INVESTMENTS (DETAILS 9) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	$ 26,210	$ 72,720	$ 31,227
Fixed Maturities [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	23,650	50,802	25,884
Non-US Government [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	3,557	3,538	17,291
Corporate Debt [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	20,093	47,029	8,107
Non-Agency RMBS [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	0	111	7
ABS [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	0	124	61
Municipals [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	0	0	418
Equity Securities [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	2,560	21,918	5,343
Common Stock [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	0	0	741
Exchange-Traded Funds [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	2,560	10,732	4,602
Bond Mutual Funds [Member]
Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net [Line Items]
Total OTTI recognized in earnings	$ 0	$ 11,186	$ 0