AVAILABLE-FOR-SALE SECURITIES (Tables)

3 Months Ended

Mar. 31, 2012

AVAILABLE-FOR-SALE SECURITIES

Schedule of available-for-sale securities

	As at March 31, 2012			As at December 31, 2011
Available-for-sale securities in an unrealized gain position
Cost (net of impairments)	$	17,500		$	127,344
Unrealized gains in accumulated other comprehensive income		6,517			16,408
Estimated fair value		24,017			143,752
Available-for-sale securities in an unrealized loss position
Cost (net of impairments)	$	113,460			1,717
Unrealized losses in accumulated other comprehensive income		(5,098	)		(58	)
Estimated fair value		108,362			1,659
Total estimated fair value of available-for-sale securities	$	132,379		$	145,411