LOSS AND LOSS ADJUSTMENT EXPENSE RESERVES Change in Outstanding Loss and Loss Adjustment Expense Reserve For Health Claims (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Liability for Claims and Claims Adjustment Expense [Line Items]
Case reserves			$ 224,732	$ 217,834
IBNR			257,038	252,754
Total	$ 470,588	$ 479,435	481,770	470,588	$ 479,435	$ 482,662
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Gross balance at January 1	470,588	482,662
Less: Losses recoverable				(27,531)		(43,705)
Net balance at January 1	443,057	438,957
Incurred losses related to:
Current year	247,559	264,129
Prior years	5,385	30,174
Total incurred	252,944	294,303
Paid losses related to:
Current year	(72,453)	(93,822)
Prior years	(161,222)	(200,384)
Total paid	(233,675)	(294,206)
Foreign currency revaluation	(505)	(1,154)
Net balance at September 30	461,821	437,900
Add: Losses recoverable			19,949	27,531	41,535
Gross balance at September 30	481,770	479,435
Prior years adjustment increase (decrease)	5,385	30,174
Net loss reserve on prior contracts increase (decrease)	(4,800)	(27,700)
Health
Liability for Claims and Claims Adjustment Expense [Line Items]
Total	12,994	14,810	12,994	18,063	14,810	24,502
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Gross balance at January 1	18,063	24,502
Less: Losses recoverable				$ 0		$ 0
Net balance at January 1	18,063	24,502
Incurred losses related to:
Current year	25,032	26,013
Prior years	1,341	2,196
Total incurred	26,373	28,209
Paid losses related to:
Current year	(15,115)	(14,741)
Prior years	(16,327)	(23,160)
Total paid	(31,442)	(37,901)
Foreign currency revaluation	0	0
Net balance at September 30	12,994	14,810
Add: Losses recoverable			$ 0		$ 0
Gross balance at September 30	12,994	14,810
Prior years adjustment increase (decrease)	$ 1,341	$ 2,196