XML 36 R44.htm IDEA: XBRL DOCUMENT v2.4.0.8

Long-Term Debt - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Oct. 31, 2014	Apr. 30, 2014	Oct. 31, 2014 New Hampshire Bonds [Member]	Oct. 31, 2014 Revenue Bonds Series 2013 Due 2029 [Member]	Apr. 30, 2014 Revenue Bonds Series 2013 Due 2029 [Member]
Debt Instrument [Line Items]
Additional bond issued			$ 5,500
Debt instrument amount outstanding	$ 523,778	$ 508,019	$ 11,000	$ 5,500	$ 5,500

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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The cash inflow from the issuance of long-term tax exempt debt that is not secured by collateral.

+ References

No definition available.

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfUnsecuredTaxExemptDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration