CONSOLIDATED CONDENSED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues
Premiums and policy fees	$ 759,038	$ 657,218	$ 2,426,736	$ 2,140,396
Reinsurance ceded	(277,136)	(270,730)	(947,817)	(996,570)
Net of reinsurance ceded	481,902	386,488	1,478,919	1,143,826
Net investment income	558,174	454,275	1,647,153	1,378,129
Realized investment gains (losses):
Derivative financial instruments	3,781	41,326	(191,495)	192,592
All other investments	1,194	(19,508)	153,456	(133,631)
Other-than-temporary impairment losses	(1,142)	(6,635)	(2,026)	(9,764)
Portion recognized in other comprehensive income (before taxes)	(1,212)	(2,046)	(3,379)	(7,501)
Net impairment losses recognized in earnings	(2,354)	(8,681)	(5,405)	(17,265)
Other income	105,389	98,794	311,359	278,213
Total revenues	1,148,086	952,694	3,393,987	2,841,864
Benefits and expenses
Benefits and settlement expenses, net of reinsurance ceded: (three months: 2014 - $217,641; 2013 - $204,065; nine months: 2014 - $851,028; 2013 - $882,123)	630,285	624,577	2,106,620	1,764,323
Amortization of deferred policy acquisition costs and value of business acquired	134,918	22,446	242,031	149,631
Other operating expenses, net of reinsurance ceded: (three months: 2014 - $49,196; 2013 - $47,506; nine months: 2014 - $139,507; 2013 - $138,901)	198,000	163,550	573,038	511,149
Total benefits and expenses	963,203	810,573	2,921,689	2,425,103
Income before income tax	184,883	142,121	472,298	416,761
Income tax expense	65,974	49,060	161,773	142,210
Net income	$ 118,909	$ 93,061	$ 310,525	$ 274,551
Net income - basic (in dollars per share)	$ 1.48	$ 1.17	$ 3.88	$ 3.46
Net income - diluted (in dollars per share)	$ 1.46	$ 1.15	$ 3.82	$ 3.39
Cash dividends paid per share (in dollars per share)	$ 0.24	$ 0.20	$ 0.68	$ 0.58
Average shares outstanding - basic (in shares)	80,231,591	79,492,274	79,942,018	79,346,771
Average shares outstanding - diluted (in shares)	81,458,870	80,852,078	81,261,249	80,882,552