CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities
Net income	$ 302,452	$ 315,637	$ 224,869
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Realized investment losses (gains)	66,331	(32,222)	25,393
Amortization of deferred policy acquisition costs and value of business acquired	203,565	264,993	164,963
Capitalization of deferred policy acquisition costs	(312,684)	(366,156)	(382,553)
Depreciation expense	7,860	9,171	9,626
Deferred income tax	74,333	85,893	82,516
Accrued income tax	19,956	(5,201)	69,865
Interest credited to universal life and investment products	962,678	993,574	972,806
Policy fees assessed on universal life and investment products	(794,825)	(712,038)	(611,917)
Change in reinsurance receivables	(159,930)	(27,931)	(234,032)
Change in accrued investment income and other receivables	(4,757)	(31,509)	(29,017)
Change in policy liabilities and other policyholders' funds of traditional life and health products	303,211	14,781	337,207
Trading securities:
Maturities and principal reductions of investments	276,659	283,239	355,831
Sale of investments	454,150	860,474	730,385
Cost of investments acquired	(585,618)	(950,051)	(963,403)
Other net change in trading securities	(56,615)	7,933	(25,520)
Change in other liabilities	46,068	(147,244)	10,236
Other income - gains on repurchase of non-recourse funding obligations	(35,456)	(40,112)	(19,027)
Other, net	(75,294)	97,382	(7,974)
Net cash provided by operating activities	692,084	620,613	710,254
Cash flows from investing activities
Maturities and principal reductions of investments, available-for-sale	1,176,422	1,399,830	2,058,678
Sale of investments, available-for-sale	2,548,314	2,955,665	3,426,040
Cost of investments acquired, available-for-sale	(4,215,228)	(5,158,064)	(6,389,859)
Change in investments, held-to-maturity	(300,000)
Mortgage loans:
New lendings	(351,511)	(501,500)	(353,913)
Repayments	741,402	453,749	364,302
Change in investment real estate, net	10,207	1,483	(2,551)
Change in policy loans, net	14,428	14,190	31,663
Change in other long-term investments, net	(121,577)	75,452	(74,555)
Change in short-term investments, net	(83,288)	126,225	701,589
Net unsettled security transactions	37,169	68,810	(340)
Purchase of property and equipment	(6,248)	(17,667)	(10,734)
Sales of property and equipment			41
Payments for business acquisitions		(209,609)	(348,288)
Net cash used in investing activities	(549,910)	(791,436)	(597,927)
Cash flows from financing activities
Borrowings under line of credit arrangements and debt	572,500	45,000	132,000
Principal payments on line of credit arrangement and debt	(676,650)	(26,852)	(275,000)
Issuance (repayment) of non-recourse funding obligations	178,200	(124,600)	(42,600)
Repurchase program borrowings	150,000
Dividends to shareowners	(56,228)	(52,503)	(46,250)
Repurchase of common stock	(106,201)	(82,671)
Investment product deposits and change in universal life deposits	3,716,553	4,216,738	3,635,447
Investment product withdrawals	(3,818,845)	(3,777,365)	(3,477,430)
Other financing activities, net		(24,051)	20,606
Net cash (used in) provided by financing activities	(40,671)	173,696	(53,227)
Change in cash	101,503	2,873	59,100
Cash at beginning of period	267,298	264,425	205,325
Cash at end of period	$ 368,801	$ 267,298	$ 264,425