CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Net premiums	$ 2,089,345	$ 2,168,285	$ 6,242,240	$ 6,452,082
Investment income, net of related expenses	389,597	447,106	1,267,027	1,262,088
Investment related gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(23,111)	(246)	(29,775)	(1,419)
Other investment related gains (losses), net	(88,235)	22,564	(90,166)	226,835
Total investment related gains (losses), net	(111,346)	22,318	(119,941)	225,416
Other revenues	71,038	78,879	200,261	267,195
Total revenues	2,438,634	2,716,588	7,589,587	8,206,781
Benefits and Expenses:
Claims and other policy benefits	1,831,819	1,855,037	5,473,453	5,540,599
Interest credited	34,008	120,952	231,932	347,508
Policy acquisition costs and other insurance expenses	249,702	336,411	827,157	1,100,658
Other operating expenses	142,270	133,737	395,488	372,135
Interest expense	35,565	36,065	107,043	106,360
Collateral finance and securitization expense	5,133	2,571	16,462	7,731
Total benefits and expenses	2,298,497	2,484,773	7,051,535	7,474,991
Income before income taxes	140,137	231,815	538,052	731,790
Provision for income taxes	56,603	73,819	199,013	238,834
Net income	$ 83,534	$ 157,996	$ 339,039	$ 492,956
Earnings per share:
Basic earnings per share	$ 1.26	$ 2.30	$ 5.07	$ 7.10
Diluted earnings per share	1.25	2.28	5.01	7.03
Dividends declared per share	$ 0.37	$ 0.33	$ 1.03	$ 0.93