Common Stock, Shares, Issued	37,934,819	37,887,662
Treasury Stock, Shares	4,983,645	4,064,405
Parent
Common Stock, Par or Stated Value Per Share	$ 1.25	$ 1.25
Common Stock, Shares Authorized	80,000,000	80,000,000
Common Stock, Shares, Issued	37,934,819	37,887,662
Treasury Stock, Shares	4,983,645	4,064,405