SUMMARY OF INVESTMENTS (Net Investment Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Other	$ 307	$ 300	$ 422
Total investment income from continuing operations	60,554	57,495	61,794
Less investment expenses	7,660	6,305	6,510
Net investment income from continuing operations	52,894	51,190	55,284
Discontinued Operations
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net investment income from continuing operations	12,663	49,720	51,538
Continuing and Discontinuing Operations
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Net investment income from continuing operations	65,557	100,910	106,822
Fixed Maturities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	51,356	44,784	43,147
Equity securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Dividends on equity securities	7,731	7,108	6,448
Other long-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	8,383	6,870	1,200
Other long-term investments | Change in Value
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Other	(10,116)	(2,812)	10,178
Collateralized Mortgage Backed Securities
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	412	0	0
Short-term investments
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	606	120	47
Cash and cash equivalents
Schedule of Investment Income, Reported Amounts, by Category [Line Items]
Interest income	$ 1,875	$ 1,125	$ 352