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Life Insurance Loans - Additional Information (Detail) $ in Thousands	3 Months Ended	6 Months Ended
	Dec. 03, 2017 USD ($)	Dec. 03, 2017 USD ($)
Schedule Of Life Insurance Liabilities [Line Items]
Weighted Average Interest Rate	6.30%	6.30%
Repayment of life insurance loans	$ 1,605	$ 1,605
Life Insurance Loans [Member]
Schedule Of Life Insurance Liabilities [Line Items]
Weighted Average Interest Rate	4.50%	4.50%
Life Insurance Loans [Member] | Minimum [Member]
Schedule Of Life Insurance Liabilities [Line Items]
Interest Rate		4.20%
Life Insurance Loans [Member] | Maximum [Member]
Schedule Of Life Insurance Liabilities [Line Items]
Interest Rate		4.80%

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- Definition

Schedule of life insurance liabilities.

+ References

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- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Weighted average interest rate of debt outstanding.

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585

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