CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 2.00	$ 2.00
Common stock, authorized	50,000,000	50,000,000
Common stock, issued	23,922,086	23,922,086
Common stock, outstanding	23,922,086	23,922,086