CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Other Comprehensive Income [Abstract]
Net income	$ 7,520	$ 6,477	$ 3,279
Unrealized gains on securities:
Unrealized holding gains	7,522	5,632	2,290
Less: reclassification for net gains (losses) included in net income	1,639	267	(1,778)
Other comprehensive income, before tax	5,883	5,365	4,068
Tax expense related to items of other comprehensive income	(2,421)	(2,208)	(1,646)
Total other comprehensive income	3,462	3,157	2,422
Comprehensive income	$ 10,982	$ 9,634	$ 5,701