Condensed Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Stockholders Equity [Abstract]
Balance at beginning of period	$ 51,391	$ 51,176	$ 52,453	$ 49,429
Net income	1,407	1,231	4,016	3,427
Other comprehensive (loss) income	(157)	186	(2,851)	721
Stock options exercised, 574 shares			8
Cash dividends declared	(492)	(492)	(1,477)	(1,476)
Balance at end of period	$ 52,149	$ 52,101	$ 52,149	$ 52,101
Cash dividends declared per share	$ 0.18	$ 0.18	$ 0.54	$ 0.54