Consolidated Statements of Comprehensive Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$ 6,201	$ 5,154	$ 11,817	$ 9,326
Other comprehensive earnings (loss), net of tax:
Unrealized gains (losses) on available-for-sale securities arising during period, net of taxes of $694, $1,002, $37 and $1,737, respectively	(1,121)	1,615	58	2,800
Reclassification adjustment for net gains included in net earnings, net of taxes of $64, $110, $64, and $110, respectively	(102)	(178)	(102)	(178)
Other comprehensive earnings (loss)	(1,223)	1,437	(44)	2,622
Comprehensive earnings	$ 4,978	$ 6,591	$ 11,773	$ 11,948