CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Net premiums	$ 2,129,043	$ 2,183,160	$ 4,152,895	$ 4,283,797
Investment income, net of related expenses	450,539	410,607	877,430	814,982
Investment related gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(4,137)	(870)	(6,664)	(1,173)
Other investment related gains (losses), net	(12,041)	119,397	(1,931)	204,271
Total investment related gains (losses), net	(16,178)	118,527	(8,595)	203,098
Other revenues	66,936	120,726	129,223	188,316
Total revenues	2,630,340	2,833,020	5,150,953	5,490,193
Benefits and Expenses:
Claims and other policy benefits	1,866,183	1,841,885	3,641,634	3,685,562
Interest credited	77,246	115,962	197,924	226,556
Policy acquisition costs and other insurance expenses	300,412	409,374	577,455	764,247
Other operating expenses	131,600	127,462	253,218	238,398
Interest expense	35,851	35,211	71,478	70,295
Collateral finance and securitization expense	5,258	2,591	11,329	5,160
Total benefits and expenses	2,416,550	2,532,485	4,753,038	4,990,218
Income before income taxes	213,790	300,535	397,915	499,975
Provision for income taxes	83,399	102,239	142,410	165,015
Net income	$ 130,391	$ 198,296	$ 255,505	$ 334,960
Earnings per share:
Basic earnings per share	$ 1.97	$ 2.87	$ 3.80	$ 4.80
Diluted earnings per share	1.94	2.84	3.76	4.75
Dividends declared per share	$ 0.33	$ 0.30	$ 0.66	$ 0.60