Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance at Jan. 28, 2017	$ 61	$ (86)	$ 565,861	$ 85,425	$ 651,261
Beginning balance (in shares) at Jan. 28, 2017	60,756	(9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 0	$ 0	1,911	0	1,911
Proceeds from stock options exercised	$ 0	$ 0	2,555	0	2,555
Proceeds from stock options exercised (in shares)	355	0
Vesting of restricted stock	$ 0	$ 0	0	0	0
Vesting of restricted stock (in shares)	26	0
Common shares withheld for taxes	$ 0	$ 0	(219)	0	(219)
Common shares withheld for taxes (in shares)	(7)	0
Net income	$ 0	$ 0	0	18,966	18,966
Ending balance at Apr. 29, 2017	$ 61	$ (86)	570,108	104,391	674,474
Ending balance (in shares) at Apr. 29, 2017	61,130	(9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adopting ASU 2014-09 (Note 2) | ASU 2014-09 [Member]	$ 0	$ 0	0	(5,591)	(5,591)
Beginning balance at Feb. 03, 2018	$ 62	$ (86)	583,467	213,019	796,462
Beginning balance (in shares) at Feb. 03, 2018	62,007	(9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 0	$ 0	1,600	0	1,600
Proceeds from stock options exercised	$ 0	$ 0	3,492	0	3,492
Proceeds from stock options exercised (in shares)	312	0
Vesting of restricted stock	$ 0	$ 0	0	0	0
Vesting of restricted stock (in shares)	51	0
Common shares withheld for taxes	$ 0	$ 0	(702)	0	(702)
Common shares withheld for taxes (in shares)	(12)	0
Net income	$ 0	$ 0	0	30,454	30,454
Ending balance at May. 05, 2018	$ 62	$ (86)	$ 587,857	$ 237,882	$ 825,715
Ending balance (in shares) at May. 05, 2018	62,358	(9)