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Long-Term Debt and Capital Leases - Schedule of Future Maturities of Debt (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Maturities of Long-term Debt and Capital Lease Obligations [Abstract]
2015	$ 885
2016	135,324
2017	227
2018	215
2019	323,740
Thereafter	47,628
Total	$ 508,019	$ 496,205

X

- Definition

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.13,16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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X

- Definition

Amount of long-term debt and capital lease obligation maturing after the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

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- Definition

Amount of long-term debt and capital lease obligation maturing in the fifth fiscal year following the latest fiscal year.

+ References

No definition available.

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- Definition

Amount of long-term debt and capital lease obligation maturing in the fourth fiscal year following the latest fiscal year.

+ References

No definition available.

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- Definition

Amount of long-term debt and capital lease obligation maturing in the third fiscal year following the latest fiscal year.

+ References

No definition available.

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- Definition

Amount of long-term debt and capital lease obligation maturing in the second fiscal year following the latest fiscal year.

+ References

No definition available.

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- Definition

Amount of long-term debt and capital lease obligation maturing in the next fiscal year following the latest fiscal year.

+ References

No definition available.

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