Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenue:
Life premium	$ 573,836	$ 548,590	$ 1,149,673	$ 1,092,741
Health premium	242,775	237,252	487,566	472,949
Other premium	3	13	6	25
Total premium	816,614	785,855	1,637,245	1,565,715
Net investment income	212,776	201,642	421,058	398,695
Realized investment gains (losses)	(705)	4,005	(6,453)	4,298
Other income	393	382	809	803
Total revenue	1,029,078	991,884	2,052,659	1,969,511
Benefits and expenses:
Life policyholder benefits	390,859	369,342	781,938	732,202
Health policyholder benefits	156,579	153,261	314,330	306,036
Other policyholder benefits	8,977	8,882	17,923	18,220
Total policyholder benefits	556,415	531,485	1,114,191	1,056,458
Amortization of deferred acquisition costs	122,121	117,245	248,029	236,051
Commissions, premium taxes, and non-deferred acquisition costs	65,032	62,854	130,148	124,456
Other operating expense	62,428	57,846	124,769	115,275
Interest expense	21,156	23,110	41,855	42,479
Total benefits and expenses	827,152	792,540	1,658,992	1,574,719
Income before income taxes	201,926	199,344	393,667	394,792
Income taxes	(61,563)	(60,050)	(116,126)	(121,924)
Income from continuing operations	140,363	139,294	277,541	272,868
Income (loss) from discontinued operations, net of tax	(90)	(865)	(3,727)	(10,406)
Net income	$ 140,273	$ 138,429	$ 273,814	$ 262,462
Basic net income (loss) per common share:
Continuing operations (in dollars per share)	$ 1.20	$ 1.16	$ 2.37	$ 2.26
Discontinued operations (in dollars per share)	0.00	(0.01)	(0.03)	(0.09)
Total basic net income per common share (in dollars per share)	1.20	1.15	2.34	2.17
Diluted net income (loss) per common share:
Continuing operations (in dollars per share)	1.18	1.13	2.32	2.22
Discontinued operations (in dollars per share)	0.00	0.00	(0.03)	(0.09)
Total diluted net income per common share (in dollars per share)	1.18	1.13	2.29	2.13
Dividends declared per common share (in dollars per share)	$ 0.15	$ 0.14	$ 0.3	$ 0.28