CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Net premiums	$ 2,168,285	$ 2,026,180	$ 6,452,082	$ 6,041,029
Investment income, net of related expenses	447,106	369,366	1,262,088	1,238,731
Investment related gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(246)	(391)	(1,419)	(10,396)
Other-than-temporary impairments on fixed maturity securities transferred to (from) accumulated other comprehensive income	0	59	0	(247)
Other investment related gains (losses), net	22,564	(76,133)	226,835	76,792
Total investment related gains (losses), net	22,318	(76,465)	225,416	66,149
Other revenues	78,879	70,734	267,195	235,650
Total revenues	2,716,588	2,389,815	8,206,781	7,581,559
Benefits and Expenses:
Claims and other policy benefits	1,855,037	1,714,899	5,540,599	5,434,383
Interest credited	120,952	59,939	347,508	303,767
Policy acquisition costs and other insurance expenses	336,411	268,081	1,100,658	995,943
Other operating expenses	133,737	111,672	372,135	344,581
Interest expense	36,065	30,831	106,360	89,235
Collateral finance facility expense	2,571	2,698	7,731	7,886
Total benefits and expenses	2,484,773	2,188,120	7,474,991	7,175,795
Income before income taxes	231,815	201,695	731,790	405,764
Provision for income taxes	73,819	63,740	238,834	131,886
Net income	$ 157,996	$ 137,955	$ 492,956	$ 273,878
Earnings per share:
Basic earnings per share	$ 2.30	$ 1.95	$ 7.10	$ 3.79
Diluted earnings per share	$ 2.28	$ 1.93	$ 7.03	$ 3.76
Dividends declared per share	$ 0.33	$ 0.30	$ 0.93	$ 0.78