SUMMARY OF INVESTMENTS (Net Investment Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Other	$ 205	$ 252	$ 307
Total investment income from continuing operations	48,127	67,395	60,554
Less investment expenses	8,457	6,981	7,660
Net investment income from continuing operations	39,670	60,414	65,557
Continuing Operations
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net investment income from continuing operations	39,670	60,414	52,894
Discontinued Operations
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net investment income from continuing operations	0	0	12,663
Fixed Maturities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	46,478	50,274	51,356
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Dividends on equity securities	6,368	7,842	7,731
Other long-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	1,890	3,115	8,383
Other long-term investments | Change in Value
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Other	(9,633)	1,114	(10,116)
Mortgage-backed securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	1,949	1,595	412
Short-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	107	522	606
Cash and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	$ 763	$ 2,681	$ 1,875