CONSOLIDATED BALANCE SHEET (UNAUDITED) (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Preferred stock, shares authorized (in shares)	3,000,000	3,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 5.55	$ 5.55
Common stock, shares authorized (in shares)	22,500,000	22,500,000
Common stock, shares issued (in shares)	7,517,796	7,517,546
Common stock, shares outstanding (in shares)	7,037,571	7,037,321
Treasury stock (in shares)	480,225	480,225