CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	100,000	100,000
Common stock, shares issued (in shares)	25,413	25,413
Common stock, shares outstanding (in shares)	15,454	16,276
Treasury stock, shares (in shares)	9,959	9,137