Changes in Non-Cash Working Capital

3 Months Ended

Jun. 30, 2013

10. Changes in Non-Cash Working Capital

Changes in non-cash working capital for the three months ended June 30, 2013 and 2012 consists of the following:

	Three Months Ended
	June 30,
	2013			2012

Margin deposits	$	11,551		$	(22,321	)
Trade receivables	960			2,110
Accrued receivables	77,427			22,920
Natural gas inventory	(45,693		)	7,216
Prepaid expenses and other current assets	1,538			(954		)
Other assets	(63		)	—
Trade payables	336			(489		)
Accrued liabilities	32,428			8,306
Deferred revenue	6,261			(11,235		)
Other long-term liabilities	(79		)	—
Total	$	84,666		$	5,553

During the three months ended June 30, 2012, changes in non-cash working capital include the receipt of proceeds of $14.2 million (June 30, 2013 - $ nil) from sales of cushion gas. The Company included such proceeds in cash flows from operations since the predominant source of cash flows for natural gas purchases and sales are operating in nature.