Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014		Jun. 30, 2015	Jun. 30, 2014	[1]
Revenue:
Life premium	$ 520,038	$ 491,952	[1]	$ 1,033,380	$ 981,010
Health premium	315,492	307,791	[1]	632,257	637,654
Other premium	37	123	[1]	78	222
Total premium	835,567	799,866	[1]	1,665,715	1,618,886
Net investment income	194,823	189,930	[1]	386,419	377,981
Realized investment gains	2,613	577	[1]	2,732	17,196
Other income	691	663	[1]	1,360	1,144
Total revenue	1,033,694	991,036	[1]	2,056,226	2,015,207
Benefits and expenses:
Life policyholder benefits	347,364	324,192	[1]	687,065	644,368
Health policyholder benefits	235,175	220,554	[1]	477,326	476,272
Other policyholder benefits	9,754	10,461	[1]	19,799	21,084
Total policyholder benefits	592,293	555,207	[1]	1,184,190	1,141,724
Amortization of deferred acquisition costs	112,904	104,561	[1]	224,167	209,294
Commissions, premium taxes, and non-deferred acquisition costs	64,018	62,020	[1]	127,286	121,398
Other operating expense	56,977	56,400	[1]	113,589	113,356
Interest expense	19,114	19,037	[1]	38,174	38,086
Total benefits and expenses	845,306	797,225	[1]	1,687,406	1,623,858
Income before income taxes	188,388	193,811	[1]	368,820	391,349
Income taxes	(61,278)	(62,888)	[1]	(120,062)	(127,570)
Net income	$ 127,110	$ 130,923		$ 248,758	$ 263,779
Basic net income per share	$ 1.01	$ 1.00	[1]	$ 1.97	$ 1.99
Diluted net income per share	1.00	0.98	[1]	1.94	1.97
Dividends declared per common share	$ 0.14	$ 0.13	[1]	$ 0.27	$ 0.25

[1] Certain balances were retrospectively adjusted to give effect to the adoption of new accounting guidance as described in Note G- Adoption of New Accounting Standards