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RESERVE FOR LOSSES AND LOSS EXPENSES (DETAILS 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net Favorable Prior Year Reserve Development [Line Items]
Net favorable prior year reserve development	$ 64,538	$ 80,035	$ 193,385	$ 176,648
Insurance [Member]
Net Favorable Prior Year Reserve Development [Line Items]
Net favorable prior year reserve development	9,488	34,065	54,059	46,355
Reinsurance [Member]
Net Favorable Prior Year Reserve Development [Line Items]
Net favorable prior year reserve development	$ 55,050	$ 45,970	$ 139,326	$ 130,293