XML 18 R6.htm IDEA: XBRL DOCUMENT v3.21.2
Condensed Consolidated Balance Sheets (unaudited) (Parenthetical) - $ / shares
Sep. 30, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Common stock, par value (usd per share) $ 1 $ 1
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares, issued 63,865,151 62,827,179
Treasury stock, shares 43,885 32,492