Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 3,218	$ 2,614	$ 5,698	$ 4,634
Other comprehensive income:
Net unrealized holding gain (loss) on securities available-for-sale	(3,179)	3,164	(2,139)	5,846
Net unrealized gain on securities available-for-sale for which a portion of an other-than-temporary impairment has been recognized in income		205		839
Reclassification adjustment for realized gains included in net income	(126)	(211)	(366)	(362)
Net unrealized gain on derivative used for cash flow hedges	42	17	57	49
Other comprehensive income (loss), before tax, total	(3,263)	3,175	(2,448)	6,372
Income tax (expense) related to other comprehensive income	1,124	(1,100)	844	(2,199)
Other comprehensive income, net of tax	(2,139)	2,075	(1,604)	4,173
Comprehensive Income	$ 1,079	$ 4,689	$ 4,094	$ 8,807