Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	35,000,000	35,000,000
Common stock, shares issued	9,190,171	9,190,171
Common stock, shares outstanding	8,996,267	9,043,771
Treasury Stock, Shares	193,904	146,400