CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
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	23,356,299	23,354,457
Common stock, outstanding	23,356,299