Other financing Charges (income)

3 Months Ended

12 Months Ended

Jul. 31, 2012

Apr. 30, 2012

Other financing charges (income)

8. Other financing charges (income):

	Three months ended
	July 31, 2012			July 31, 2011
Amortization of deferred financing costs	$	1,637		$	1,629
Net loss (gain) on fair value of derivative financial instruments		4,311			(203	)
Amortization of guaranteed residual values		522			410
Interest expense		3,081			420
Interest income		(3,087	)		(3,141	)
Other		1,690			629
	$	8,154		$	(256	)

16. Other financing charges:

	For the year ended
	April 30, 2012			April 30, 2011			April 30, 2010
Write-off of unamortized transaction costs on the senior facility agreement	$	—		$	47,140		$	—
Amortization of deferred financing costs		6,851			7,151			4,036
Loss on interest rate swap		—			8,656			1,182
Net loss (gain) on fair value of derivative financial instruments		5,380			(5,567	)		12,935
Amortization of guaranteed residual values		1,852			1,248			542
Interest expense		8,542			6,672			10,616
Interest income		(12,928	)		(10,802	)		(10,641	)
Other		5,365			12,538			2,789
	$	15,062		$	67,036		$	21,459