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, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012 Total investments	Jun. 30, 2011 Total investments	Jun. 30, 2012 Total investments	Jun. 30, 2011 Total investments	Jun. 30, 2012 Fixed maturities	Jun. 30, 2011 Fixed maturities	Jun. 30, 2012 Fixed maturities	Jun. 30, 2011 Fixed maturities	Jun. 30, 2012 Fixed maturities Available-for-sale securities	Jun. 30, 2011 Fixed maturities Available-for-sale securities	Jun. 30, 2012 Fixed maturities Available-for-sale securities	Jun. 30, 2011 Fixed maturities Available-for-sale securities	Jun. 30, 2012 Fixed maturities Trading Securities	Jun. 30, 2011 Fixed maturities Trading Securities	Jun. 30, 2012 Fixed maturities Trading Securities	Jun. 30, 2011 Fixed maturities Trading Securities	Jun. 30, 2012 Residential mortgage-backed securities Available-for-sale securities	Jun. 30, 2011 Residential mortgage-backed securities Available-for-sale securities	Mar. 31, 2012 Residential mortgage-backed securities Available-for-sale securities	Mar. 31, 2011 Residential mortgage-backed securities Available-for-sale securities	Jun. 30, 2011 Residential mortgage-backed securities Trading Securities	Jun. 30, 2011 Commercial mortgage-backed securities Available-for-sale securities	Jun. 30, 2012 Other asset-backed securities Available-for-sale securities	Jun. 30, 2011 Other asset-backed securities Available-for-sale securities	Jun. 30, 2012 Other asset-backed securities Available-for-sale securities	Jun. 30, 2011 Other asset-backed securities Available-for-sale securities	Jun. 30, 2012 Other asset-backed securities Trading Securities	Jun. 30, 2011 Other asset-backed securities Trading Securities	Jun. 30, 2012 Other asset-backed securities Trading Securities	Jun. 30, 2011 Other asset-backed securities Trading Securities	Jun. 30, 2011 U.S. government-related securities Available-for-sale securities	Jun. 30, 2012 U.S. government-related securities Available-for-sale securities	Jun. 30, 2011 U.S. government-related securities Available-for-sale securities	Jun. 30, 2011 U.S. government-related securities Trading Securities	Jun. 30, 2011 U.S. government-related securities Trading Securities	Jun. 30, 2012 States, municipals, and political subdivisions Available-for-sale securities	Jun. 30, 2011 States, municipals, and political subdivisions Available-for-sale securities	Mar. 31, 2012 States, municipals, and political subdivisions Available-for-sale securities	Jun. 30, 2012 Other government-related securities Available-for-sale securities	Jun. 30, 2012 Other government-related securities Available-for-sale securities	Jun. 30, 2012 Corporate bonds Available-for-sale securities	Jun. 30, 2011 Corporate bonds Available-for-sale securities	Jun. 30, 2012 Corporate bonds Available-for-sale securities	Jun. 30, 2011 Corporate bonds Available-for-sale securities	Jun. 30, 2012 Corporate bonds Trading Securities	Jun. 30, 2011 Corporate bonds Trading Securities	Jun. 30, 2012 Corporate bonds Trading Securities	Jun. 30, 2011 Corporate bonds Trading Securities	Jun. 30, 2012 Equity securities	Jun. 30, 2011 Equity securities	Jun. 30, 2012 Equity securities	Jun. 30, 2011 Equity securities	Jun. 30, 2012 Other long-term investments	Jun. 30, 2011 Other long-term investments	Jun. 30, 2012 Other long-term investments	Jun. 30, 2011 Other long-term investments	Jun. 30, 2012 Annuity account balances	Jun. 30, 2011 Annuity account balances	Jun. 30, 2012 Annuity account balances	Jun. 30, 2011 Annuity account balances	Jun. 30, 2012 Other liabilities	Jun. 30, 2011 Other liabilities	Jun. 30, 2012 Other liabilities	Jun. 30, 2011 Other liabilities
Assets:
Beginning Balance	$ 907,695,000	$ 865,888,000	$ 866,911,000	$ 902,879,000	$ 907,695,000	$ 865,888,000	$ 866,911,000	$ 902,879,000	$ 804,800,000	$ 764,478,000	$ 777,728,000	$ 804,522,000	$ 749,838,000	$ 719,381,000	$ 749,385,000	$ 741,155,000	$ 54,962,000	$ 45,097,000	$ 28,343,000	$ 63,367,000	$ 7,000	$ 20,000	$ 4,000	$ 19,000		$ 19,901,000	$ 587,613,000	$ 639,407,000	$ 614,813,000	$ 641,129,000	$ 54,961,000	$ 41,713,000	$ 28,343,000	$ 59,925,000	$ 15,084,000	$ 15,000,000	$ 15,109,000	$ 3,384,000	$ 3,442,000			$ 4,275,000	$ 20,006,000		$ 137,940,000	$ 64,871,000	$ 119,565,000	$ 64,996,000	$ 1,000				$ 70,719,000	$ 69,038,000	$ 70,080,000	$ 66,592,000	$ 32,176,000	$ 32,372,000	$ 19,103,000	$ 31,765,000
Total Realized and Unrealized Gains Included in Earnings	632,000	4,075,000	14,445,000	6,312,000	632,000	4,075,000	14,445,000	6,312,000	32,000	2,245,000	772,000	3,068,000		1,786,000	294,000	1,786,000	32,000	459,000	478,000	1,282,000								1,786,000	294,000	1,786,000	32,000	329,000	478,000	1,152,000				130,000	130,000															49,000		49,000	600,000	1,781,000	13,673,000	3,195,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	5,735,000	3,222,000	7,047,000	4,247,000	5,735,000	3,222,000	7,047,000	4,247,000	5,710,000	3,222,000	6,386,000	3,802,000	5,710,000	3,222,000	6,386,000	3,802,000						12,000				147,000	4,026,000	1,751,000	4,519,000	2,158,000													18,000	18,000	1,666,000	1,471,000	1,849,000	1,485,000					25,000		661,000	445,000
Total Realized and Unrealized Losses Included in Earnings	(8,049,000)	(2,962,000)	(8,218,000)	(4,685,000)	(8,049,000)	(2,962,000)	(8,218,000)	(4,685,000)	(588,000)	(2,590,000)	(757,000)	(3,506,000)		(2,133,000)		(2,137,000)	(588,000)	(457,000)	(757,000)	(1,369,000)		(4,000)						(2,133,000)		(2,133,000)	(588,000)	(457,000)	(757,000)	(1,313,000)					(56,000)																		(7,461,000)	(372,000)	(7,461,000)	(1,179,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(8,601,000)	(4,169,000)	(23,775,000)	(6,962,000)	(8,601,000)	(4,169,000)	(23,775,000)	(6,962,000)	(7,652,000)	(3,424,000)	(22,825,000)	(6,217,000)	(7,652,000)	(3,424,000)	(22,825,000)	(6,217,000)											(6,969,000)	(3,050,000)	(20,898,000)	(5,146,000)					(87,000)	(1,000)					(115,000)			(16,000)	(683,000)	(287,000)	(1,910,000)	(956,000)					(949,000)	(745,000)	(950,000)	(745,000)
Purchases	13,342,000	154,902,000	65,354,000	166,353,000	13,342,000	154,902,000	65,354,000	166,353,000	13,342,000	152,940,000	65,350,000	162,390,000		149,148,000	24,302,000	158,598,000	13,342,000	3,792,000	41,048,000	3,792,000								109,148,000		118,598,000	13,342,000	3,792,000	41,047,000	3,792,000						4,275,000				20,023,000		40,000,000	4,000	40,000,000			1,000			1,962,000	4,000	3,963,000
Sales	(5,222,000)	(115,033,000)	(36,022,000)	(144,834,000)	(5,222,000)	(115,033,000)	(36,022,000)	(144,834,000)	(5,222,000)	(114,984,000)	(36,022,000)	(144,785,000)	(1,956,000)	(109,924,000)	(30,948,000)	(120,833,000)	(3,266,000)	(5,060,000)	(5,074,000)	(23,952,000)	(3,000)	(12,000)			(12,000)	(102,000)		(109,148,000)	(13,850,000)	(118,598,000)	(3,266,000)	(5,060,000)	(5,074,000)	(23,952,000)		(15,000,000)									(1,956,000)	(764,000)	(2,095,000)	(2,121,000)						(49,000)		(49,000)
Transfers in and/or out of Level 3	35,171,000	54,760,000	54,725,000	36,692,000	35,171,000	54,760,000	54,725,000	36,692,000	35,171,000	54,739,000	54,725,000	36,671,000	35,058,000	12,698,000	54,612,000	(5,370,000)	113,000	42,041,000	113,000	42,041,000		(9,000)				(19,946,000)																			35,058,000	12,698,000	54,612,000	14,585,000	113,000	42,041,000	113,000	42,041,000		21,000		21,000
Other	665,000	762,000	901,000	1,443,000	665,000	762,000	901,000	1,443,000	665,000	762,000	901,000	1,443,000	87,000	(12,000)	(121,000)	(42,000)	578,000	774,000	1,022,000	1,485,000							(29,000)	(15,000)	(237,000)	(48,000)	578,000	776,000	1,022,000	1,489,000	3,000	1,000	6,000	(2,000)	(4,000)				(4,000)	(5,000)	120,000		120,000
Ending Balance	941,368,000	961,445,000	941,368,000	961,445,000	941,368,000	961,445,000	941,368,000	961,445,000	846,258,000	857,388,000	846,258,000	857,388,000	781,085,000	770,742,000	781,085,000	770,742,000	65,173,000	86,646,000	65,173,000	86,646,000	4,000	7,000	4,000	19,000			584,641,000	637,746,000	584,641,000	637,746,000	65,059,000	41,093,000	65,059,000	41,093,000	15,000,000		15,000,000	3,512,000	3,512,000	4,275,000		4,275,000	20,020,000	20,020,000	172,145,000	117,989,000	172,145,000	117,989,000	114,000	42,041,000	114,000	42,041,000	69,795,000	70,276,000	69,795,000	70,276,000	25,315,000	33,781,000	25,315,000	33,781,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	(7,416,000)	1,785,000	5,934,000	2,535,000	(7,416,000)	1,785,000	5,934,000	2,535,000	(555,000)	376,000	(278,000)	519,000					(555,000)	376,000	(278,000)	519,000											(555,000)	(128,000)	(278,000)	71,000				130,000	74,000											374,000		374,000					(6,861,000)	1,409,000	6,212,000	2,016,000
Liabilities:
Beginning Balance	527,050,000	321,406,000	574,075,000	333,793,000																																																									137,238,000	143,020,000	136,462,000	143,264,000	389,812,000	178,386,000	437,613,000	190,529,000
Total Realized and Unrealized Gains Included in Earnings	8,748,000	960,000	56,549,000	20,308,000																																																													8,748,000	960,000	56,549,000	20,308,000
Total Realized and Unrealized Losses Included in Earnings	136,666,000	40,205,000	139,740,000	49,541,000																																																									1,143,000	2,104,000	4,217,000	4,235,000	135,523,000	38,101,000	135,523,000	45,306,000
Sales		1,868,000		1,868,000																																																														1,868,000		1,868,000
Issuances	103,000	135,000	428,000	314,000																																																									103,000	135,000	428,000	314,000
Settlements	3,887,000	2,789,000	6,510,000	5,343,000																																																									3,887,000	2,789,000	6,510,000	5,343,000
Ending Balance	651,184,000	356,129,000	651,184,000	356,129,000																																																									134,597,000	142,470,000	134,597,000	142,470,000	516,587,000	213,659,000	516,587,000	213,659,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	(126,775,000)	(37,141,000)	(78,974,000)	(24,998,000)																																																													(126,775,000)	(37,141,000)	(78,974,000)	(24,998,000)
Transfers
Securities transferred into Level 3	$ 35,200,000		$ 54,700,000