REINSURANCE (Premiums Written and Earned) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Premiums written [Abstract]
Direct	$ 161,137	$ 129,840	$ 468,379	$ 368,560
Ceded	(96,327)	(119,985)	(259,307)	(231,046)
Net premiums written	64,810	9,855	209,072	137,514
Premiums earned [Abstract]
Direct	147,624	112,253	413,056	310,587
Ceded	(78,219)	(49,967)	(228,609)	(154,289)
Net premiums earned	$ 69,405	$ 62,286	$ 184,447	$ 156,298