Financing Arrangements (Tables)

9 Months Ended

Feb. 29, 2012

Financing Arrangements

Summary of recourse and non-recourse debt

	February 29,			May 31,
	2012			2011
Recourse debt:
Revolving credit facility expiring April 12, 2016 with interest payable monthly (see Note 8)	$	300,000		$	100,000
Revolving credit facility (secured by aircraft and related engines and components) due April 23, 2015 with floating interest rate, payable monthly	60,504			54,940
Revolving credit facility expiring March 9, 2012 with interest payable monthly	1,589			—
Note payable due July 19, 2012 with interest at 7.22%, payable monthly	8,907			2,217
Mortgage loan (secured by Wood Dale, Illinois facility) due August 1, 2015 with interest at 5.01%	11,000			11,000
Notes payable due January 15, 2022 with interest at 7.25% payable semi-annually on January 15 and July 15	171,986			—
Convertible notes payable due March 1, 2014 with interest at 1.625% payable semi-annually on March 1 and September 1	76,170			73,418
Convertible notes payable due March 1, 2016 with interest at 2.25% payable semi-annually on March 1 and September 1	53,090			51,309
Convertible notes payable due February 1, 2026 with interest at 1.75% payable semi-annually on February 1 and August 1	112,736			107,420
Industrial revenue bond (secured by trust indenture on property, plant and equipment) due August 1, 2018 with floating interest rate, payable monthly	25,000			25,000
Total recourse debt	820,982			425,304
Current maturities of recourse debt	(221,661		)	(111,323		)
Long-term recourse debt	$	599,321		$	313,981
Non-recourse debt:
Non-recourse note payable due December 8, 2011 with interest at 13.0%	$	—		$	—
Non-recourse note payable due July 19, 2012 with interest at 7.22%	—			8,201
Non-recourse note payable due April 3, 2015 with interest at 8.38%	—			3,654
Total non-recourse debt	—			11,855
Current maturities of non-recourse debt	—			(823		)
Long-term non-recourse debt	$	—		$	11,032

Schedule of redemption prices of the notes

Year	Redemption Price
2017	103.625	%
2018	102.417	%
2019	101.208	%
2020 and thereafter	100.000	%

Schedule of the long-term debt and equity component (recorded in capital surplus, net of income tax benefit) of convertible notes

	February 29,			May 31,
	2012			2011
Long-term debt:
Principal amount	$	268,380		$	268,380
Unamortized discount	(26,384		)	(36,233		)
Net carrying amount	$	241,996		$	232,147
Equity component, net of tax	$	74,966		$	74,966

Schedule of interest expense associated with the convertible notes

	Three Months Ended				Nine Months Ended
	February 29/28,				February 29/28,
	2012		2011		2012		2011
Coupon interest	$	1,229	$	1,229	$	3,685	$	3,704
Amortization of deferred financing fees	189		189		565		566
Amortization of discount	3,346		3,098		9,848		9,149
Interest expense related to convertible notes	$	4,764	$	4,516	$	14,098	$	13,419