Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 49,617	$ 13,381
Adjustments to reconcile net income to net cash provided by operating activities:
Interest sensitive and index product benefits	398,085	425,687
Amortization of deferred sales inducements	50,957	16,332
Annuity product charges	(36,854)	(34,135)
Change in fair value of embedded derivatives	67,340	(126,336)
Increase in traditional life and accident and health insurance reserves	45,720	11,616
Policy acquisition costs deferred	(222,358)	(155,813)
Amortization of deferred policy acquisition costs	94,085	28,185
Provision for depreciation and other amortization	9,292	4,744
Amortization of discounts and premiums on investments	(78,582)	(122,658)
Realized gains on investments and net OTTI losses recognized	10,847	(6,925)
Change in fair value of derivatives	(127,799)	125,469
Deferred income taxes	(64,332)	(68,812)
Loss on extinguishment of debt	0	292
Share-based compensation	4,181	3,975
Change in accrued investment income	(47,812)	637
Change in income taxes recoverable/payable	(3,308)	118,267
Change in other assets	2,182	6,641
Change in other policy funds and contract claims	95,560	34,767
Change in collateral held for derivatives	12,910	(244,816)
Change in other liabilities	(74,889)	(16,479)
Other	703	255
Net cash provided by operating activities	185,545	14,274
Sales, maturities, or repayments of investments:
Fixed maturity securities - available for sale	3,244,966	2,038,295
Fixed maturity securities - held for investment	0	892,464
Equity securities - available for sale	2,958	23,020
Mortgage loans on real estate	86,079	53,277
Derivative instruments	275,473	307,799
Other investments	57	0
Acquisition of investments:
Fixed maturity securities - available for sale	(3,189,624)	(3,641,409)
Fixed maturity securities - held for investment	(1,279,831)	0
Equity securities - available for sale	0	(10,125)
Mortgage loans on real estate	(296,884)	(137,301)
Derivative instruments	(189,759)	(156,318)
Other investments	(1,660)	(81)
Purchases of property, furniture and equipment	(3,552)	(4,985)
Net cash used in investing activities	(1,351,777)	(635,364)
Financing activities
Receipts credited to annuity policyholder account balances	2,450,646	1,893,642
Coinsurance deposits	(37,196)	(158,442)
Return of annuity policyholder account balances	(898,472)	(788,938)
Financing fees incurred and deferred	(1,566)	0
Repayments of notes payable	0	(6,641)
Acquisition of common stock	(6)	(50)
Excess tax benefits realized from share-based compensation plans	1,117	250
Proceeds from issuance of common stock	4,255	1,864
Change in checks in excess of cash balance	(828)	(3,222)
Net cash provided by financing activities	1,517,950	938,463
Increase in cash and cash equivalents	351,718	317,373
Cash and cash equivalents at beginning of period	597,766	528,002
Cash and cash equivalents at end of period	949,484	845,375
Cash paid during period for:
Interest expense	15,210	12,983
Income taxes	93,200	56,488
Income tax refunds received	0	100,000
Non-cash operating activity:
Deferral of sales inducements	189,200	151,079
Non-cash investing activity:
Real estate acquired in satisfaction of mortgage loans	6,308	4,300
Mortgage loan on real estate sold	1,215	0
Non-cash financing activities:
Conversion of subordinated debentures	$ 0	$ 56