CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
ASSETS
Securities held-to-maturity, fair value	$ 25,035,844	$ 25,233,254
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	90,000,000	90,000,000
Common stock, shares issued (in shares)	49,789,649	46,359,377
Common stock, shares outstanding (in shares)	49,789,649	46,359,377