CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Flows from Operating Activities:
Net income	$ 255,505	$ 334,960
Change in operating assets and liabilities, net of acquisition:
Accrued investment income	(26,656)	(9,588)
Premiums receivable and other reinsurance balances	(19,683)	(104,002)
Deferred policy acquisition costs	5,136	165,257
Reinsurance ceded receivable balances	(115,355)	(27,310)
Future policy benefits, other policy claims and benefits, and other reinsurance balances	353,946	581,812
Deferred income taxes	77,047	111,735
Other assets and other liabilities, net	42,363	34,577
Amortization of net investment premiums, discounts and other	(39,021)	(51,521)
Investment related gains, net	8,595	(203,098)
Excess tax benefits from share-based payment arrangement	0	(1,268)
Other, net	63,815	76,256
Net cash provided by operating activities	605,692	907,810
Cash Flows from Investing Activities:
Sales of fixed maturity securities available-for-sale	2,742,814	2,756,942
Maturities of fixed maturity securities available-for-sale	232,712	239,279
Principal payments on mortgage loans on real estate	166,583	200,601
Principal payments on policy loans	441	46,747
Purchases of fixed maturity securities available-for-sale	(2,806,351)	(3,302,047)
Cash invested in mortgage loans on real estate	(531,317)	(266,002)
Cash invested in policy loans	(686)	(52,913)
Cash invested in funds withheld at interest	(57,708)	(39,856)
Payments to Acquire Businesses, Net of Cash Acquired	191,450	0
Payments to Acquire Property, Plant, and Equipment	(22,944)	(43,295)
Increase (Decrease) in Payables under Repurchase Agreements	(101,203)	0
Change in short-term investments	22,543	93,798
Change in other invested assets	73,529	271,373
Net cash used in investing activities	(473,037)	(95,373)
Cash Flows from Financing Activities:
Dividends to stockholders	(44,519)	(41,955)
Proceeds from (Repayments of) Secured Debt	(17,632)	0
Repayments of Short-term Debt	0	(110,000)
Proceeds from Issuance of Secured Debt	160,060	0
Payments of Debt Issuance Costs	(1,170)	0
Repayments of Long-term Debt	(1,178)	0
Purchases of treasury stock	(262,515)	(179,592)
Excess tax benefits from share-based payment arrangement	0	1,268
Exercise of stock options, net	12,641	9,578
Change in cash collateral for derivative positions and other arrangements	(31,244)	47,561
Deposits on universal life and other investment type policies and contracts	132,679	51,257
Withdrawals on universal life and other investment type policies and contracts	(363,600)	(374,567)
Net cash used in financing activities	(416,478)	(376,450)
Effect of exchange rate changes on cash	(26,185)	18,483
Change in cash and cash equivalents	(310,008)	454,470
Cash and cash equivalents, beginning of period	1,645,669	923,647
Cash and cash equivalents, end of period	1,335,661	1,378,117
Supplemental disclosures of cash flow information:
Interest Paid	74,637	67,258
Income Taxes Paid, Net	(19,307)	26,732
Transfer to Investments	118	1,580,080
Capital Expenditures Incurred but Not yet Paid	2,121	0
Noncash or Part Noncash Acquisition, Value of Assets Acquired	3,681,699	0
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed	(3,490,249)	$ 0
Payments to Acquire Businesses, Gross	191,450
Cash Acquired from Acquisition	$ 19,377