Comprehensive Income - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Comprehensive Income
Gain on sale of securities	$ 381	$ 121
Salaries and benefits	11,260	9,734
Income before income taxes	2,612	3,332
Income tax expense	(816)	(1,229)
Net Income	1,796	2,103
Amount Reclassified from AOCI
Comprehensive Income
Net Income	194	34
Available-for-sale securities, Unrealized holding gains | Amount Reclassified from AOCI
Comprehensive Income
Gain on sale of securities	381	121
Income before income taxes	381	121
Income tax expense	(152)	(49)
Net Income	229	72
Defined benefit pension plan items, Change in defined benefit pension plan | Amount Reclassified from AOCI
Comprehensive Income
Salaries and benefits	(59)	(64)
Income before income taxes	(59)	(64)
Income tax expense	24	26
Net Income	$ (35)	$ (38)