SIGNIFICANT ACCOUNTING POLICIES - Reconciliation between Basic and Diluted Net Income per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended										12 Months Ended
	Jan. 31, 2018	[1]	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	[2]	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Accounting Policies [Abstract]
Net income	$ (542)		$ 81,625	$ (8,568)	$ (10,391)	$ (20,104)		$ 70,564	$ (1,293)	$ 2,771	$ 62,124	$ 51,938	$ 114,333
Basic net income per share:
Basic common shares											48,820	46,308	45,328
Basic net income per share	$ (0.01)		$ 1.67	$ (0.18)	$ (0.21)	$ (0.42)		$ 1.54	$ (0.03)	$ 0.06	$ 1.27	$ 1.12	$ 2.52
Diluted net income per share:
Basic common shares											48,820	46,308	45,328
Stock options and restricted stock unit awards											930	1,086	1,184
Diluted common shares											49,750	47,394	46,512
Diluted net income per share	$ (0.01)		$ 1.65	$ (0.18)	$ (0.21)	$ (0.42)		$ 1.5	$ (0.03)	$ 0.06	$ 1.25	$ 1.10	$ 2.46

[1] During the fourth quarter of fiscal 2018, the Company recorded (i) a $6.5 million impairment charge related to leasehold improvements and furniture and fixtures at certain of Wilsons, G.H. Bass and Vilebrequin stores as a result of the performance at these stores, (ii) a $738,000 impairment charge with respect to furniture and fixtures located in certain customers' stores and (iii) a $716,000 write-off of goodwill related to the retail operations segment as a result of the performance of the retail operations segment.

[2] During the fourth quarter of fiscal 2017, the Company recorded a $10.5 million impairment charge related to leasehold improvements and furniture and fixtures at certain of Wilsons, G.H. Bass and Vilebrequin stores as a result of the performance at these stores.