CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Change in net unrealized gains (losses) on investments, income tax	$ (145,224)	$ 205,978	$ (641,532)	$ 384,084
Reclassification adjustment for investment amounts included in net income, income tax	(653)	(4,931)	(9,488)	(6,266)
Change in net unrealized gains (losses) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, income tax	(1,543)	12,808	1,383	15,770
Change in accumulated (loss) gain - derivatives, income tax	8	1,028	(55)	1,424
Reclassification adjustment for derivative amounts included in net income, income tax	200	385	577	961
Change in postretirement benefits liability adjustment, income tax	$ (922)	$ (728)	$ (2,766)	$ (2,183)