FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended							3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended				3 Months Ended		9 Months Ended		3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Annuity account balances	Sep. 30, 2012 Annuity account balances	Sep. 30, 2013 Annuity account balances	Sep. 30, 2012 Annuity account balances	Sep. 30, 2013 Other liabilities.	Sep. 30, 2012 Other liabilities.	Sep. 30, 2013 Other liabilities.	Sep. 30, 2012 Other liabilities.	Sep. 30, 2013 Total investments	Sep. 30, 2012 Total investments	Sep. 30, 2013 Total investments	Sep. 30, 2012 Total investments	Sep. 30, 2013 Fixed maturities	Sep. 30, 2012 Fixed maturities	Sep. 30, 2013 Fixed maturities	Sep. 30, 2012 Fixed maturities	Sep. 30, 2013 Fixed maturities Available-for-sale securities	Sep. 30, 2012 Fixed maturities Available-for-sale securities	Sep. 30, 2013 Fixed maturities Available-for-sale securities	Sep. 30, 2012 Fixed maturities Available-for-sale securities	Sep. 30, 2013 Fixed maturities Trading securities	Sep. 30, 2012 Fixed maturities Trading securities	Sep. 30, 2013 Fixed maturities Trading securities	Sep. 30, 2012 Fixed maturities Trading securities	Sep. 30, 2013 Residential mortgage-backed securities Available-for-sale securities	Sep. 30, 2013 Residential mortgage-backed securities Available-for-sale securities	Sep. 30, 2012 Residential mortgage-backed securities Available-for-sale securities	Jun. 30, 2012 Residential mortgage-backed securities Available-for-sale securities	Sep. 30, 2013 Residential mortgage-backed securities Trading securities	Sep. 30, 2013 Residential mortgage-backed securities Trading securities	Sep. 30, 2013 Other asset-backed securities Available-for-sale securities	Sep. 30, 2012 Other asset-backed securities Available-for-sale securities	Sep. 30, 2013 Other asset-backed securities Available-for-sale securities	Sep. 30, 2012 Other asset-backed securities Available-for-sale securities	Sep. 30, 2013 Other asset-backed securities Trading securities	Sep. 30, 2012 Other asset-backed securities Trading securities	Sep. 30, 2013 Other asset-backed securities Trading securities	Sep. 30, 2012 Other asset-backed securities Trading securities	Sep. 30, 2012 U.S. government-related securities Available-for-sale securities	Sep. 30, 2013 States, municipals, and political subdivisions Available-for-sale securities	Sep. 30, 2012 States, municipals, and political subdivisions Available-for-sale securities	Jun. 30, 2013 States, municipals, and political subdivisions Available-for-sale securities	Jun. 30, 2012 States, municipals, and political subdivisions Available-for-sale securities	Sep. 30, 2013 States, municipals, and political subdivisions Trading securities	Sep. 30, 2013 States, municipals, and political subdivisions Trading securities	Sep. 30, 2013 Other government-related securities Available-for-sale securities	Sep. 30, 2012 Other government-related securities Available-for-sale securities	Sep. 30, 2013 Other government-related securities Available-for-sale securities	Sep. 30, 2012 Other government-related securities Available-for-sale securities	Sep. 30, 2013 Corporate bonds Available-for-sale securities	Sep. 30, 2012 Corporate bonds Available-for-sale securities	Sep. 30, 2013 Corporate bonds Available-for-sale securities	Sep. 30, 2012 Corporate bonds Available-for-sale securities	Sep. 30, 2013 Corporate bonds Trading securities	Sep. 30, 2012 Corporate bonds Trading securities	Sep. 30, 2013 Corporate bonds Trading securities	Sep. 30, 2012 Corporate bonds Trading securities	Sep. 30, 2012 Equity securities	Sep. 30, 2012 Equity securities	Sep. 30, 2013 Equity securities	Jun. 30, 2013 Equity securities	Dec. 31, 2012 Equity securities	Sep. 30, 2013 Other long-term investments	Sep. 30, 2012 Other long-term investments	Sep. 30, 2013 Other long-term investments	Sep. 30, 2012 Other long-term investments	Sep. 30, 2012 Short-term investments
Assets:
Beginning Balance	$ 1,158,198,000	$ 938,425,000	$ 960,044,000	$ 871,122,000									$ 1,158,198,000	$ 938,425,000	$ 960,044,000	$ 871,122,000	$ 988,708,000	$ 846,359,000	$ 859,035,000	$ 777,833,000	$ 809,683,000	$ 781,186,000	$ 788,385,000	$ 749,490,000	$ 179,025,000	$ 65,173,000	$ 70,650,000	$ 28,343,000	$ 14,062,000	$ 4,000	$ 7,000	$ 4,000	$ 1,582,000		$ 576,396,000	$ 584,641,000	$ 596,143,000	$ 614,813,000	$ 168,851,000	$ 65,059,000	$ 70,535,000	$ 28,343,000	$ 15,000,000	$ 4,335,000	$ 69,000	$ 4,330,000	$ 4,340,000	$ 3,500,000		$ 20,000,000	$ 20,020,000	$ 20,011,000		$ 194,895,000	$ 172,181,000	$ 167,892,000	$ 119,601,000	$ 5,092,000	$ 114,000	$ 115,000		$ 73,651,000	$ 80,586,000	$ 69,418,000	$ 69,418,000	$ 69,418,000	$ 100,072,000	$ 18,415,000	$ 31,591,000	$ 12,703,000
Total Realized and Unrealized Gains Included in Earnings	56,958,000	5,745,000	130,724,000	19,590,000									56,958,000	5,745,000	130,724,000	19,590,000	3,167,000	3,018,000	8,081,000	3,790,000		45,000	116,000	339,000	3,167,000	2,973,000	7,965,000	3,451,000								45,000		339,000	3,167,000	2,972,000	7,964,000	3,450,000														116,000			1,000	1,000	1,000	8,000	8,000				53,791,000	2,719,000	122,643,000	15,792,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	3,025,000	16,811,000	47,793,000	23,857,000									3,025,000	16,811,000	47,793,000	23,857,000	3,025,000	16,811,000	47,793,000	23,197,000	3,025,000	16,811,000	47,793,000	23,197,000					1,310,000	1,310,000					52,000	11,462,000	43,808,000	15,981,000												1,000		2,000	18,000	1,662,000	5,349,000	2,673,000	7,198,000						660,000
Total Realized and Unrealized Losses Included in Earnings	(1,508,000)	(182,000)	(4,771,000)	(8,300,000)									(1,508,000)	(182,000)	(4,771,000)	(8,300,000)	(1,208,000)	(148,000)	(4,100,000)	(905,000)					(1,208,000)	(148,000)	(4,100,000)	(905,000)					(1,000)	(1,000)					(1,080,000)	(148,000)	(3,949,000)	(905,000)						(123,000)	(123,000)									(4,000)		(27,000)							(300,000)	(34,000)	(671,000)	(7,395,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(30,482,000)	(1,536,000)	(68,416,000)	(25,310,000)									(30,482,000)	(1,536,000)	(68,416,000)	(25,310,000)	(30,482,000)	(1,389,000)	(68,416,000)	(24,214,000)	(30,482,000)	(1,389,000)	(68,416,000)	(24,214,000)						(337,000)					(26,969,000)	(1,157,000)	(54,517,000)	(22,055,000)					(1,000)								(11,000)	(3,000)	(27,000)	(3,513,000)	(221,000)	(13,559,000)	(2,131,000)					(147,000)	(1,096,000)
Purchases	39,165,000	7,208,000	195,863,000	72,562,000									39,165,000	7,208,000	195,863,000	72,562,000	39,165,000	7,208,000	195,863,000	72,558,000	22,771,000		68,557,000	24,302,000	16,394,000	7,208,000	127,306,000	48,256,000		14,349,000				1,582,000	11,769,000		24,931,000		16,394,000	7,208,000	122,224,000	48,255,000			4,275,000				3,500,000				20,023,000	11,002,000		29,277,000	4,000				1,000		4,000
Sales	(62,295,000)	(13,027,000)	(170,663,000)	(49,053,000)									(62,295,000)	(13,027,000)	(170,663,000)	(49,053,000)	(62,295,000)	(8,732,000)	(170,663,000)	(44,758,000)	(45,655,000)	(7,290,000)	(141,230,000)	(38,242,000)	(16,640,000)	(1,442,000)	(29,433,000)	(6,516,000)	(12,000)	(12,000)	(3,000)		(72,000)	(72,000)	(12,085,000)	(5,200,000)	(62,471,000)	(19,050,000)	(16,568,000)	(1,442,000)	(29,344,000)	(6,516,000)	(15,000,000)	(5,000)	(4,000)					(20,000,000)		(20,000,000)		(13,558,000)	(2,090,000)	(58,742,000)	(4,185,000)			(17,000)		(4,295,000)	(4,295,000)
Transfers in/or out of Level 3	(23,589,000)	(26,802,000)	47,237,000	27,923,000									(23,589,000)	(26,802,000)	47,237,000	27,923,000	(23,589,000)	(26,802,000)	47,237,000	27,923,000	(18,718,000)	(26,802,000)	44,885,000	27,810,000	(4,871,000)		2,352,000	113,000	(15,333,000)	(15,287,000)			(1,494,000)	(1,494,000)			1,227,000				2,210,000							(3,377,000)	(3,377,000)					(3,385,000)	(26,802,000)	58,945,000	27,810,000			5,013,000	113,000
Other	195,000	378,000	1,856,000	(5,371,000)									195,000	378,000	1,856,000	(5,371,000)	195,000	378,000	1,856,000	1,279,000	3,000	(35,000)	537,000	(156,000)	192,000	413,000	1,319,000	1,435,000	11,000	11,000			(15,000)	(15,000)	(392,000)	(153,000)	(350,000)	(390,000)	203,000	413,000	1,327,000	1,435,000	1,000							(1,000)	(4,000)	(10,000)	(9,000)	385,000	122,000	886,000	242,000	4,000		7,000			(6,650,000)
Ending Balance	1,139,667,000	927,020,000	1,139,667,000	927,020,000									1,139,667,000	927,020,000	1,139,667,000	927,020,000	916,686,000	836,703,000	916,686,000	836,703,000	740,627,000	762,526,000	740,627,000	762,526,000	176,059,000	74,177,000	176,059,000	74,177,000	38,000	38,000	4,000	4,000			548,771,000	589,638,000	548,771,000	589,638,000	170,967,000	74,062,000	170,967,000	74,062,000		4,330,000	4,340,000	4,330,000	4,340,000				20,005,000		20,005,000	187,488,000	148,539,000	187,488,000	148,539,000	5,092,000	115,000	5,092,000	115,000	69,217,000	69,217,000	69,418,000	69,418,000	69,418,000	153,563,000	21,100,000	153,563,000	21,100,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	55,083,000	5,510,000	126,782,000	10,952,000									55,083,000	5,510,000	126,782,000	10,952,000	1,592,000	2,825,000	4,810,000	2,555,000					1,592,000	2,825,000	4,810,000	2,555,000											1,596,000	2,823,000	4,814,000	2,545,000																(4,000)	2,000	(4,000)	10,000						53,491,000		121,972,000	8,397,000	2,685,000
Liabilities:
Beginning Balance	450,195,000	651,184,000	740,905,000	574,075,000	114,614,000	134,597,000	129,468,000	136,462,000	335,581,000	516,587,000	611,437,000	437,613,000
Total Realized and Unrealized Gains Included in Earnings	72,905,000	11,016,000	377,398,000	67,565,000					72,905,000	11,016,000	377,398,000	67,565,000
Total Realized and Unrealized Losses Included in Earnings	(26,326,000)	(118,545,000)	(58,650,000)	(258,285,000)	(2,472,000)	(5,766,000)	(6,159,000)	(9,983,000)	(23,854,000)	(112,779,000)	(52,491,000)	(248,302,000)
Issuances	46,000	217,000	247,000	645,000	46,000	217,000	247,000	645,000
Settlements	6,542,000	6,011,000	25,284,000	12,521,000	6,542,000	6,011,000	25,284,000	12,521,000
Ending Balance	397,120,000	752,919,000	397,120,000	752,919,000	110,590,000	134,569,000	110,590,000	134,569,000	286,530,000	618,350,000	286,530,000	618,350,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	49,051,000	(101,763,000)	324,907,000	(180,737,000)					49,051,000	(101,763,000)	324,907,000	(180,737,000)
Transfers
Securities transferred into Level 3	1,300,000	0	72,100,000	54,700,000
Securities transferred out of Level 3	24,900,000	26,800,000	24,900,000	26,800,000
Transfers from Level 2 to Level 1	0	0	0	0
Transfers from Level 1	$ 0	$ 0	$ 0	$ 0