REINSURANCE (Premiums Written and Earned) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Premiums Written
Direct	$ 159,131	$ 139,022	$ 460,534	$ 440,151
Ceded	(146,231)	(81,023)	(220,363)	(177,604)
Total premiums written	12,900	57,999	240,171	262,547
Net Premiums Earned
Direct	145,546	144,907	425,133	438,239
Ceded	(58,172)	(46,414)	(156,669)	(174,080)
Net premiums earned	$ 87,374	$ 98,493	$ 268,464	$ 264,159