Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2016	[1]	Jun. 30, 2015	[2]	Jun. 30, 2016	[1]	Jun. 30, 2015	[2]
Revenue:
Life premium	$ 548,590		$ 520,038		$ 1,092,741		$ 1,033,380
Health premium	237,252		232,409		472,949		461,082
Other premium	13		37		25		78
Total premium	785,855		752,484		1,565,715		1,494,540
Net investment income	201,642		194,823		398,695		386,419
Realized investment gains	4,005		2,613		4,298		2,732
Other income	382		691		803		1,360
Total revenue	991,884		950,611		1,969,511		1,885,051
Benefits and expenses:
Life policyholder benefits	369,342		347,364		732,202		687,065
Health policyholder benefits	153,261		151,198		306,036		299,227
Other policyholder benefits	8,882		9,754		18,220		19,799
Total policyholder benefits	531,485		508,316		1,056,458		1,006,091
Amortization of deferred acquisition costs	117,245		111,738		236,051		222,398
Commissions, premium taxes, and non-deferred acquisition costs	62,854		59,132		124,456		116,237
Other operating expense	57,846		55,588		115,275		110,951
Interest expense	23,110		19,114		42,479		38,174
Total benefits and expenses	792,540		753,888		1,574,719		1,493,851
Income before income taxes	199,344		196,723		394,792		391,200
Income taxes	(60,050)		(64,196)		(121,924)		(127,895)
Income from continuing operations	139,294		132,527		272,868		263,305
Discontinued operations:
Income (loss) from discontinued operations, net of tax	(865)		(5,417)		(10,406)		(14,547)
Net income	$ 138,429		$ 127,110		$ 262,462		$ 248,758
Basic net income per share:
Continuing operations (in dollars per share)	$ 1.16		$ 1.05		$ 2.26		$ 2.08
Discontinued operations (in dollars per share)	(0.01)		(0.04)		(0.09)		(0.11)
Total basic net income per common share (in dollars per share)	1.15		1.01		2.17		1.97
Diluted net income per share:
Continuing operations (in dollars per share)	1.13		1.04		2.22		2.06
Discontinued operations (in dollars per share)	0.00		(0.04)		(0.09)		(0.12)
Total diluted net income per common share (in dollars per share)	1.13		1.00		2.13		1.94
Dividends declared per common share (in dollars per share)	$ 0.14		$ 0.14		$ 0.28		$ 0.27

[1] Due to the adoption of ASU 2016-09, certain balances related to excess tax benefits from stock compensation were adjusted prospectively as described in Note 2—New Accounting Standards.

[2] Certain prior year balances were adjusted to give effect to discontinued operations as described in Note 5—Discontinued Operations.