Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 47,695	$ 51,312
OTHER COMPREHENSIVE INCOME (LOSS)
Unrealized holding gains (losses) arising during the period on available-for-sale securities	29,130	(22,735)
Unrealized gain on AFS securities	2,547
Less: Reclassification adjustment for realized gains included in net income	2,740	6
Other comprehensive gain (loss), before tax effect	28,937	(22,741)
Less: Tax effect of other comprehensive income (loss)	7,563	(5,943)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	21,374	(16,798)
COMPREHENSIVE INCOME	$ 69,069	$ 34,514

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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