Income Taxes - Federal income tax on earnings differs from that computed at statutory corporate tax rate (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Federal income taxes at statutory rate of 34%	$ 395	$ 383
Increase (decrease) in taxes resulting primarily from:
Stock compensation	3	1
Nontaxable interest income	(11)	(10)
Cash surrender value of life insurance	(39)	(41)
Other	(2)	2
Federal income taxes per financial statements	$ 346	$ 335
Effective tax rate	29.80%	29.80%