Consolidated Balance Sheets (Parenthetical) - USD ($)	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Securities held-to-maturity	$ 0	$ 0
Preferred stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, shares authorized (in shares)	20,000	20,000
Preferred stock, shares issued (in shares)	783	9,283
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares issued (in shares)	10,495,704	10,047,621
Common stock, shares outstanding (in shares)	10,444,627	9,996,544
Treasury stock, shares (in shares)	51,077	51,077