INVESTMENTS (DETAILS 6) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity method investments	$ 107,913	$ 0	$ 0
Equity method investments	116,000	$ 10,932
Harrington Reinsurance Holdings Limited [Member]
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity method investments	$ 108,000
Equity method investment, ownership percentage	19.00%
Equity method investment, difference between carrying amount and underlying equity	$ 5,000
Other Equity Method Investments [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 8,000