CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net earnings	$ 45,115	$ 56,801	$ 50,704
Other comprehensive income (loss) related to unrealized gains and (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period	(57,136)	17,532	32,473
Income tax (expense) benefit related to unrealized holding gains (losses) arising during the period	26,190	(7,363)	(13,639)
Reclassification adjustment for net gains included in net earnings	(5,359)	(124)
Income tax expense related to reclassification adjustment	58	52
Other comprehensive (loss) income	(36,247)	10,097	18,834
COMPREHENSIVE INCOME	$ 8,868	$ 66,898	$ 69,538