Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Shareholders’ Equity
Common stock, par value (in dollars per share)	$ 3.13	$ 3.13
Common stock, shares authorized (in shares)	8,000,000	8,000,000
Common stock, shares issued (in shares)	3,784,934	3,773,836
Common stock, shares outstanding (in shares)	3,784,934	3,773,836
Common stock, unvested shares (in shares)	23,634	22,569