OTHER COMPREHENSIVE INCOME (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification out of accumulated comprehensive income into net income available to common shareholders [Line Items]
Other realized investment gains(losses)	$ 20,044	$ 9,452	$ (1,318)	$ (19,949)
OTTI losses	(5,412)	(4,247)	(13,493)	(20,346)
Income (loss) before income taxes and interest in income (loss) of equity method investments	(482,300)	198,399	(371,686)	374,606
Income tax expense	25,877	(9,352)	38,547	(7,712)
Net income (loss) available to common shareholders	(467,740)	176,644	(377,695)	334,554
Non-cash foreign exchange losses			24,149	0
Foreign currency translation adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of accumulated comprehensive income into net income available to common shareholders [Line Items]
Income (loss) before income taxes and interest in income (loss) of equity method investments	0	0	(24,149)	0
Income tax expense	0	0	0	0
Net income (loss) available to common shareholders	0	0	(24,149)	0
Unrealized investment gains (losses) on available for sale investments [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of accumulated comprehensive income into net income available to common shareholders [Line Items]
Other realized investment gains(losses)	21,337	9,297	5,224	(19,992)
OTTI losses	(5,412)	(4,247)	(13,493)	(20,346)
Income (loss) before income taxes and interest in income (loss) of equity method investments	15,925	5,050	(8,269)	(40,338)
Income tax expense	(2,639)	(2,408)	(1,900)	(2,282)
Net income (loss) available to common shareholders	$ 13,286	$ 2,642	$ (10,169)	$ (42,620)