ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Before - Tax
Net change	$ (49,620)	$ (26,710)	$ 59,822
Tax Effect
Net change	16,415	7,532	(25,126)
Net-of- Tax
Other comprehensive (loss) income	(33,205)	(19,178)	34,696
Available- for-Sale Investment Securities
Before - Tax
Net unrealized (losses) gains arising during the period	(28,681)	22,454	70,537
Net realized gains reclassified into net income	(10,362)	(40,367)	(10,715)
Net change	(39,043)	(17,913)	59,822
Tax Effect
Net unrealized gains (losses) arising during the period	12,058	(9,442)	(29,626)
Net realized gains reclassified into net income	4,357	16,974	4,500
Net change	16,415	7,532	(25,126)
Net-of- Tax
Net unrealized gains (losses) arising during the period	(16,623)	13,012	40,911
Net realized gains reclassified into net income	(6,005)	(23,393)	(6,215)
Other comprehensive (loss) income	(22,628)	(10,381)	34,696
Foreign Currency Translation Adjustments
Before - Tax
Net unrealized (losses) gains arising during the period	(10,577)	(8,797)	0
Net change	(10,577)	(8,797)	0
Tax Effect
Net unrealized gains (losses) arising during the period	0	0	0
Net change	0	0	0
Net-of- Tax
Net unrealized gains (losses) arising during the period	(10,577)	(8,797)	0
Net realized gains reclassified into net income	0	0
Other comprehensive (loss) income	$ (10,577)	$ (8,797)	$ 0