Consolidated Condensed Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 2,112	$ 1,644	$ 4,088	$ 3,070
Other comprehensive income (loss):
Net unrealized holding gain (loss) on securities available-for-sale	(5,771)	2,030	(6,711)	4,081
Net unrealized loss on securities available-for-sale for which a portion of an other-than-temporary impairment has been recognized in income	475	(139)	465	(152)
Less: Reclassification adjustment for realized gains included in net income	(43)	(283)	(382)	(480)
Net unrealized gain on derivative used for cash flow hedges	54		91	14
Total other comprehensive income (loss), before tax	(5,285)	1,608	(6,537)	3,463
Income taxes related to other comprehensive income	1,838	(570)	2,276	(1,207)
Other comprehensive income (loss)	(3,447)	1,038	(4,261)	2,256
Comprehensive income (loss)	$ (1,335)	$ 2,682	$ (173)	$ 5,326