Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements of Comprehensive Income (unaudited) [Abstract]
Net earnings	$ 3,428	$ 2,886
Unrealized losses on securities available-for-sale:
Unrealized holding losses arising during the period, net of income tax benefit of $390 for the three months ended March 31, 2013 and net of income tax benefit of $138 for the three months ended March 31, 2012	(725)	(268)
Reclassification adjustment for gains on sales of securities available-for-sale, net of income tax expense of $71 for the three months ended March 31, 2013	(133)	0
Total other comprehensive loss	(858)	(268)
Total comprehensive income	$ 2,570	$ 2,618