Consolidated Balance Sheets (unaudited) (Parenthetical) - $ / shares	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50	$ 2.50
Common stock, shares authorized	20,000,000	20,000,000	20,000,000
Common stock, shares issued	12,428,342	10,883,509	10,857,801
Common stock, shares outstanding	12,311,723	10,736,970	10,701,841
Preferred Stock, Par or Stated Value Per Share	$ 1	$ 1	$ 1
Preferred Stock, Shares Authorized	250,000	250,000	250,000
Employee Stock Ownership Plan (ESOP), Number of Suspense Shares	116,619	146,539	155,960