CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Comprehensive Income [Abstract]
Net income	$ 1,084	$ 1,704	$ 3,522	$ 2,365
Available-for-sale securities:
Gross unrealized holding gain arising in the period	6,562	14,806	13,037	17,054
Related tax expense	(2,297)	(5,182)	(4,563)	(5,969)
Less: reclassification adjustment for net realized gains included in net income	0	567	1,428	638
Related tax expense	0	(198)	(500)	(223)
Net effect on other comprehensive income	4,265	9,255	7,546	10,670
Derivative financial instrument:
Fair value adjustment to derivative financial instrument	188	188	534	453
Related tax expense	(66)	(65)	(187)	(158)
Net effect on other comprehensive income	122	123	347	295
Total other comprehensive income, net of tax	4,387	9,378	7,893	10,965
Total comprehensive income	$ 5,471	$ 11,082	$ 11,415	$ 13,330