SHAREHOLDERS' EQUITY (Reconciliation of Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Before Tax
Cumulative effect of new accounting standards			$ (1,349)	$ 0
Income Tax
Cumulative effect of new accounting standards			355	0
Net
Accumulated other comprehensive income (loss), beginning-of-period			1,770
Cumulative effect of new accounting standards			(994)	0
Accumulated other comprehensive income (loss), end-of-period	$ (5,350)		(5,350)
AOCI Attributable to Parent
Before Tax
Accumulated other comprehensive income (loss), beginning-of-period	(5,210)	$ 7,034	2,287	3,324
Other comprehensive income (loss) before reclassification	(1,748)	3,862	(8,948)	7,467
Reclassification adjustment for realized and unrealized losses (gains) included in net income	(208)	(2,648)	844	(2,543)
Comprehensive income (loss)	(1,956)	1,214	(8,104)	4,924
Accumulated other comprehensive income (loss), end-of-period	(7,166)	8,248	(7,166)	8,248
Income Tax
Accumulated other comprehensive income (loss), beginning-of-period	1,349	(2,646)	(593)	(1,201)
Other comprehensive income (loss) before reclassification	443	(1,543)	2,268	(2,947)
Reclassification adjustment for realized and unrealized losses (gains) included in net income	24	1,023	(214)	982
Other Comprehensive Income (Loss), Tax	467	(520)	2,054	(1,965)
Accumulated other comprehensive income (loss), end-of-period	1,816	(3,166)	1,816	(3,166)
Net
Accumulated other comprehensive income (loss), beginning-of-period	(3,861)	4,388	1,694	2,123
Other comprehensive income (loss) before reclassification	(1,305)	2,319	(6,680)	4,520
Reclassification adjustment for realized and unrealized (gains) losses included in net income	(184)	(1,625)	630	(1,561)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(1,489)	694	(6,050)	2,959
Accumulated other comprehensive income (loss), end-of-period	$ (5,350)	$ 5,082	$ (5,350)	$ 5,082