Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Securities held to maturity, fair value	$ 6,863	$ 7,008
Preferred stock par value (usd per share)	$ 0	$ 0
Preferred stock authorized (in shares)	1,000,000	1,000,000
Preferred stock issued (in shares)	0	0
Common stock par value (usd per share)	$ 0	$ 0
Common stock authorized (in shares)	10,000,000	10,000,000
Common stock issued (in shares)	4,741,720	4,705,480
Common stock outstanding (in shares)	4,741,720	4,646,238
Treasury stock (in shares)	0	59,242