INVESTMENT OPERATIONS (Details 4) (USD $)				3 Months Ended							3 Months Ended	12 Months Ended									3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Below investment grade	Mar. 31, 2014 Fixed maturities	Mar. 31, 2013 Fixed maturities	Dec. 31, 2013 Fixed maturities	Mar. 31, 2014 Residential mortgage-backed securities	Dec. 31, 2013 Residential mortgage-backed securities	Mar. 31, 2014 Commercial mortgage-backed securities	Dec. 31, 2013 Commercial mortgage-backed securities	Mar. 31, 2014 Other asset-backed securities	Dec. 31, 2013 Other asset-backed securities	Mar. 31, 2014 U.S. government-related securities	Dec. 31, 2013 U.S. government-related securities	Mar. 31, 2014 Other government-related securities	Dec. 31, 2013 Other government-related securities	Mar. 31, 2014 State, municipalities, and political subdivisions	Dec. 31, 2013 State, municipalities, and political subdivisions	Mar. 31, 2014 Corporate bonds	Dec. 31, 2013 Corporate bonds	Mar. 31, 2014 Equities	Mar. 31, 2013 Equities	Dec. 31, 2013 Equities
Fair Value
Less Than 12 Months	$ 5,314,683,000	$ 9,873,111,000					$ 358,843,000	$ 333,235,000	$ 252,504,000	$ 429,228,000	$ 118,684,000	$ 175,846,000	$ 737,715,000	$ 891,698,000	$ 10,052,000	$ 10,161,000	$ 40,385,000	$ 172,157,000	$ 3,578,369,000	$ 7,484,010,000	$ 218,131,000		$ 376,776,000
12 Months or More	1,123,580,000	1,022,608,000					49,735,000	210,486,000	50,623,000	13,840,000	532,361,000	497,512,000	14,770,000	6,038,000			1,242,000	335,000	452,733,000	272,423,000	22,116,000		21,974,000
Total	6,438,263,000	10,895,719,000					408,578,000	543,721,000	303,127,000	443,068,000	651,045,000	673,358,000	752,485,000	897,736,000	10,052,000	10,161,000	41,627,000	172,492,000	4,031,102,000	7,756,433,000	240,247,000		398,750,000
Unrealized Loss
Less Than 12 Months	(206,688,000)	(489,767,000)					(11,652,000)	(14,051,000)	(7,095,000)	(18,467,000)	(8,498,000)	(14,555,000)	(33,565,000)	(53,508,000)	(1,000)	(1,000)	(3,500,000)	(8,113,000)	(129,320,000)	(353,211,000)	(13,057,000)		(27,861,000)
12 Months or More	(116,779,000)	(114,849,000)					(3,282,000)	(10,513,000)	(3,295,000)	(1,238,000)	(55,371,000)	(54,993,000)	(884,000)	(570,000)			(545,000)	(178,000)	(45,132,000)	(38,856,000)	(8,270,000)		(8,501,000)
Total	(323,467,000)	(604,616,000)					(14,934,000)	(24,564,000)	(10,390,000)	(19,705,000)	(63,869,000)	(69,548,000)	(34,449,000)	(54,078,000)	(1,000)	(1,000)	(4,045,000)	(8,291,000)	(174,452,000)	(392,067,000)	(21,327,000)		(36,362,000)
Percentage of underlying collateral of student-loan backed auction rate securities guaranteed by the Federal Family Education Loan Program ("FFELP"), minimum											97.00%	97.00%
Available-for-sale securities, fair value	34,056,281,000	32,723,992,000	1,600,000,000	33,238,840,000		32,017,441,000	1,438,773,000	1,445,068,000	1,023,366,000	970,656,000	860,745,000	871,983,000	1,511,241,000	1,507,890,000	51,678,000	51,427,000	1,523,940,000	1,410,829,000	26,829,097,000	25,759,588,000	694,536,000		624,848,000
Available-for-sale securities, amortized cost	31,936,953,000	31,600,087,000	1,600,000,000	31,118,109,000		30,863,805,000	1,409,310,000	1,435,477,000	997,605,000	963,461,000	908,643,000	926,396,000	1,508,287,000	1,529,818,000	48,937,000	49,171,000	1,351,460,000	1,315,457,000	24,893,867,000	24,644,025,000	695,939,000		654,579,000
Securities in trading portfolio			328,900,000	2,800,000,000		2,800,000,000															22,400,000		21,200,000
Securities Not publicly traded			877,900,000
Change in unrealized gains (losses), net of income tax				$ 628,612,000	$ (169,788,000)																$ 18,413,000	$ 3,790,000