REINSURANCE (Premiums Written and Earned) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Premiums written [Abstract]
Direct	$ 146,051	$ 136,025
Ceded	(27,304)	(43,570)
Net premiums written	118,747	92,455
Premiums earned [Abstract]
Direct	147,978	128,100
Ceded	(69,485)	(73,103)
Net premiums earned	$ 78,493	$ 54,997