CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net Loss	$ (927,079)	$ (485,892)	$ (363,735)
Other comprehensive income (loss), net of tax (note 3):
Unrealized holding (losses) gains for the period included in accumulated other comprehensive income (loss)	(12,646)	68,822	(7,534)
Less: net gains (losses) reclassified out of accumulated other comprehensive income (loss) into earnings for the period	66,013	47,765	61,540
Change in unrealized investment gains and losses (note 6)	(78,659)	21,057	(69,074)
Amortization related to benefit plans (note 13)	(1,221)	(12,862)	6,390
Foreign currency translation adjustment	1,593	(207)	10,665
Other comprehensive (loss) income, net of tax	(78,287)	7,988	(52,019)
Total comprehensive loss	$ (1,005,366)	$ (477,904)	$ (415,754)