Supplemental cash flow information

3 Months Ended

12 Months Ended

Jul. 31, 2012

Apr. 30, 2012

Supplemental cash flow information

12. Supplemental cash flow information:

	Three months ended
	July 31, 2012		July 31, 2011
Cash interest paid	$	2,822	$	2,715
Cash taxes paid		6,576		5,668
Assets acquired through non-cash capital leases		—		48,529

Change in cash resulting from changes in operating assets and liabilities:

	Three months ended
	July 31, 2012			July 31, 2011
Receivables, net of allowance	$	(37,615	)	$	(46,855	)
Income taxes		(4,643	)		3,782
Inventory		(3,524	)		2,702
Prepaid expenses		(2,609	)		(8,162	)
Payables and accruals		(10,620	)		(11,934	)
Deferred revenue		5,375			(2,314	)
Other assets and liabilities		(944	)		(4,102	)
	$	(54,580	)	$	(66,883	)

22. Supplemental cash flow information:

	For the year ended
	April 30, 2012		April 30, 2011		April 30, 2010
Cash interest paid	$	110,163	$	132,453	$	63,413
Cash taxes paid		15,584		21,986		21,205
Extinguishment of shareholder loan on redemption of capital stock		—		—		7,808
Assets acquired through non-cash capital leases		48,529		126,415		—
Assets under construction related to aircraft purchase contracts novated to lessors		—		—		45,306

Change in cash resulting from changes in operating assets and liabilities:

	For the year ended
	April 30, 2012			April 30, 2011			April 30, 2010
Receivables	$	(38,397	)	$	(37,614	)	$	(14,971	)
Income taxes		5,170			(8,693	)		25,341
Inventory		5,007			(8,021	)		2,866
Prepaid expenses		(4,335	)		6,894			(14,088	)
Payable and accruals		12,407			26,071			1,208
Deferred revenue		4,645			14,057			(1,519	)
Other assets and liabilities		(7,123	)		(5,388	)		(1,530	)
	$	(22,626	)	$	(12,694	)	$	(2,693	)