CONSOLIDATED CONDENSED STATEMENTS OF INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues
Premiums and policy fees	$ 723,200	$ 692,398
Reinsurance ceded	(325,840)	(296,295)
Net of reinsurance ceded	397,360	396,103
Net investment income	439,012	443,532
Realized investment gains (losses):
Derivative financial instruments	3,607	(29,909)
All other investments	(4,246)	35,483
Other-than-temporary impairment losses	(1,340)	(34,099)
Portion recognized in other comprehensive income (before taxes)	(3,244)	15,503
Net impairment losses recognized in earnings	(4,584)	(18,596)
Other income	54,434	75,142
Total revenues	885,583	901,755
Benefits and expenses
Benefits and settlement expenses, net of reinsurance ceded: (2013 - $306,578; 2012 - $282,776)	580,976	587,009
Amortization of deferred policy acquisition costs and value of business acquired	50,039	53,687
Other operating expenses, net of reinsurance ceded: (2013 - $41,746; 2012 - $47,751)	144,754	119,991
Total benefits and expenses	775,769	760,687
Income before income tax	109,814	141,068
Income tax expense	35,936	45,212
Net income	$ 73,878	$ 95,856