Consolidated Statements Of Contingently Redeemable Common Stock And Stockholders' Deficit - USD ($)	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance (in shares) at Jan. 28, 2017		87,073,000				0
Beginning balance at Jan. 28, 2017	$ (347,211,000)	$ 871,000	$ 6,397,000	$ (356,760,000)	$ 2,281,000	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	50,301,000			50,301,000
Postretirement medical plan adjustment, net of tax	(312,000)				(312,000)
Unrealized loss on cash flow hedge, net of tax	0
Dividends paid	(735,518,000)		(6,397,000)	(729,121,000)
Stock compensation expense	9,102,000		9,102,000
Options exercised	(2,850,000)		(2,850,000)
Call of shares	(554,000)		(554,000)
Other equity transactions	(2,815,000)		(2,815,000)	(432,000)	432,000
Ending balance (in shares) at Feb. 03, 2018		87,073,000				0
Ending balance at Feb. 03, 2018	$ (1,029,857,000)	$ 871,000	2,883,000	(1,036,012,000)	2,401,000	$ 0
Beginning balance (in shares) at Jan. 28, 2017	1,043,000
Beginning balance at Jan. 28, 2017	$ 8,145,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Options exercised (in shares)	616,000
Options exercised	$ 3,708,000
Call of shares (in shares)	(203,000)
Call of shares	$ (1,415,000)
Ending balance (in shares) at Feb. 03, 2018	1,456,000
Ending balance at Feb. 03, 2018	$ 10,438,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	127,261,000			127,261,000
Postretirement medical plan adjustment, net of tax	240,000				240,000
Unrealized loss on cash flow hedge, net of tax	(13,956,000)				(13,956,000)
Dividends paid	(25,000)		(25,000)
Common stock issued for public offering, net of related fees (in shares)		43,125,000
Common stock issued for public offering, net of related fees	685,889,000	$ 431,000	685,458,000
Common stock issued under stock incentive plans (in shares)		4,875,000
Common stock issued under stock incentive plans	0	$ 49,000	(49,000)
Stock reclassification as a result of public offering (in shares)		1,736,000
Stock reclassification as a result of public offering	13,202,000	$ 17,000	13,185,000
Common stock issued related to follow-on offering (in shares)		1,290,000
Common stock issued related to follow-on offering	0	$ 13,000	(13,000)
Common stock repurchased upon vesting of stock awards (in shares)						(781,866)
Common stock repurchased upon vesting of stock awards	(19,109,000)					$ (19,109,000)
Stock compensation expense	57,677,000		57,677,000
Options exercised	(2,210,000)		(2,210,000)
Call of shares	(12,000)		(12,000)
Net shares used to pay tax withholdings upon option exercise	(22,883,000)		(22,883,000)
Net cash received on option exercises	$ 8,061,000		8,061,000
Ending balance (in shares) at Feb. 02, 2019	137,317,000	138,099,000				(782,000)
Ending balance at Feb. 02, 2019	$ (202,084,000)	$ 1,381,000	742,072,000	(915,113,000)	(11,315,000)	$ (19,109,000)
Increase (Decrease) in Temporary Equity [Roll Forward]
Stock reclassification as a result of public offering (in shares)	(1,736,000)
Stock reclassification as a result of public offering	$ (13,202,000)
Options exercised (in shares)	280,000
Options exercised	$ 2,792,000
Call of shares	$ (28,000)
Ending balance (in shares) at Feb. 02, 2019	0
Ending balance at Feb. 02, 2019	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	187,176,000			187,176,000
Postretirement medical plan adjustment, net of tax	(990,000)				(990,000)
Unrealized loss on cash flow hedge, net of tax	(14,281,000)				(14,281,000)
Dividends paid	(25,000)		(25,000)
Common stock issued under stock incentive plans (in shares)		2,536,000
Common stock issued under stock incentive plans	0	$ 25,000	(25,000)
Common stock repurchased upon vesting of stock awards (in shares)						(143,205)
Common stock repurchased upon vesting of stock awards						$ (3,800,000)
Common stock issued under ESPP plan (in shares)		88,000
Common stock issued under ESPP plan	1,729,000	$ 1,000	1,728,000
Stock compensation expense	$ 18,796,000		18,796,000
Treasury Stock purchases (in shares)	0					(2,643,000)
Treasury stock purchases	$ (67,305,000)					$ (67,305,000)
Net cash received on option exercises	$ 11,072,000		11,072,000
Ending balance (in shares) at Feb. 01, 2020	137,298,000	140,723,000				(3,425,000)
Ending balance at Feb. 01, 2020	$ (54,344,000)	$ 1,407,000	$ 773,618,000	$ (716,369,000)	$ (26,586,000)	$ (86,414,000)
Ending balance (in shares) at Feb. 01, 2020	0
Ending balance at Feb. 01, 2020	$ 0