REINSURANCE (Premiums Written and Earned) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net Premiums Written
Direct	$ 157,003	$ 180,152	$ 527,495	$ 558,492
Ceded	(265,554)	(304,751)	(460,637)	(379,268)
Total premiums written	(108,551)	(124,599)	66,858	179,224
Net Premiums Earned
Direct	178,368	183,518	535,848	538,988
Ceded	(124,439)	(99,972)	(406,693)	(238,054)
Net premiums earned	$ 53,929	$ 83,546	$ 129,155	$ 300,934