FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 4) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended								3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended				3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Total investments	Jun. 30, 2012 Total investments	Jun. 30, 2013 Total investments	Jun. 30, 2012 Total investments	Jun. 30, 2013 Total fixed maturity securities	Jun. 30, 2012 Total fixed maturity securities	Jun. 30, 2013 Total fixed maturity securities	Jun. 30, 2012 Total fixed maturity securities	Jun. 30, 2013 Total fixed maturity securities Available-for-sale securities	Jun. 30, 2012 Total fixed maturity securities Available-for-sale securities	Jun. 30, 2013 Total fixed maturity securities Available-for-sale securities	Jun. 30, 2012 Total fixed maturity securities Available-for-sale securities	Jun. 30, 2013 Total fixed maturity securities Trading Securities	Jun. 30, 2012 Total fixed maturity securities Trading Securities	Jun. 30, 2013 Total fixed maturity securities Trading Securities	Jun. 30, 2012 Total fixed maturity securities Trading Securities	Jun. 30, 2013 Residential mortgage-backed securities Available-for-sale securities	Jun. 30, 2013 Residential mortgage-backed securities Available-for-sale securities	Jun. 30, 2012 Residential mortgage-backed securities Available-for-sale securities	Mar. 31, 2012 Residential mortgage-backed securities Available-for-sale securities	Jun. 30, 2013 Residential mortgage-backed securities Trading Securities	Jun. 30, 2013 Residential mortgage-backed securities Trading Securities	Jun. 30, 2013 Other asset-backed securities Available-for-sale securities	Jun. 30, 2012 Other asset-backed securities Available-for-sale securities	Jun. 30, 2013 Other asset-backed securities Available-for-sale securities	Jun. 30, 2012 Other asset-backed securities Available-for-sale securities	Jun. 30, 2013 Other asset-backed securities Trading Securities	Jun. 30, 2012 Other asset-backed securities Trading Securities	Jun. 30, 2013 Other asset-backed securities Trading Securities	Jun. 30, 2012 Other asset-backed securities Trading Securities	Jun. 30, 2012 U.S. government-related securities Available-for-sale securities	Jun. 30, 2012 States, municipals, and political subdivisions Available-for-sale securities	Jun. 30, 2013 States, municipals, and political subdivisions Available-for-sale securities	Mar. 31, 2013 States, municipals, and political subdivisions Available-for-sale securities	Dec. 31, 2012 States, municipals, and political subdivisions Available-for-sale securities	Mar. 31, 2012 States, municipals, and political subdivisions Available-for-sale securities	Jun. 30, 2013 States, municipals, and political subdivisions Trading Securities	Jun. 30, 2013 States, municipals, and political subdivisions Trading Securities	Jun. 30, 2013 Other government-related securities Available-for-sale securities	Jun. 30, 2012 Other government-related securities Available-for-sale securities	Jun. 30, 2013 Other government-related securities Available-for-sale securities	Jun. 30, 2012 Other government-related securities Available-for-sale securities	Jun. 30, 2013 Corporate bonds Available-for-sale securities	Jun. 30, 2012 Corporate bonds Available-for-sale securities	Jun. 30, 2013 Corporate bonds Available-for-sale securities	Jun. 30, 2012 Corporate bonds Available-for-sale securities	Jun. 30, 2013 Corporate bonds Trading Securities	Jun. 30, 2012 Corporate bonds Trading Securities	Jun. 30, 2013 Corporate bonds Trading Securities	Jun. 30, 2012 Corporate bonds Trading Securities	Jun. 30, 2012 Equity securities	Jun. 30, 2012 Equity securities	Jun. 30, 2013 Equity securities	Mar. 31, 2013 Equity securities	Dec. 31, 2012 Equity securities	Jun. 30, 2013 Other long-term investments	Jun. 30, 2012 Other long-term investments	Jun. 30, 2013 Other long-term investments	Jun. 30, 2012 Other long-term investments	Jun. 30, 2013 Annuity account balances	Jun. 30, 2012 Annuity account balances	Jun. 30, 2013 Annuity account balances	Jun. 30, 2012 Annuity account balances	Jun. 30, 2013 Other liabilities	Jun. 30, 2012 Other liabilities	Jun. 30, 2013 Other liabilities	Jun. 30, 2012 Other liabilities
Assets:
Beginning Balance	$ 921,931,000	$ 907,695,000	$ 973,157,000	$ 866,911,000	$ 921,931,000	$ 907,695,000	$ 973,157,000	$ 866,911,000	$ 786,000,000	$ 804,800,000	$ 858,975,000	$ 777,728,000	$ 709,505,000	$ 749,838,000	$ 788,325,000	$ 749,385,000	$ 76,495,000	$ 54,962,000	$ 70,650,000	$ 28,343,000	$ 4,000	$ 4,000	$ 7,000	$ 4,000			$ 560,668,000	$ 587,613,000	$ 596,143,000	$ 614,813,000	$ 71,383,000	$ 54,961,000	$ 70,535,000	$ 28,343,000	$ 15,000,000		$ 4,275,000	$ 4,275,000	$ 4,275,000	$ 4,275,000			$ 20,003,000	$ 20,006,000	$ 20,011,000		$ 124,555,000	$ 137,940,000	$ 167,892,000	$ 119,565,000	$ 5,112,000	$ 1,000	$ 115,000		$ 70,719,000	$ 70,080,000	$ 65,527,000	$ 65,527,000	$ 65,527,000	$ 70,404,000	$ 32,176,000	$ 48,655,000	$ 19,103,000
Total Realized and Unrealized Gains Included in Earnings	23,146,000	632,000	52,173,000	14,445,000	23,146,000	632,000	52,173,000	14,445,000	1,505,000	32,000	4,914,000	772,000	116,000		116,000	294,000	1,389,000	32,000	4,798,000	478,000										294,000	1,389,000	32,000	4,797,000	478,000													116,000		116,000				1,000							21,641,000	600,000	47,259,000	13,673,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	43,826,000	5,735,000	44,768,000	7,047,000	43,826,000	5,735,000	44,768,000	7,047,000	43,826,000	5,710,000	44,768,000	6,386,000	43,826,000	5,710,000	44,768,000	6,386,000											43,744,000	4,026,000	43,756,000	4,519,000													1,000	18,000	1,000	18,000	81,000	1,666,000	1,011,000	1,849,000					25,000	661,000
Total Realized and Unrealized Losses Included in Earnings	(12,747,000)	(8,049,000)	(16,875,000)	(8,218,000)	(12,747,000)	(8,049,000)	(16,875,000)	(8,218,000)	(2,633,000)	(588,000)	(2,892,000)	(757,000)					(2,633,000)	(588,000)	(2,892,000)	(757,000)											(2,610,000)	(588,000)	(2,869,000)	(757,000)																	(23,000)		(23,000)							(10,114,000)	(7,461,000)	(13,983,000)	(7,461,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(8,019,000)	(8,601,000)	(37,934,000)	(23,775,000)	(8,019,000)	(8,601,000)	(37,934,000)	(23,775,000)	(8,019,000)	(7,652,000)	(37,934,000)	(22,825,000)	(8,019,000)	(7,652,000)	(37,934,000)	(22,825,000)					(337,000)	(337,000)						(6,969,000)	(27,548,000)	(20,898,000)					(1,000)										(3,000)	(16,000)	(7,682,000)	(683,000)	(10,046,000)	(1,910,000)					(949,000)	(950,000)
Purchases	156,698,000	13,342,000	156,698,000	65,354,000	156,698,000	13,342,000	156,698,000	65,354,000	156,698,000	13,342,000	156,698,000	65,350,000	45,786,000		45,786,000	24,302,000	110,912,000	13,342,000	110,912,000	41,048,000	14,349,000	14,349,000			1,582,000	1,582,000	13,162,000		13,162,000		105,830,000	13,342,000	105,830,000	41,047,000		4,275,000					3,500,000	3,500,000				20,023,000	18,275,000		18,275,000	4,000				1,000		4,000
Sales	(54,443,000)	(5,222,000)	(108,363,000)	(36,022,000)	(54,443,000)	(5,222,000)	(108,363,000)	(36,022,000)	(54,443,000)	(5,222,000)	(108,363,000)	(36,022,000)	(44,490,000)	(1,956,000)	(95,570,000)	(30,948,000)	(9,953,000)	(3,266,000)	(12,793,000)	(5,074,000)			(3,000)				(41,377,000)		(50,386,000)	(13,850,000)	(9,953,000)	(3,266,000)	(12,776,000)	(5,074,000)	(15,000,000)												(3,113,000)	(1,956,000)	(45,184,000)	(2,095,000)			(17,000)
Transfers in and/or out of Level 3	64,586,000	35,171,000	70,826,000	54,725,000	64,586,000	35,171,000	70,826,000	54,725,000	64,586,000	35,171,000	70,826,000	54,725,000	62,376,000	35,058,000	63,603,000	54,612,000	2,210,000	113,000	7,223,000	113,000	46,000	46,000							1,227,000		2,210,000		2,210,000														62,330,000	35,058,000	62,330,000	54,612,000		113,000	5,013,000	113,000
Other	(32,960,000)	665,000	(32,432,000)	901,000	(32,960,000)	665,000	(32,432,000)	901,000	1,133,000	665,000	1,661,000	901,000	528,000	87,000	534,000	(121,000)	605,000	578,000	1,127,000	1,022,000							199,000	(29,000)	42,000	(237,000)	602,000	578,000	1,124,000	1,022,000	1,000								(4,000)	(4,000)	(9,000)	(5,000)	333,000	120,000	501,000	120,000	3,000		3,000							(34,093,000)		(34,093,000)
Ending Balance	1,102,018,000	941,368,000	1,102,018,000	941,368,000	1,102,018,000	941,368,000	1,102,018,000	941,368,000	988,653,000	846,258,000	988,653,000	846,258,000	809,628,000	781,085,000	809,628,000	781,085,000	179,025,000	65,173,000	179,025,000	65,173,000	14,062,000	14,062,000	4,000	4,000	1,582,000	1,582,000	576,396,000	584,641,000	576,396,000	584,641,000	168,851,000	65,059,000	168,851,000	65,059,000		4,275,000	4,275,000	4,275,000	4,275,000	4,275,000	3,500,000	3,500,000	20,000,000	20,020,000	20,000,000	20,020,000	194,895,000	172,145,000	194,895,000	172,145,000	5,092,000	114,000	5,092,000	114,000	69,795,000	69,795,000	65,527,000	65,527,000	65,527,000	47,838,000	25,315,000	47,838,000	25,315,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	12,015,000	(7,416,000)	37,061,000	5,934,000	12,015,000	(7,416,000)	37,061,000	5,934,000	488,000	(555,000)	3,785,000	(278,000)					488,000	(555,000)	3,785,000	(278,000)											511,000	(555,000)	3,779,000	(278,000)																	(23,000)		6,000							11,527,000	(6,861,000)	33,276,000	6,212,000
Liabilities:
Beginning Balance	663,495,000	527,050,000	740,905,000	574,075,000																																																												123,681,000	137,238,000	129,468,000	136,462,000	539,814,000	389,812,000	611,437,000	437,613,000
Total Realized and Unrealized Gains Included in Earnings	153,664,000	8,748,000	238,210,000	56,549,000																																																																153,664,000	8,748,000	238,210,000	56,549,000
Total Realized and Unrealized Losses Included in Earnings	(6,817,000)	(136,666,000)	(21,740,000)	(139,740,000)																																																												(1,686,000)	(1,143,000)	(3,686,000)	(4,217,000)	(5,131,000)	(135,523,000)	(18,054,000)	(135,523,000)
Issuances	65,000	103,000	201,000	428,000																																																												65,000	103,000	201,000	428,000
Settlements	10,818,000	3,887,000	(18,741,000)	6,510,000																																																												10,818,000	3,887,000	(18,741,000)	6,510,000
Other	134,505,000		134,505,000																																																																	134,505,000		134,505,000
Ending Balance	371,390,000	651,184,000	371,390,000	651,184,000																																																												114,614,000	134,597,000	114,614,000	134,597,000	256,776,000	516,587,000	256,776,000	516,587,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	148,533,000	(126,775,000)	220,156,000	(78,974,000)																																																																148,533,000	(126,775,000)	220,156,000	(78,974,000)
Transfers
Securities transferred into Level 3	64,600,000	35,200,000	70,800,000	54,700,000
Securities transferred out of Level 3	0	0	0	0
Securities transferred from Level 2 to Level 1	0	0	0	0
Securities transferred out of Level 1	$ 0	$ 0	$ 0	$ 0