CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Premiums and policy fees	$ 871,892	$ 849,743	$ 2,691,233	$ 2,568,228
Reinsurance ceded	(267,910)	(326,572)	(1,005,398)	(989,835)
Net of reinsurance ceded	603,982	523,171	1,685,835	1,578,393
Net investment income	631,955	477,011	1,699,787	1,427,442
Realized investment gains (losses):
Derivative financial instruments	(26,710)	5,302	37,176	(119,392)
All other investments	(20,156)	18,150	(157,350)	94,526
Other-than-temporary impairment losses	(14)	(366)	(715)	(494)
Portion recognized in other comprehensive income (before taxes)	0	93	(2,949)	(7,765)
Net impairment losses recognized in earnings	(14)	(273)	(3,664)	(8,259)
Other income	80,906	82,031	241,334	243,501
Total revenues	1,269,963	1,105,392	3,503,118	3,216,211
Benefits and expenses
Benefits and settlement expenses, net of reinsurance ceded: (three months: 2018 - $214,326; 2017 - $255,063; nine months: 2018 - $855,929; 2017 - $800,868)	950,942	742,789	2,598,151	2,203,883
Amortization of deferred policy acquisition costs and value of business acquired	33,469	4,267	144,172	48,505
Other operating expenses, net of reinsurance ceded: (three months: 2018 - $50,067; 2017 - $58,009; nine months: 2018 - $152,694; 2017 - $163,902)	190,382	192,354	582,795	577,911
Total benefits and expenses	1,174,793	939,410	3,325,118	2,830,299
Income before income tax	95,170	165,982	178,000	385,912
Income tax expense	16,646	49,016	28,933	120,975
Net income	$ 78,524	$ 116,966	$ 149,067	$ 264,937