Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2016	[1]	Sep. 30, 2015	[2]	Sep. 30, 2016	[1]	Sep. 30, 2015	[2]
Revenue:
Life premium	$ 546,415		$ 518,929		$ 1,639,156		$ 1,552,309
Health premium	236,987		229,139		709,936		690,221
Other premium	9		41		34		119
Total premium	783,411		748,109		2,349,126		2,242,649
Net investment income	202,720		193,213		601,415		579,632
Realized gains	3,482		5,140		7,780		7,872
Other income	160		692		963		2,052
Total revenue	989,773		947,154		2,959,284		2,832,205
Benefits and expenses:
Life policyholder benefits	369,546		342,196		1,101,748		1,029,261
Health policyholder benefits	153,351		149,312		459,387		448,539
Other policyholder benefits	9,255		9,648		27,475		29,447
Total policyholder benefits	532,152		501,156		1,588,610		1,507,247
Amortization of deferred acquisition costs	116,821		111,643		352,872		334,041
Commissions, premium taxes, and non-deferred acquisition costs	61,153		59,918		185,609		176,155
Other operating expense	57,805		56,182		173,080		167,133
Interest expense	20,381		19,246		62,860		57,420
Total benefits and expenses	788,312		748,145		2,363,031		2,241,996
Income before income taxes	201,461		199,009		596,253		590,209
Income taxes	(59,551)		(65,151)		(181,475)		(193,046)
Income from continuing operations	141,910		133,858		414,778		397,163
Discontinued operations:
Income (loss) from discontinued operations, net of tax	9,959		11,528		(447)		(3,019)
Net income	$ 151,869		$ 145,386		$ 414,331		$ 394,144
Basic net income per share:
Continuing operations (in dollars per share)	$ 1.19		$ 1.08		$ 3.44		$ 3.16
Discontinued operations (in dollars per share)	0.08		0.09		0.00		(0.03)
Total basic net income per common share (in dollars per share)	1.27		1.17		3.44		3.13
Diluted net income per share:
Continuing operations (in dollars per share)	1.16		1.06		3.38		3.12
Discontinued operations (in dollars per share)	0.09		0.09		0.00		(0.03)
Total diluted net income per common share (in dollars per share)	1.25		1.15		3.38		3.09
Dividends declared per common share (in dollars per share)	$ 0.14		$ 0.14		$ 0.42		$ 0.41

[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.