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INVESTMENTS (Details 6) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]      
Payments to acquire equity method investments $ 1,000,000 $ 103,548,000  
Equity method investments 109,258,000   $ 116,000,000
Harrington Reinsurance Holdings Limited [Member]      
Schedule of Equity Method Investments [Line Items]      
Payments to acquire equity method investments     $ 108,000,000
Equity method investment, ownership percentage     19.00%
Equity method investment, difference between carrying amount and underlying equity     $ 5,000,000
Other Equity Method Investments [Member]      
Schedule of Equity Method Investments [Line Items]      
Equity Method Investment, Other than Temporary Impairment 9,000,000    
Equity method investments $ 0