Dividends [Line Items]

No definition available.

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

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- Definition

Date the declared dividend will be paid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

+ Details

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- Definition

Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format.

+ References

No definition available.

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- Definition

Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

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Dividend Program (Detail) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Feb. 28, 2017	Jan. 29, 2017	Jan. 31, 2016
Dividends [Line Items]
Cash dividends paid		$ 5,292	$ 7,281
Special Dividend [Member]
Dividends [Line Items]
Cash dividends paid		$ 2,600	$ 5,000
Cash dividend payment, per share		$ 0.21	$ 0.40
Quarterly Dividend [Member]
Dividends [Line Items]
Cash dividends paid		$ 2,700	$ 2,300
Quarterly Dividend [Member] \| Minimum [Member]
Dividends [Line Items]
Cash dividend payment, per share		$ 0.07	$ 0.06
Quarterly Dividend [Member] \| Maximum [Member]
Dividends [Line Items]
Cash dividend payment, per share		$ 0.08	$ 0.07
Subsequent Event [Member] \| Quarterly Dividend [Member]
Dividends [Line Items]
Cash dividend declared, per share	$ 0.08
Cash dividend declared, payment date	Apr. 17, 2017
Cash dividend declared, date of record	Apr. 03, 2017