Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 942	$ 616
Other comprehensive income (loss):
Change in net unrealized gain (loss)	538	(287)
Less: Reclassification adjustments for net gains included in net income
Net unrealized holding gain (loss)	538	(287)
Income tax effect	(222)	119
Total other comprehensive income (loss)	316	(168)
Total comprehensive income	$ 1,258	$ 448