Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Per Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]
Beginning Balance at Jan. 28, 2012	$ 1,009,228	$ 1,657	$ 302,612	$ 704,631	$ 328
Beginning Balance, Shares at Jan. 28, 2012		165,736
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	180,219			180,219
Unrealized losses on marketable securities, net of taxes	(112)				(112)
Issuance of common stock, Shares		3,649
Issuance of common stock	16,531	37	16,494
Dividends paid on common stock ($0.30, $0.24 and $0.21 per share for the years ending 2014, 2013, and 2012)	(34,928)			(34,928)
Repurchase of common stock, Shares		(6,611)
Repurchase of common stock	(111,521)	(66)	(4,113)	(107,342)
Stock-based compensation	26,453		26,453
Excess tax benefit from stock-based compensation	7,329		7,329
Dividends declared per share	$ 0.21
Ending Balance at Feb. 02, 2013	1,093,199	1,628	348,775	742,580	216
Ending Balance, Shares at Feb. 02, 2013		162,774
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	65,883			65,883
Unrealized losses on marketable securities, net of taxes	(146)				(146)
Issuance of common stock, Shares		3,579
Issuance of common stock	12,395	36	12,359
Dividends paid on common stock ($0.30, $0.24 and $0.21 per share for the years ending 2014, 2013, and 2012)	(38,255)			(38,255)
Repurchase of common stock, Shares		(14,158)
Repurchase of common stock	(251,646)	(142)	(6,677)	(244,827)
Stock-based compensation	27,145		27,145
Excess tax benefit from stock-based compensation	486		486
Foreign currency translation adjustment	42				42
Dividends declared per share	$ 0.24
Ending Balance at Feb. 01, 2014	909,103	1,522	382,088	525,381	112
Ending Balance, Shares at Feb. 01, 2014		152,195
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	64,641			64,641
Unrealized losses on marketable securities, net of taxes	(73)				(73)
Issuance of common stock, Shares		1,805
Issuance of common stock	6,268	18	6,250
Dividends paid on common stock ($0.30, $0.24 and $0.21 per share for the years ending 2014, 2013, and 2012)	(45,773)			(45,773)
Repurchase of common stock, Shares		(1,084)
Repurchase of common stock	(18,124)	(11)	(8,119)	(9,994)
Stock-based compensation	26,487		26,487
Excess tax benefit from stock-based compensation	569		569
Foreign currency translation adjustment	523				523
Dividends declared per share	$ 0.30
Ending Balance at Jan. 31, 2015	$ 943,621	$ 1,529	$ 407,275	$ 534,255	$ 562
Ending Balance, Shares at Jan. 31, 2015		152,916