Condensed Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement Of Stockholders Equity [Abstract]
Balance at beginning of period	$ 52,830	$ 49,918	$ 52,453	$ 49,429
Net income	1,247	1,141	2,609	2,196
Other comprehensive (loss) income	(2,202)	610	(2,694)	536
Stock options exercised, 574 shares	8		8
Cash dividends declared	(492)	(493)	(985)	(985)
Balance at end of period	$ 51,391	$ 51,176	$ 51,391	$ 51,176
Cash dividends declared per share	$ 0.18	$ 0.18	$ 0.36	$ 0.36