INCOME TAXES (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Income tax Expense Benefit
Recovery of income taxes recognized	$ 12,624,000	$ (5,400,000)	$ 15,997,000	$ (14,500,000)
Valuation allowance	187,800,000		187,800,000		186,400,000
Unrecognized tax benefits including interest and penalties	112,700,000		112,700,000
Unrecognized tax benefits related to interest and penalties	22,200,000		22,200,000
Portion of unrecognized tax benefits, if recognized, would reduce the Company's effective tax rate	73,800,000		73,800,000
Accrued interest related to unrecognized tax benefits	20,700,000		20,700,000
Accrued penalties related to unrecognized tax benefits	1,500,000		1,500,000
Additional interest and penalties accrued related to income tax	900,000
Maximum amount of anticipated change in unrecognized tax benefits	1,500,000		1,500,000
Canada
Income tax Expense Benefit
Recovery of income taxes recognized	(4,000,000)		(3,800,000)
Outside of Canada
Income tax Expense Benefit
Recovery of income taxes recognized	$ 16,600,000		$ 19,800,000