Net Earnings (Loss) Per Share - Additional Information (Detail) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended	9 Months Ended
	Jan. 28, 2017 USD ($) $ / shares shares	Jan. 30, 2016 USD ($) $ / shares shares	Aug. 01, 2015 USD ($)	Jan. 30, 2016 USD ($) shares	Jan. 28, 2017 USD ($) $ / shares shares	Jan. 30, 2016 USD ($) $ / shares shares	Dec. 14, 2015 USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Repurchase Program, Authorized Amount | $							$ 50,000
Stock Repurchased During Period, Shares					688,948
Stock Repurchased During Period, Value | $				$ 8,701	$ 6,718
Treasury Stock Acquired, Average Cost Per Share | $ / shares					$ 10.10
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $	$ 26,669				$ 26,669
Shares Paid for Tax Withholding for Share Based Compensation					117,029
Net Income (Loss) Attributable to Parent | $	3,761	$ (3,603)	$ (26,918)	$ 29,798	$ 5,134	$ 2,880
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic | $	(1)	0			(3)	(9)
Net Income (Loss) Available to Common Stockholders, Basic | $	3,760	(3,603)			5,131	2,871
Undistributed Earnings, Basic | $	1	0			3	9
Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted | $	$ 1	$ 0			$ (3)	$ (9)
Weighted Average Number of Shares Outstanding, Basic	46,276,000	48,088,000			46,265,000	45,907,000
Average dilutive restricted stock units	512,000	0			397,000	247,000
Average dilutive performance shares	52,000	0			33,000	0
Average dilutive restricted shares	4,000	0			21,000	0
Average Dilutive Options	0	0			0	19,000
Weighted Average Number of Shares Outstanding, Diluted	46,844,000	48,088,000			46,716,000	46,173,000
Earnings Per Share, Basic | $ / shares	$ 0.08	$ (0.07)			$ 0.11	$ 0.06
Earnings Per Share, Diluted | $ / shares	$ 0.08	$ (0.07)			$ 0.11	$ 0.06
Spinoff [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stockholders' Equity Note, Stock Split, Conversion Ratio			0.632
Treasury Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock Repurchased During Period, Shares				907,000	689,000
Stock Repurchased During Period, Value | $				$ 8,701	$ 6,718
Shares Paid for Tax Withholding for Share Based Compensation				41,000	117,000