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Fair Value (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Nov. 30, 2012
Summary showing the recurring fair value measurements of the contingent consideration liability
Net sales based payments	$ 60,499
Level 3 [Member] | Contingent Consideration Earn Out Liability [Member] | Recurring [Member]
Summary showing the recurring fair value measurements of the contingent consideration liability
Net sales based payments	$ 60,500
Net sales based payments discount rate	4.00%
Level 3 [Member] | Maximum [Member] | Contingent Consideration Earn Out Liability [Member] | Recurring [Member]
Summary showing the recurring fair value measurements of the contingent consideration liability
Probability of payment	100.00%
Projected fiscal year of payment	2022
Level 3 [Member] | Minimum [Member] | Contingent Consideration Earn Out Liability [Member] | Recurring [Member]
Summary showing the recurring fair value measurements of the contingent consideration liability
Probability of payment	75.00%
Projected fiscal year of payment	2013

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- Definition

Fair value inputs probability of payment.

+ References

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- Definition

Fair value inputs projected fiscal year of payment.

+ References

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- Definition

Fair value measurement with unobservable inputs reconciliation recurring basis liability contingent consideration earn out liability.

+ References

No definition available.

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

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