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Debt (Tables)

9 Months Ended

Feb. 28, 2014

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

The following table summarizes debt as of the dates indicated:

	Carrying Value				Fair Value				Carrying Value				Fair Value				Carrying Value				Fair Value
	February 28, 2014								May 31, 2013								February 28, 2013
Loan Agreement:
Revolving Loan (interest rate of 1.3%)	$	175.0			$	175.0			$	—			$	—			$	—			$	—
Unsecured lines of credit (weighted average interest    rates of 4.8%, 9.0% and 8.9%, respectively)	$	4.7			$	4.7			$	2.0			$	2.0			$	1.8			$	1.8
5% Notes due 2013, net of discount	—				—				—				—				153.0				153.0
Total debt	$	179.7			$	179.7			$	2.0			$	2.0			$	154.8			$	154.8
Less lines of credit, short-term debt and current portion    of long-term debt	(4.7		)		(4.7		)		(2.0		)		(2.0		)		(1.8		)		(1.8		)
Total long-term debt	$	175.0			$	175.0			$	—			$	—			$	153.0			$	153.0

Schedule of Maturities of Long-term Debt [Table Text Block]

The following table sets forth the maturities of the Company’s debt obligations as of February 28, 2014, for the twelve-month periods ending February 28,

2015	$	4.7
2016	$	—
2017	$	—
2018	$	175.0
Total debt	$	179.7

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- Definition

Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation.

+ References

No definition available.

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- Definition

Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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