Significant Accounting Policies - Summary of Impact of Adopting ASUs on the Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands		12 Months Ended
	Feb. 04, 2018	Feb. 02, 2019	Feb. 03, 2018	Feb. 01, 2020	Jan. 28, 2017
Current assets:
Cash and cash equivalents		$ 5,803	$ 17,907	$ 47,658	$ 87,023
Accounts receivable-net		40,224		48,979
Merchandise inventories		531,947		438,696
Asset held for sale		21,795
Prepaid expense and other current assets		104,198		61,619
Total current assets		703,967		596,952
Property and equipment-net		952,957		967,599
Operating lease right-of-use assets		440,504		410,904
Goodwill		124,379		124,367
Tradenames, trademarks and domain names		86,022
Deferred tax assets		35,603		45,005
Other non-current assets		79,586		214,845
Total assets		2,423,018		2,445,694
Current liabilities:
Accounts payable and accrued expenses		320,497		330,309
Deferred revenue and customer deposits		152,595		162,433
Operating lease liabilities		66,249		58,924
Other current liabilities		109,456		140,714
Total current liabilities		992,586		982,912
Asset based credit facility		57,500		53,062
Non-current operating lease liabilities		437,557		409,930
Non-current finance lease liabilities		421,245		442,988
Other non-current obligations		32,512		28,520
Total liabilities		2,461,708		2,427,043
Stockholders' (deficit):
Preferred stock
Common stock		2		2
Additional paid-in capital		356,422		430,662
Accumulated other comprehensive loss		(2,334)		(2,760)
Accumulated deficit		(392,537)		(409,253)
Treasury stock		(243)
Total stockholders' (deficit)		(38,690)	(8,155)	18,651	$ 923,829
Total liabilities and stockholders' (deficit)		2,423,018		2,445,694
Convertible senior notes due 2019
Current liabilities:
Convertible senior notes due-net		343,789
Convertible senior notes due 2020
Current liabilities:
Convertible senior notes due-net				290,532
Convertible senior notes due-net		271,157
Convertible senior notes due 2023
Current liabilities:
Convertible senior notes due-net		249,151		266,658
As Reported
Current assets:
Cash and cash equivalents		5,803
Accounts receivable-net		40,224
Merchandise inventories		531,947
Prepaid expense and other current assets		104,719
Total current assets		682,693
Property and equipment-net		863,562
Goodwill		124,379
Tradenames, trademarks and domain names		86,022
Deferred tax assets		30,033
Other non-current assets		19,345
Total assets		1,806,034
Current liabilities:
Accounts payable and accrued expenses		320,441
Deferred revenue and customer deposits		152,595
Other current liabilities		101,347
Total current liabilities		918,172
Asset based credit facility		57,500
Financing obligations under build-to-suit lease transactions		228,928
Deferred rent and lease incentives		53,742
Other non-current obligations		50,346
Total liabilities		1,828,996
Stockholders' (deficit):
Common stock		2
Additional paid-in capital		356,422
Accumulated other comprehensive loss		(2,333)
Accumulated deficit		(376,810)	152,400
Treasury stock		(243)
Total stockholders' (deficit)		(22,962)
Total liabilities and stockholders' (deficit)		1,806,034
Cumulative Effect On Retained Earnings Net Of Tax1		4,000	4,000
As Reported | Convertible senior notes due 2019
Current liabilities:
Convertible senior notes due-net		343,789
As Reported | Convertible senior notes due 2020
Current liabilities:
Convertible senior notes due-net		271,157
As Reported | Convertible senior notes due 2023
Current liabilities:
Convertible senior notes due-net		249,151
Adjustment
Current assets:
Asset held for sale		21,795
Prepaid expense and other current assets		(521)
Total current assets		21,274
Property and equipment-net		89,395
Operating lease right-of-use assets		440,504
Deferred tax assets		5,570
Other non-current assets		60,241
Total assets		616,984
Current liabilities:
Accounts payable and accrued expenses		56
Operating lease liabilities		66,249
Other current liabilities		8,109
Total current liabilities		74,414
Financing obligations under build-to-suit lease transactions		(228,928)
Deferred rent and lease incentives		(53,742)
Non-current operating lease liabilities		437,557
Non-current finance lease liabilities		421,245
Other non-current obligations		(17,834)
Total liabilities		632,712
Stockholders' (deficit):
Accumulated other comprehensive loss		(1)
Accumulated deficit		(15,727)
Total stockholders' (deficit)		(15,728)
Total liabilities and stockholders' (deficit)		616,984
Accounting Standards Update 2016-02
Stockholders' (deficit):
Cumulative Effect On Retained Earnings Net Of Tax1			$ 4,000
Adjustments | Accounting Standards Update 2014-09
Current assets:
Prepaid expense and other current assets		33,587		30,980
Deferred tax assets		(6,561)		(6,561)
Current liabilities:
Accounts payable and accrued expenses		(686)		(570)
Deferred revenue and customer deposits		9,304		7,894
Other current liabilities		(2,806)		(10,634)
Stockholders' (deficit):
Accumulated deficit		21,214		27,729
Cumulative Effect On Retained Earnings Net Of Tax1	$ 21,000
Balances without Adoption of Topic 606 | Accounting Standards Update 2014-09
Current assets:
Prepaid expense and other current assets		137,785		92,599
Deferred tax assets		29,042		38,444
Current liabilities:
Accounts payable and accrued expenses		319,811		329,739
Deferred revenue and customer deposits		161,899		170,327
Other current liabilities		106,650		130,080
Stockholders' (deficit):
Accumulated deficit		$ (371,323)		$ (381,524)