Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Premium	$ 899,993	$ 860,750	$ 2,688,450	$ 2,564,835
Net investment income	228,905	221,627	683,003	658,279
Realized gains (losses)	11,943	1,032	18,426	14,796
Other income	438	393	1,077	1,104
Total revenue	1,141,279	1,083,802	3,390,956	3,239,014
Benefits and expenses:
Life policyholder benefits	406,963	396,701	1,227,616	1,196,616
Health policyholder benefits	170,875	162,574	511,403	483,654
Other policyholder benefits	7,854	8,581	23,792	25,852
Total policyholder benefits	585,692	567,856	1,762,811	1,706,122
Amortization of deferred acquisition costs	138,449	129,492	412,436	388,189
Commissions, premium taxes, and non-deferred acquisition costs	74,139	69,632	221,302	208,698
Other operating expense	74,575	74,059	226,412	209,503
Interest expense	21,094	22,433	63,804	66,466
Total benefits and expenses	893,949	863,472	2,686,765	2,578,978
Income before income taxes	247,330	220,330	704,191	660,036
Income tax benefit (expense)	(45,512)	(41,630)	(130,370)	(123,232)
Income from continuing operations	201,818	178,700	573,821	536,804
Income (loss) from discontinued operations, net of tax	0	24	(92)	(55)
Net income	$ 201,818	$ 178,724	$ 573,729	$ 536,749
Basic net income (loss) per common share:
Continuing operations (in dollars per share)	$ 1.85	$ 1.59	$ 5.24	$ 4.74
Discontinued operations (in dollars per share)	0	0	0	(0.01)
Total basic net income per common share (in dollars per share)	1.85	1.59	5.24	4.73
Diluted net income (loss) per common share:
Continuing operations (in dollars per share)	1.82	1.55	5.14	4.64
Discontinued operations (in dollars per share)	0	0	0	0
Total diluted net income per common share (in dollars per share)	$ 1.82	$ 1.55	$ 5.14	$ 4.64
Life premium
Revenue:
Premium	$ 630,824	$ 605,547	$ 1,886,314	$ 1,806,384
Health premium
Revenue:
Premium	269,166	255,201	802,132	758,439
Other premium
Revenue:
Premium	$ 3	$ 2	$ 4	$ 12