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

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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		3 Months Ended									12 Months Ended
	Jun. 13, 2017	Apr. 30, 2017	Jan. 29, 2017	Oct. 30, 2016	Jul. 31, 2016	May 01, 2016	Jan. 31, 2016	Nov. 01, 2015	Aug. 02, 2015	Aug. 03, 2014	Apr. 30, 2017	May 01, 2016	May 03, 2015
Dividends [Line Items]
Cash dividends paid		$ 988	$ 985	$ 862	$ 3,445	$ 859	$ 864	$ 741	$ 5,676		$ 6,280	$ 8,140	$ 7,579
Cash dividend payment, per share		$ 0.08	$ 0.08	$ 0.07	$ 0.28	$ 0.07	$ 0.07	$ 0.06	$ 0.46
Special Dividend [Member]
Dividends [Line Items]
Cash dividends paid					$ 2,600				$ 5,000	$ 4,900
Cash dividend payment, per share					$ 0.21				$ 0.40	$ 0.40
Quarterly Dividend [Member]
Dividends [Line Items]
Cash dividends paid											$ 3,700	$ 3,100	$ 2,700
Quarterly Dividend [Member] \| Minimum [Member]
Dividends [Line Items]
Cash dividend payment, per share											$ 0.07	$ 0.06	$ 0.05
Quarterly Dividend [Member] \| Maximum [Member]
Dividends [Line Items]
Cash dividend payment, per share											$ 0.08	$ 0.07	$ 0.06
Subsequent Event [Member] \| Special Dividend [Member]
Dividends [Line Items]
Cash dividend declared, per share	$ 0.21
Subsequent Event [Member] \| Quarterly Dividend [Member]
Dividends [Line Items]
Cash dividend declared, per share	$ 0.08
Date of payment to shareholders entitled to dividends	Jul. 17, 2017
Date of record of shareholders entitled to dividends	Jul. 03, 2017