FAIR VALUE MEASUREMENTS (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Total Liabilities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Liabilities)	$ 16,621	$ 15,028	$ 6,500	$ 10,937
Transfers into Level 3 (Liabilities)	0	0	0	0
Transfers out of Level 3 (Liabilities)	0	0	0	0
Included in earnings (Liabilities)	1,596	(809)	10,282	2,614
Included in OCI (Liabilities)	0	0	0	0
Purchases (Liabilities)	12,135	1,830	12,135	805
Sales (Liabilities)	0	0	0	0
Settlements/ Distributions (Liabilities)	(18,143)	(14,071)	(16,708)	(12,378)
Closing Balance (Liabilities)	12,209	1,978	12,209	1,978
Change in unrealized investment gain/loss relating to assets held at the reporting date (Liabilities)	863	110	2,314	111
Total Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	198,594	178,777	226,797	106,017
Transfers into Level 3 (Assets)	1,536	20,412	1,536	56,790
Transfers out of Level 3 (Assets)	(11,322)	0	(30,270)	(1,955)
Included in earnings (Assets)	1,993	7,648	4,074	9,573
Included in OCI (Assets)	(317)	1,222	1,117	1,002
Purchases (Assets)	19,217	10,362	34,581	54,254
Sales (Assets)	(3,481)	(2,105)	(19,201)	(4,015)
Settlements/ Distributions (Assets)	(16,840)	(11,416)	(29,254)	(16,766)
Closing Balance (Assets)	189,380	204,900	189,380	204,900
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	2,080	8,992	3,348	7,967
Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	73,601	50,801	96,400	49,440
Transfers into Level 3 (Assets)	1,536	20,412	1,536	20,412
Transfers out of Level 3 (Assets)	(11,322)	0	(30,270)	(1,955)
Included in earnings (Assets)	15	(981)	73	(979)
Included in OCI (Assets)	(317)	1,222	1,117	1,002
Purchases (Assets)	19,217	3,723	34,581	9,544
Sales (Assets)	(3,481)	(2,105)	(19,201)	(4,015)
Settlements/ Distributions (Assets)	(4,930)	(840)	(9,917)	(1,217)
Closing Balance (Assets)	74,319	72,232	74,319	72,232
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	0	0	0	0
Other Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	96,770	97,083	102,842	27,257
Transfers into Level 3 (Assets)	0	0	0	36,378
Transfers out of Level 3 (Assets)	0	0	0	0
Included in earnings (Assets)	2,059	8,878	3,324	7,862
Included in OCI (Assets)	0	0	0	0
Purchases (Assets)	0	6,193	0	42,905
Sales (Assets)	0	0	0	0
Settlements/ Distributions (Assets)	(8,815)	(4,516)	(16,152)	(6,764)
Closing Balance (Assets)	90,014	107,638	90,014	107,638
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	2,059	8,878	3,324	7,862
Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	28,223	30,893	27,555	29,320
Transfers into Level 3 (Assets)	0	0	0	0
Transfers out of Level 3 (Assets)	0	0	0	0
Included in earnings (Assets)	(81)	(249)	677	2,690
Included in OCI (Assets)	0	0	0	0
Purchases (Assets)	0	446	0	1,805
Sales (Assets)	0	0	0	0
Settlements/ Distributions (Assets)	(3,095)	(6,060)	(3,185)	(8,785)
Closing Balance (Assets)	25,047	25,030	25,047	25,030
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	21	114	24	105
Corporate Debt [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	63,788	40,250	75,875	38,518
Transfers into Level 3 (Assets)	1,536	20,412	1,536	20,412
Transfers out of Level 3 (Assets)	(1,904)	0	(1,904)	(1,955)
Included in earnings (Assets)	15	(981)	73	(979)
Included in OCI (Assets)	(336)	1,164	(383)	1,088
Purchases (Assets)	13,217	3,723	19,181	9,544
Sales (Assets)	(3,481)	(2,105)	(19,201)	(4,015)
Settlements/ Distributions (Assets)	(4,515)	(441)	(6,857)	(591)
Closing Balance (Assets)	68,320	62,022	68,320	62,022
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	0	0	0	0
CMBS [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	9,813	10,551	3,061	10,922
Transfers into Level 3 (Assets)	0	0	0	0
Transfers out of Level 3 (Assets)	(9,418)	0	(9,418)	0
Included in earnings (Assets)	0	0	0	0
Included in OCI (Assets)	20	58	17	(86)
Purchases (Assets)	0	0	9,400	0
Sales (Assets)	0	0	0	0
Settlements/ Distributions (Assets)	(415)	(399)	(3,060)	(626)
Closing Balance (Assets)	0	10,210	0	10,210
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	0	0	0	0
ABS [Member] | Fixed Maturities [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	0	0	17,464	0
Transfers into Level 3 (Assets)	0	0	0	0
Transfers out of Level 3 (Assets)	0	0	(18,948)	0
Included in earnings (Assets)	0	0	0	0
Included in OCI (Assets)	(1)	0	1,483	0
Purchases (Assets)	6,000	0	6,000	0
Sales (Assets)	0	0	0	0
Settlements/ Distributions (Assets)	0	0	0	0
Closing Balance (Assets)	5,999	0	5,999	0
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	0	0	0	0
Other Privately Held Investments [Member] | Other Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	42,378	36,712	42,142	0
Transfers into Level 3 (Assets)	0	0	0	0
Transfers out of Level 3 (Assets)	0	0	0	0
Included in earnings (Assets)	560	(1,150)	796	(1,150)
Included in OCI (Assets)	0	0	0	0
Purchases (Assets)	0	6,193	0	42,905
Sales (Assets)	0	0	0	0
Settlements/ Distributions (Assets)	0	0	0	0
Closing Balance (Assets)	42,938	41,755	42,938	41,755
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	560	(1,150)	796	(1,150)
CLO-Equities [Member] | Other Investments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	54,392	60,371	60,700	27,257
Transfers into Level 3 (Assets)	0	0	0	36,378
Transfers out of Level 3 (Assets)	0	0	0	0
Included in earnings (Assets)	1,499	10,028	2,528	9,012
Included in OCI (Assets)	0	0	0	0
Purchases (Assets)	0	0	0	0
Sales (Assets)	0	0	0	0
Settlements/ Distributions (Assets)	(8,815)	(4,516)	(16,152)	(6,764)
Closing Balance (Assets)	47,076	65,883	47,076	65,883
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	1,499	10,028	2,528	9,012
Derivative [Member] | Other Liabilities [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Liabilities)	16,621	15,028	6,500	10,937
Transfers into Level 3 (Liabilities)	0	0	0	0
Transfers out of Level 3 (Liabilities)	0	0	0	0
Included in earnings (Liabilities)	1,596	(809)	10,282	2,614
Included in OCI (Liabilities)	0	0	0	0
Purchases (Liabilities)	12,135	1,830	12,135	805
Sales (Liabilities)	0	0	0	0
Settlements/ Distributions (Liabilities)	(18,143)	(14,071)	(16,708)	(12,378)
Closing Balance (Liabilities)	12,209	1,978	12,209	1,978
Change in unrealized investment gain/loss relating to assets held at the reporting date (Liabilities)	863	110	2,314	111
Derivative [Member] | Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	3,197	5,977	2,532	4,395
Transfers into Level 3 (Assets)	0	0	0	0
Transfers out of Level 3 (Assets)	0	0	0	0
Included in earnings (Assets)	(102)	(358)	653	2,590
Included in OCI (Assets)	0	0	0	0
Purchases (Assets)	0	446	0	1,805
Sales (Assets)	0	0	0	0
Settlements/ Distributions (Assets)	(3,095)	(6,060)	(3,185)	(8,785)
Closing Balance (Assets)	0	5	0	5
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	0	5	0	5
Insurance-linked securities [Member] | Other Assets [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Opening Balance (Assets)	25,026	24,916	25,023	24,925
Transfers into Level 3 (Assets)	0	0	0	0
Transfers out of Level 3 (Assets)	0	0	0	0
Included in earnings (Assets)	21	109	24	100
Included in OCI (Assets)	0	0	0	0
Purchases (Assets)	0	0	0	0
Sales (Assets)	0	0	0	0
Settlements/ Distributions (Assets)	0	0	0	0
Closing Balance (Assets)	25,047	25,025	25,047	25,025
Change in unrealized investment gain/loss relating to assets held at the reporting date (Assets)	$ 21	$ 109	$ 24	$ 100