Long-Term Debt and Capital Lease Obligations (Tables)

9 Months Ended

12 Months Ended

Jan. 31, 2013

Apr. 30, 2012

Long-Term Debt and Capital Lease Obligations

	Principal Repayment terms		Facility maturity dates		January 31, 2013			April 30, 2012
Senior secured notes		At maturity		October 2020		1,287,005			1,084,109
Revolving credit facility:
US LIBOR plus a 4.5% margin		At maturity		October 2015		110,000			125,000
Alternate Base Rate plus a 3.5% margin		At maturity		October 2015		22,144			—
Other term loans:
Eurocopter Loan - 2.50%		At maturity		December 2015		2,295			4,623
EDC-B.A. CDOR rate (6 month) plus a 0.8% margin		Semi-annually		June 2014		1,629			2,745
EDC-B.A. CDOR rate (6 month) plus a 0.8% margin		Semi-annually		April 2018		—			10,476
Capital lease obligations		Quarterly		March 2013 - October 2017		47,894			26,922
Boundary Bay financing - 6.93%		Monthly		April 2035		32,359			33,205
Total long-term debt and capital lease obligations						1,503,326			1,287,080
Less: current portion						(24,104	)		(17,701	)
Long-term debt and capital lease obligations						1,479,222			1,269,379

	Principal Repayment terms		Facility maturity dates		2012			2011
Senior secured notes		At maturity		October 2020	$	1,084,109		$	1,082,936
Revolving credit facility:
US LIBOR plus margin (i)		At maturity		October 2015		125,000			70,000
Other term loans:
Eurocopter Loan - 2.50%		At maturity		June 2011		—			1,618
Eurocopter Loan - 2.50%		On demand		—		4,623			—
EDC US loan - 5.04%		Semi-annually		November 2011		—			1,959
EDC-B.A. CDOR rate (6 month) plus margin (i)		Semi-annually		June 2014		2,745			3,993
EDC-B.A. CDOR rate (6 month) plus margin (i)		Semi-annually		April 2018		10,476			13,609
Capital lease obligations		Quarterly		June 2012 - May 2014		26,922			117,371
Boundary Bay Financing - 6.93%		Monthly		April 2035		33,205			—
Total long-term debt						1,287,080			1,291,486
Less: current portion						(17,701	)		(106,642	)
Long-term					$	1,269,379		$	1,184,844

(i) Margins range from 0.8% to 4.5% during the year ended April 30, 2012 (2011 – 0.8% to 3.75%)