Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Life premium	$ 598,303	$ 575,837
Health premium	251,798	244,791
Other premium	5	3
Total premium	850,106	820,631
Net investment income	218,084	208,282
Realized investment gains (losses)	1,951	(5,748)
Other income	295	416
Total revenue	1,070,436	1,023,581
Benefits and expenses:
Life policyholder benefits	400,581	391,079
Health policyholder benefits	160,619	157,751
Other policyholder benefits	8,689	8,946
Total policyholder benefits	569,889	557,776
Amortization of deferred acquisition costs	129,620	125,908
Commissions, premium taxes, and non-deferred acquisition costs	69,639	65,116
Other operating expense	66,824	62,341
Interest expense	21,622	20,699
Total benefits and expenses	857,594	831,840
Income before income taxes	212,842	191,741
Income taxes	(39,131)	(54,563)
Income from continuing operations	173,711	137,178
Income (loss) from discontinued operations, net of tax	(111)	(3,637)
Net income	$ 173,600	$ 133,541
Basic net income (loss) per common share:
Continuing operations (in dollars per share)	$ 1.52	$ 1.16
Discontinued operations (in dollars per share)	0.00	(0.03)
Total basic net income per common share (in dollars per share)	1.52	1.13
Diluted net income (loss) per common share:
Continuing operations (in dollars per share)	1.49	1.14
Discontinued operations (in dollars per share)	0.00	(0.03)
Total diluted net income per common share (in dollars per share)	1.49	1.11
Dividends declared per common share (in dollars per share)	$ 0.16	$ 0.15