INCOME TAXES (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Deferred tax assets
Tax loss carryforwards	$ 285,003	$ 272,172
Tax credit carryforwards	37,141	36,160
Scientific Research and Experimental Development pool	63,893	66,577
Research and development tax credits	62,766	66,201
Provisions	121,288	100,320
Plant, equipment and technology	11,440	33,736
Deferred revenue	22,414	27,888
Deferred financing and share issue costs	50,097	65,620
Share-based compensation	17,808	9,783
Other	15,599	15,694
Total deferred tax assets	687,449	694,151
Less valuation allowance	(128,742)	(186,399)
Net deferred tax assets	558,707	507,752
Deferred tax liabilities
Intangible assets	1,502,215	1,779,460
Deferred tax liability on 5.375% Convertible Notes	2,268	8,171
Prepaid expenses	441	510
Total deferred tax liabilities	1,504,924	1,788,141
Net deferred income taxes	$ (946,217)	$ (1,280,389)