ALLOWANCES FOR CREDIT LOSS (Premium Receivable Past Due) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Amortized cost	$ 50,208	$ 51,036
Allowance for credit loss	(190)	(233)
Net	50,018	50,803
Current
Financing Receivable, Past Due [Line Items]
Amortized cost	48,275	46,376
Allowance for credit loss	0	0
Net	48,275	46,376
Days Past Due 1-29
Financing Receivable, Past Due [Line Items]
Amortized cost	1,467	4,253
Allowance for credit loss	(13)	(43)
Net	1,454	4,210
Days Past Due 30-59
Financing Receivable, Past Due [Line Items]
Amortized cost	276	159
Allowance for credit loss	(13)	(8)
Net	263	151
Days Past Due 60-89
Financing Receivable, Past Due [Line Items]
Amortized cost	37	94
Allowance for credit loss	(11)	(28)
Net	26	66
Days Past Due 90 Plus
Financing Receivable, Past Due [Line Items]
Amortized cost	153	154
Allowance for credit loss	(153)	(154)
Net	$ 0	$ 0