INVESTMENT OPERATIONS (Details 3) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011		Sep. 30, 2012	Sep. 30, 2011
INVESTMENT OPERATIONS
Other-than-temporary impairments of investments recorded	$ 3,402,000	$ 6,217,000	[1]	$ 51,083,000	$ 37,802,000	[1]
Other-than-temporary impairments of investments recorded in earnings	8,499,000	9,777,000	[1]	40,537,000	24,875,000	[1]
Credit losses reclassified in earnings				7,000,000
Non-credit losses				1,900,000
Other-than-temporary impairments of investments recorded in other comprehensive income (loss)	(5,097,000)	(3,560,000)	[1]	10,546,000	12,927,000	[1]
Debt securities
INVESTMENT OPERATIONS
Other-than-temporary impairments of investments recorded	3,400,000	6,200,000		51,100,000	37,800,000
Other-than-temporary impairments of investments recorded in earnings	8,500,000	9,800,000		40,500,000	24,900,000
Other-than-temporary impairments of investments recorded in other comprehensive income (loss)		(3,600,000)		10,600,000	12,900,000
Other-than-temporary impairments related to debt securities or equity securities				100,000
Losses related to newly impaired securities		1,300,000
Net gain related to previously impaired securities		4,900,000
Credit losses on debt securities
Beginning balance	100,894,000	49,643,000		69,476,000	39,275,000
Additions for newly impaired securities		744,000		19,307,000	10,118,000
Additions for previously impaired securities	6,866,000	6,627,000		18,977,000	10,710,000
Reductions for previously impaired securities that were sold in the current period					(3,089,000)
Ending balance	$ 107,760,000	$ 57,014,000		$ 107,760,000	$ 57,014,000

[1] Recast from previously reported information