FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 4) (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
	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 Total fixed maturity securities	Sep. 30, 2012 Total fixed maturity securities	Sep. 30, 2013 Total fixed maturity securities	Sep. 30, 2012 Total fixed maturity securities	Sep. 30, 2013 Total fixed maturity securities Available-for-sale securities	Sep. 30, 2012 Total fixed maturity securities Available-for-sale securities	Sep. 30, 2013 Total fixed maturity securities Available-for-sale securities	Sep. 30, 2012 Total fixed maturity securities Available-for-sale securities	Sep. 30, 2013 Total fixed maturity securities Trading Securities	Sep. 30, 2012 Total fixed maturity securities Trading Securities	Sep. 30, 2013 Total fixed maturity securities Trading Securities	Sep. 30, 2012 Total fixed maturity securities 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, 2012 States, municipals, and political subdivisions Available-for-sale securities	Sep. 30, 2013 States, municipals, and political subdivisions Available-for-sale securities	Jun. 30, 2013 States, municipals, and political subdivisions Available-for-sale securities	Dec. 31, 2012 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
Assets:
Beginning Balance	$ 1,102,018,000	$ 941,368,000	$ 973,157,000	$ 866,911,000									$ 1,102,018,000	$ 941,368,000	$ 973,157,000	$ 866,911,000	$ 988,653,000	$ 846,258,000	$ 858,975,000	$ 777,728,000	$ 809,628,000	$ 781,085,000	$ 788,325,000	$ 749,385,000	$ 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		$ 4,275,000	$ 4,275,000	$ 4,275,000	$ 4,275,000	$ 3,500,000		$ 20,000,000	$ 20,020,000	$ 20,011,000		$ 194,895,000	$ 172,145,000	$ 167,892,000	$ 119,565,000	$ 5,092,000	$ 114,000	$ 115,000		$ 69,795,000	$ 70,080,000	$ 65,527,000	$ 65,527,000	$ 65,527,000	$ 47,838,000	$ 25,315,000	$ 48,655,000	$ 19,103,000
Total Realized and Unrealized Gains Included in Earnings	40,084,000	23,304,000	92,257,000	37,749,000									40,084,000	23,304,000	92,257,000	37,749,000	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					(1,000)			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				36,917,000	20,278,000	84,176,000	33,951,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	1,275,000	16,811,000	32,060,000	23,858,000									1,275,000	16,811,000	32,060,000	23,858,000	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						661,000				(1,750,000)		(15,733,000)
Total Realized and Unrealized Losses Included in Earnings	(1,208,000)	(182,000)	(4,100,000)	(8,400,000)									(1,208,000)	(182,000)	(4,100,000)	(8,400,000)	(1,208,000)	(148,000)	(4,100,000)	(905,000)					(1,208,000)	(148,000)	(4,100,000)	(905,000)						(1,000)					(1,080,000)	(148,000)	(3,949,000)	(905,000)							(123,000)	(123,000)									(4,000)		(27,000)								(34,000)		(7,495,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(30,482,000)	(1,536,000)	(68,416,000)	(25,311,000)									(30,482,000)	(1,536,000)	(68,416,000)	(25,311,000)	(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)	(1,097,000)
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)	(170,658,000)	(49,049,000)									(62,295,000)	(13,027,000)	(170,658,000)	(49,049,000)	(62,295,000)	(8,732,000)	(170,658,000)	(44,754,000)	(45,655,000)	(7,290,000)	(141,225,000)	(38,238,000)	(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)								(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 and/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	(32,237,000)	1,279,000									195,000	378,000	(32,237,000)	1,279,000	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									(34,093,000)
Ending Balance	1,065,163,000	947,522,000	1,065,163,000	947,522,000									1,065,163,000	947,522,000	1,065,163,000	947,522,000	916,631,000	836,602,000	916,631,000	836,602,000	740,572,000	762,425,000	740,572,000	762,425,000	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		4,275,000	4,275,000	4,275,000	4,275,000	4,275,000				20,005,000		20,005,000	187,488,000	148,503,000	187,488,000	148,503,000	5,092,000	115,000	5,092,000	115,000	65,361,000	65,361,000	65,527,000	65,527,000	65,527,000	83,005,000	45,559,000	83,005,000	45,559,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	36,759,000	23,069,000	73,253,000	29,011,000									36,759,000	23,069,000	73,253,000	29,011,000	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						35,167,000	20,244,000	68,443,000	26,456,000
Liabilities:
Beginning Balance	371,390,000	651,184,000	740,905,000	574,075,000	114,614,000	134,597,000	129,468,000	136,462,000	256,776,000	516,587,000	611,437,000	437,613,000
Total Realized and Unrealized Gains Included in Earnings	39,109,000	11,016,000	277,319,000	67,565,000					39,109,000	11,016,000	277,319,000	67,565,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	(15,528,000)		(37,269,000)		(2,472,000)		(6,159,000)		(13,056,000)		(31,110,000)
Total Realized and Unrealized Losses Included in Earnings		(118,545,000)		(258,285,000)		(5,766,000)		(9,983,000)		(112,779,000)		(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
Other			134,505,000								134,505,000
Ending Balance	341,313,000	752,919,000	341,313,000	752,919,000	110,590,000	134,569,000	110,590,000	134,569,000	230,723,000	618,350,000	230,723,000	618,350,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	26,053,000	(101,763,000)	246,209,000	(180,737,000)					26,053,000	(101,763,000)	246,209,000	(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
Securities transferred from Level 2 to Level 1	0	0	0	0
Securities transferred out of Level 1	$ 0	$ 0	$ 0	$ 0