INVESTMENTS (Details 7) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair value
Less than 12 months	$ 682,254	$ 88,007
12 Months and Greater	3,188	960
Total Fair value	685,442	88,967
Cost or amortized Cost
Less than 12 months	710,949	89,232
12 months and greater	3,426	993
Total Cost or Amortized Cost	714,375	90,225
Unrealized Loss
Less than 12 months	(28,695)	(1,225)
12 Months and Greater	(238)	(33)
Total Unrealized Loss	(28,933)	(1,258)
Fixed income
Fair value
Less than 12 months	679,860	71,800
12 Months and Greater	3,188	960
Total Fair value	683,048	72,760
Cost or amortized Cost
Less than 12 months	708,280	72,150
12 months and greater	3,426	993
Total Cost or Amortized Cost	711,706	73,143
Unrealized Loss
Less than 12 months	(28,420)	(350)
12 Months and Greater	(238)	(33)
Total Unrealized Loss	(28,658)	(383)
U.S. government
Fair value
Less than 12 months		749
Total Fair value		749
Cost or amortized Cost
Less than 12 months		749
Total Cost or Amortized Cost		749
U.S. Agency
Fair value
Less than 12 months	5,760
Total Fair value	5,760
Cost or amortized Cost
Less than 12 months	5,997
Total Cost or Amortized Cost	5,997
Unrealized Loss
Less than 12 months	(237)
Total Unrealized Loss	(237)
Non-U.S. Government
Fair value
Less than 12 months	1,825
Total Fair value	1,825
Cost or amortized Cost
Less than 12 months	1,890
Total Cost or Amortized Cost	1,890
Unrealized Loss
Less than 12 months	(65)
Total Unrealized Loss	(65)
Mortgage-backed
Fair value
Less than 12 months	118,283
Total Fair value	118,283
Cost or amortized Cost
Less than 12 months	124,034
Total Cost or Amortized Cost	124,034
Unrealized Loss
Less than 12 months	(5,751)
Total Unrealized Loss	(5,751)
ABS/CMBS
Fair value
Less than 12 months	54,115	18
Total Fair value	54,115	18
Cost or amortized Cost
Less than 12 months	56,014	18
Total Cost or Amortized Cost	56,014	18
Unrealized Loss
Less than 12 months	(1,899)
Total Unrealized Loss	(1,899)
Corporate
Fair value
Less than 12 months	190,470	35,969
12 Months and Greater	2,245	960
Total Fair value	192,715	36,929
Cost or amortized Cost
Less than 12 months	198,250	36,162
12 months and greater	2,477	993
Total Cost or Amortized Cost	200,727	37,155
Unrealized Loss
Less than 12 months	(7,780)	(193)
12 Months and Greater	(232)	(33)
Total Unrealized Loss	(8,012)	(226)
Municipal
Fair value
Less than 12 months	309,407	35,064
12 Months and Greater	943
Total Fair value	310,350	35,064
Cost or amortized Cost
Less than 12 months	322,095	35,221
12 months and greater	949
Total Cost or Amortized Cost	323,044	35,221
Unrealized Loss
Less than 12 months	(12,688)	(157)
12 Months and Greater	(6)
Total Unrealized Loss	(12,694)	(157)
Equity securities
Fair value
Less than 12 months	2,394	16,207
Total Fair value	2,394	16,207
Cost or amortized Cost
Less than 12 months	2,669	17,082
Total Cost or Amortized Cost	2,669	17,082
Unrealized Loss
Less than 12 months	(275)	(875)
Total Unrealized Loss	$ (275)	$ (875)