CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Premiums and policy fees	$ 941,868	$ 868,139	$ 1,831,034	$ 1,728,725
Reinsurance ceded	(390,941)	(342,898)	(736,364)	(658,974)
Net of reinsurance ceded	550,927	525,241	1,094,670	1,069,751
Net investment income	616,462	507,771	1,137,325	1,014,184
Realized investment gains (losses):
Derivative financial instruments	12,265	(108,188)	90,324	(178,066)
All other investments	(49,602)	53,717	(137,201)	76,558
Other-than-temporary impairment losses	(10)	(33)	(701)	(2,758)
Portion recognized in other comprehensive income (before taxes)	5	(2,752)	(2,949)	(7,858)
Net impairment losses recognized in earnings	(5)	(2,785)	(3,650)	(10,616)
Other income	113,861	111,311	228,272	220,553
Total revenues	1,243,908	1,087,067	2,409,740	2,192,364
Benefits and expenses
Benefits and settlement expenses, net of reinsurance ceded: (three and six months 2018 - $298,016 and $645,653; three and six months 2017 - $286,234 and $549,611)	861,548	712,361	1,648,350	1,462,003
Amortization of deferred policy acquisition costs and value of business acquired	52,517	23,102	110,498	43,621
Other operating expenses, net of reinsurance ceded: (three and six months 2018 - $51,559 and $94,676; three and six months 2017 - $53,305 and $104,322)	231,071	225,836	460,322	448,623
Total benefits and expenses	1,145,136	961,299	2,219,170	1,954,247
Income before income tax	98,772	125,768	190,570	238,117
Income tax expense	17,277	41,500	34,963	78,435
Net income	$ 81,495	$ 84,268	$ 155,607	$ 159,682