SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of year	$ 94,292
Change in "shadow" deferred policy acquisition costs	0	$ 0	$ 7,274
Recorded asset at end of year	87,094	94,292
Continuing and Discontinuing Operations
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of year	94,292	92,796	159,253
Underwriting costs deferred	203,054	218,195	212,302
Amortization of deferred policy acquisition costs	(210,252)	(216,699)	(208,127)
Ending unamortized deferred policy acquisition costs	87,094	94,292	163,428
Change in "shadow" deferred policy acquisition costs	0	0	7,274
Sale of discontinued operations	0	0	(77,906)
Recorded asset at end of year	87,094	94,292	92,796
Property and casualty business
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of year	94,292	92,796	88,102
Underwriting costs deferred	203,054	218,195	210,926
Amortization of deferred policy acquisition costs	(210,252)	(216,699)	(206,232)
Recorded asset at end of year	87,094	94,292	92,796
Life Insurance | Discontinued Operations
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Recorded asset at beginning of year	0	0	71,151
Underwriting costs deferred	0	0	1,376
Amortization of deferred policy acquisition costs	0	0	(1,895)
Ending unamortized deferred policy acquisition costs	0	0	70,632
Change in "shadow" deferred policy acquisition costs	0	0	7,274
Sale of discontinued operations	0	0	(77,906)
Recorded asset at end of year	$ 0	$ 0	$ 0