CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred Stock, shares authorized (shares)	500,000	500,000
Preferred Stock, shares issued (shares)	0	0
Common Stock, stated value (USD per share)	$ 1	$ 1
Common Stock, shares authorized (shares)	45,000,000	45,000,000