ALLOWANCES FOR CREDIT LOSS (Premium Receivable Past Due) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Amortized cost	$ 51,036
Allowance for credit loss	(233)	$ (159)
Net	50,803
Current
Financing Receivable, Past Due [Line Items]
Amortized cost	46,376
Allowance for credit loss	0
Net	46,376
1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	4,253
Allowance for credit loss	(43)
Net	4,210
30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	159
Allowance for credit loss	(8)
Net	151
60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	94
Allowance for credit loss	(28)
Net	66
90 Plus Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	154
Allowance for credit loss	(154)
Net	$ 0