RESERVE FOR LOSSES AND LOSS EXPENSES (DETAILS 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net Favorable Prior Year Reserve Development [Line Items]
Net favorable prior year reserve development	$ 85,354	$ 42,115	$ 128,847	$ 96,613
Insurance [Member]
Net Favorable Prior Year Reserve Development [Line Items]
Net favorable prior year reserve development	32,963	6,693	44,571	12,290
Reinsurance [Member]
Net Favorable Prior Year Reserve Development [Line Items]
Net favorable prior year reserve development	$ 52,391	$ 35,422	$ 84,276	$ 84,323