OTHER COMPREHENSIVE INCOME (LOSS) (DETAILS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Before Tax Amount
Unrealized gains (losses) arising during the period	$ (86,076)	$ 133,575	$ (81,013)	$ 214,135
Adjustment for reclassification of net realized investment gains (losses) and OTTI losses recognized in net income	9,392	(40,259)	54,489	(56,328)
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(76,684)	93,316	(26,524)	157,807
Non-credit portion of OTTI losses	0	0	0	0
Foreign currency translation adjustment	2,188	3,790	(9,225)	6,449
Total other comprehensive income (loss), net of tax	(74,496)	97,106	(35,749)	164,256
Tax (Expense) Benefit
Unrealized gains (losses) arising during the period	14,035	(13,025)	3,785	(22,202)
Adjustment for reclassification of net realized investment gains (losses) and OTTI losses recognized in net income	(535)	6,330	(529)	12,785
Unrealized gains (losses) arising during the period, net of reclassification adjustment	13,500	(6,695)	3,256	(9,417)
Non-credit portion of OTTI losses	0	0	0	0
Foreign currency translation adjustment	0	0	0	0
Total comprehensive income (loss), net of tax	13,500	(6,695)	3,256	(9,417)
Net of Tax Amount
Unrealized gains (losses) arising during the period	(72,041)	120,550	(77,228)	191,933
Adjustment for reclassification of net realized investment gains (losses) and OTTI losses recognized in net income	8,857	(33,929)	53,960	(43,543)
Unrealized gains (losses) arising during the period, net of reclassification adjustment	(63,184)	86,621	(23,268)	148,390
Non-credit portion of OTTI losses	0	0	0	0
Foreign currency translation adjustment	2,188	3,790	(9,225)	6,449
Total other comprehensive income (loss), net of tax	$ (60,996)	$ 90,411	$ (32,493)	$ 154,839