Consolidated Statements of Comprehensive Earnings (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
NET EARNINGS	$ 26,599	$ 25,696
OTHER ITEMS OF COMPREHENSIVE EARNINGS:
Change in unrealized gain on investment securities available-for-sale, before income taxes	9,228	26,842
Reclassification adjustment for realized gains on investment securities included in net earnings, before income taxes	(3)	(2)
Total other items of comprehensive earnings	9,225	26,840
Income tax expense related to other items of comprehensive earnings	(3,329)	(9,394)
COMPREHENSIVE EARNINGS	$ 32,495	$ 43,142

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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