CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011		Sep. 30, 2012	Sep. 30, 2011
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Change in net unrealized gains (losses) on investments, income tax	$ 205,978	$ 240,855	[1]	$ 384,084	$ 346,225	[1]
Reclassification adjustment for investment amounts included in net income, income tax	(4,931)	(3,814)	[1]	(6,266)	(14,139)	[1]
Change in net unrealized gains (losses) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, income tax	12,808	(509)	[1]	15,770	(9,561)	[1]
Change in accumulated (loss) gain - derivatives, income tax	1,828	(420)	[1]	2,739	1,424	[1]
Reclassification adjustment for derivative amounts included in net income, income tax	(415)	(355)	[1]	(354)	(478)	[1]
Change in postretirement benefits liability adjustment, income tax	$ (728)	$ (451)	[1]	$ (2,183)	$ (1,354)	[1]

[1] Recast from previously reported information