CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net earnings	$ 25,080	$ 3,109	$ 13,494
Other comprehensive income (loss) related to unrealized gains (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period	22,291	(6,607)	(6,410)
Income tax benefit (expense) related to unrealized holding (losses) gains arising during the period	(9,363)	2,775	2,692
Reclassification adjustment for (gain) loss included in net earnings	(4,752)	272	(409)
Income tax (benefit) expense related to reclassification adjustment	1,996	(114)	172
Other comprehensive income (loss)	10,172	(3,674)	(3,955)
Comprehensive income (loss)	$ 35,252	$ (565)	$ 9,539