INVESTMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
INVESTMENTS
Net realized investment gains (losses), excluding OTTI									$ 22,036	$ 26,528	$ 17,293
OTTI										(1,156)	(257)
Net realized investment gains (losses)	3,611	10,999	3,742	3,684	9,139	5,481	(664)	11,416	22,036	25,372	17,036
Net changes in unrealized gains (losses) on investments:									(10,923)	39,855	32,855
Net realized investment gains (losses) and changes in unrealized gains (losses) on investments									11,113	65,227	49,891
Fixed income securities | Available-For-Sale Securities
INVESTMENTS
Net realized investment gains (losses), excluding OTTI									1,338	12,965	10,892
Net changes in unrealized gains (losses) on investments:									(75,228)	23,643	22,393
Fixed income securities | Held-to-Maturity Securities
INVESTMENTS
Net realized investment gains (losses), excluding OTTI									9	247	201
Equity securities
INVESTMENTS
Net realized investment gains (losses), excluding OTTI									21,533	16,245	6,129
OTTI										(1,156)	(257)
Net changes in unrealized gains (losses) on investments:									64,305	16,212	10,462
Other
INVESTMENTS
Net realized investment gains (losses), excluding OTTI									$ (844)	$ (2,929)	$ 71