CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Premiums and policy fees	$ 883,413	$ 855,579
Reinsurance ceded	(345,624)	(319,055)
Net of reinsurance ceded	537,789	536,524
Net investment income	489,418	474,709
Realized investment gains (losses):
Derivative financial instruments	46,826	(60,900)
All other investments	(87,551)	22,841
Other-than-temporary impairment losses	(691)	(95)
Portion recognized in other comprehensive income (before taxes)	(2,954)	(5,106)
Net impairment losses recognized in earnings	(3,645)	(5,201)
Other income	80,674	79,383
Total revenues	1,063,511	1,047,356
Benefits and expenses
Benefits and settlement expenses, net of reinsurance ceded: (2018 - $345,826; 2017 - $261,400)	786,349	749,450
Amortization of deferred policy acquisition costs and value of business acquired	58,073	20,784
Other operating expenses, net of reinsurance ceded: (2018 - $44,069; 2017 - $51,761)	197,153	190,478
Total benefits and expenses	1,041,575	960,712
Income before income tax	21,936	86,644
Income tax expense	3,661	28,305
Net income	$ 18,275	$ 58,339