Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenue:
Life premium	$ 1,885,332	$ 1,808,524	$ 1,726,244
Health premium	1,166,410	1,047,379	929,466
Other premium	532	559	608
Total premium	3,052,274	2,856,462	2,656,318
Net investment income	709,743	693,644	693,028
Realized investment gains (losses)	10,668	43,433	25,924
Other-than-temporary impairments	(2,678)	(5,600)	(20)
Other income	1,931	1,577	2,151
Total revenue	3,771,938	3,589,516	3,377,401
Benefits and expenses:
Life policyholder benefits	1,227,857	1,172,020	1,118,909
Health policyholder benefits	817,687	739,541	631,820
Other policyholder benefits	43,302	44,121	42,547
Total policyholder benefits	2,088,846	1,955,682	1,793,276
Amortization of deferred acquisition costs	403,389	385,167	364,583
Commissions, premium taxes, and non-deferred acquisition expenses	221,426	203,986	216,216
Other operating expense	214,690	198,176	201,636
Interest expense	80,461	80,512	77,908
Total benefits and expenses	3,008,812	2,823,523	2,653,619
Income from continuing operations before income taxes	763,126	765,993	723,782
Income taxes	(234,654)	(236,669)	(226,166)
Income from continuing operations	528,472	529,324	497,616
Discontinued operations-loss on disposal, net of tax benefit of $467 in 2011	0	0	(455)
Net income	$ 528,472	$ 529,324	$ 497,161
Basic net income per share:
Continuing operations	$ 5.76	$ 5.48	$ 4.60
Discontinued operations	$ 0.00	$ 0.00	$ (0.01)
Total basic net income per share	$ 5.76	$ 5.48	$ 4.59
Diluted net income per share:
Continuing operations	$ 5.68	$ 5.41	$ 4.53
Discontinued operations	$ 0.00	$ 0.00	$ 0.00
Total diluted net income per share	$ 5.68	$ 5.41	$ 4.53
Dividends declared per common share	$ 0.68	$ 0.60	$ 0.46