CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income	$ 118,909	$ 93,061	$ 310,525	$ 274,551
Other comprehensive income (loss):
Change in net unrealized gains (losses) on investments, net of income tax: (three months: 2014 - $(44,766); 2013 - $(145,224); nine months: 2014 - $431,299; 2013 - $(641,532))	(83,138)	(269,703)	800,982	(1,191,416)
Reclassification adjustment for investment amounts included in net income, net of income tax: (three months: 2014 - $(7,446); 2013 - $(653); nine months: 2014 - $(16,027); 2013 - $(9,488))	(13,827)	(1,212)	(29,763)	(17,621)
Change in net unrealized gains (losses) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, net of income tax: (three months: 2014 - $561; 2013 - $(1,543) nine months: 2014 - $2,419; 2013 - $1,383)	1,044	(2,865)	4,494	2,570
Change in accumulated (loss) gain - derivatives, net of income tax: (three months: 2014 - $(22); 2013 - $8; nine months: 2014 - $(31); 2013 - $(55))	(41)	14	(58)	(103)
Reclassification adjustment for derivative amounts included in net income, net of income tax: (three months: 2014 - $103; 2013 - $200; nine months: 2014 - $552; 2013 - $577)	190	372	1,025	1,072
Change in postretirement benefits liability adjustment, net of income tax: (three months: 2014 - $631; 2013 - $(922); nine months: 2014 - $1,895; 2013 - $(2,766))	1,173	(1,712)	3,520	(5,136)
Total other comprehensive income (loss)	(94,599)	(275,106)	780,200	(1,210,634)
Total comprehensive income (loss)	$ 24,310	$ (182,045)	$ 1,090,725	$ (936,083)