ALLOWANCES FOR CREDIT LOSS (Premium Receivable Past Due) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Amortized cost	$ 52,871
Allowance for credit loss	(118)	$ (159)
Net	52,753
Current
Financing Receivable, Past Due [Line Items]
Amortized cost	52,177
Allowance for credit loss	0
Net	52,177
Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	527
Allowance for credit loss	(7)
Net	520
Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	51
Allowance for credit loss	(3)
Net	48
Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	11
Allowance for credit loss	(3)
Net	8
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	105
Allowance for credit loss	(105)
Net	$ 0