ALLOWANCES FOR CREDIT LOSS (Premium Receivable Past Due) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Amortized cost	$ 40,989	$ 51,036
Allowance for credit loss	(227)	(233)
Net	40,762	50,803
Current
Financing Receivable, Past Due [Line Items]
Amortized cost	38,286	46,376
Allowance for credit loss	0	0
Net	38,286	46,376
Days Past Due 1-29
Financing Receivable, Past Due [Line Items]
Amortized cost	2,323	4,253
Allowance for credit loss	(22)	(43)
Net	2,301	4,210
Days Past Due 30-59
Financing Receivable, Past Due [Line Items]
Amortized cost	131	159
Allowance for credit loss	(7)	(8)
Net	124	151
Days Past Due 60-89
Financing Receivable, Past Due [Line Items]
Amortized cost	73	94
Allowance for credit loss	(22)	(28)
Net	51	66
Days Past Due 90 Plus
Financing Receivable, Past Due [Line Items]
Amortized cost	176	154
Allowance for credit loss	(176)	(154)
Net	$ 0	$ 0