Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Retained Earnings	Accumulated Other Comprehensive Income
Beginning Balance (in shares) at Jan. 31, 2015		152,916
Beginning Balance at Jan. 31, 2015	$ 943,621	$ 1,529	$ 407,275		$ 534,255	$ 562
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,946				1,946
Unrealized losses on marketable securities, net of taxes	(21)					(21)
Foreign currency translation adjustment	(501)					(501)
Issuance of common stock (in shares)		1,716
Issuance of common stock	10,613	$ 17	10,596
Dividends paid on common stock, $0.33, $0.32, and $0.31, as of 2017, 2016, and 2015, respectively	(43,876)				(43,876)
Repurchase of common stock (in shares)		(19,101)		18,307
Repurchase of common stock	(302,849)	$ (191)	(12,845)	$ (289,813)	0
Stock-based compensation	30,062		30,062
Excess tax benefit from stock-based compensation	793		793
Ending Balance (in shares) at Jan. 30, 2016		135,531		18,307
Ending Balance at Jan. 30, 2016	639,788	$ 1,355	435,881	$ (289,813)	492,325	40
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	91,229				91,229
Unrealized losses on marketable securities, net of taxes	(39)					(39)
Foreign currency translation adjustment	(29)					(29)
Issuance of common stock (in shares)		1,763
Issuance of common stock	4,359	$ 18	4,341
Dividends paid on common stock, $0.33, $0.32, and $0.31, as of 2017, 2016, and 2015, respectively	(42,303)				(42,303)
Repurchase of common stock (in shares)		(8,541)		8,110
Repurchase of common stock	(101,878)	$ (85)	(5,512)	$ (96,281)	0
Stock-based compensation	21,249		21,249
Excess tax benefit from stock-based compensation	(3,203)		(3,203)
Ending Balance (in shares) at Jan. 28, 2017		128,753		26,417
Ending Balance at Jan. 28, 2017	609,173	$ 1,288	452,756	$ (386,094)	541,251	(28)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	101,000				101,000
Unrealized losses on marketable securities, net of taxes	(135)					(135)
Foreign currency translation adjustment	119					119
Issuance of common stock (in shares)		1,931
Issuance of common stock	2,127	$ 19	2,108
Dividends paid on common stock, $0.33, $0.32, and $0.31, as of 2017, 2016, and 2015, respectively	(42,441)				(42,441)
Repurchase of common stock (in shares)		(3,213)		2,697
Repurchase of common stock	(34,138)	$ (32)	(6,735)	$ (27,371)
Stock-based compensation	20,677		20,677
Ending Balance (in shares) at Feb. 03, 2018		127,471		29,114
Ending Balance at Feb. 03, 2018	$ 656,382	$ 1,275	$ 468,806	$ (413,465)	$ 599,810	$ (44)