Accounts Receivable and Inventory

12 Months Ended

Dec. 31, 2011

Accounts Receivable, Net [Abstract]

Accounts Receivable

5. Accounts Receivable and Inventory

Accounts Receivable

	As at December 31,
(Thousands of U.S. Dollars)	2011		2010
Trade	$	45,922		$	34,182
Other		23,440			8,853
Total	$	69,362		$	43,035

Inventory

Oil and supplies inventories at December 31, 2011 are $4.7 million and $2.4 million, respectively (2010 - $3.6 million and $2.1 million, respectively).