ALLOWANCE FOR CREDIT LOSSES (Premium Receivable Past Due) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Amortized cost	$ 38,526
Allowance for credit loss	(189)	$ (159)
Net	38,337
Current
Financing Receivable, Past Due [Line Items]
Amortized cost	35,822
Allowance for credit loss	0
Net	35,822
Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	2,507
Allowance for credit loss	(26)
Net	2,481
Financial Asset, 30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	29
Allowance for credit loss	(1)
Net	28
Financial Asset, 60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	9
Allowance for credit loss	(3)
Net	6
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Amortized cost	159
Allowance for credit loss	(159)
Net	$ 0