AVAILABLE-FOR-SALE SECURITIES (Tables)

3 Months Ended

Mar. 31, 2013

AVAILABLE-FOR-SALE SECURITIES

Schedule of available-for-sale securities

	As at March 31, 2013			As at December 31, 2012
Available-for-sale securities in an unrealized gain position:
Cost (net of impairments)	$	38,387		$	4,352
Unrealized gains in accumulated other comprehensive loss		4,753			1,902
Estimated fair value		43,140			6,254
Available-for-sale securities in an unrealized loss position:
Cost (net of impairments)		13,654			48,047
Unrealized losses in accumulated other comprehensive loss		(1,485	)		(9,582	)
Estimated fair value		12,169			38,465
Total estimated fair value of available-for-sale securities	$	55,309		$	44,719