AVAILABLE-FOR-SALE SECURITIES (Tables)

6 Months Ended

Jun. 30, 2013

AVAILABLE-FOR-SALE SECURITIES

Schedule of available-for-sale securities

	As at June 30, 2013			As at December 31, 2012
Available-for-sale securities in an unrealized gain position:
Cost (net of impairments)	$	35,745		$	4,352
Unrealized gains in accumulated other comprehensive loss		4,327			1,902
Estimated fair value		40,072			6,254
Available-for-sale securities in an unrealized loss position:
Cost (net of impairments)		33,287			48,047
Unrealized losses in accumulated other comprehensive loss		(4,554	)		(9,582	)
Estimated fair value		28,733			38,465
Total estimated fair value of available-for-sale securities	$	68,805		$	44,719