INCOME TAXES (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets
Tax loss carryforwards	$ 293,547	$ 285,003
Tax credit carryforwards	77,426	37,141
Scientific Research and Experimental Development pool	65,718	63,893
Research and development tax credits	67,683	62,766
Provisions	211,486	121,288
Plant, equipment and technology	7,478	11,440
Deferred revenue	60,850	22,414
Deferred financing and share issue costs	118,369	50,097
Share-based compensation	19,828	17,808
Other	23,453	15,599
Total deferred tax assets	945,838	687,449
Less valuation allowance	(124,515)	(128,742)
Net deferred tax assets	821,323	558,707
Deferred tax liabilities
Intangible assets	1,801,515	1,545,807
Deferred tax liability on 5.375% Convertible Notes		2,268
Prepaid expenses	1,094	441
Total deferred tax liabilities	1,802,609	1,548,516
Net deferred income taxes	$ (981,286)	$ (989,809)