Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 2,180	$ 5,401	$ 91,103
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	70,135	56,995	44,595
Goodwill impairment	33,700
Assets impairments and lease losses	6,481	17,137
Product recalls	7,707	4,615
Net non-cash charges resulting from inventory step-up	2,527	6,835
Amortization of purchase premiums and accretion of purchases discount—net	99	1,022	1,166
Amortization of debt discount	30,457	28,822	22,114
Excess tax (benefit) shortfall from exercise of stock options		3,288	(10,443)
Stock-based compensation expense	50,709	29,214	24,223
Non-cash loss on extinguishment of debt	1,880
Deferred income taxes	6,572	(221)	(6,011)
Other non-cash interest expense	5,325	3,121	2,473
Change in assets and liabilities—net of acquisition:
Accounts receivable	2,758	588	(2,629)
Merchandise inventories	220,767	(4,304)	(166,505)
Prepaid expense and other assets	45,537	(36,889)	10,817
Accounts payable and accrued expenses	64,460	(50,307)	29,196
Deferred revenue and customer deposits	3,366	23,977	33,213
Other current liabilities	680	(23,820)	39,580
Deferred rent and lease incentives	1,059	4,662	13,597
Other non-current obligations	(1,297)	8,709	215
Net cash provided by operating activities	555,102	78,845	126,704
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(112,455)	(157,644)	(119,461)
Acquisition of buildings and land			(13,999)
Construction related deposits	(14,387)	(23,380)	(20,049)
Purchase of trademarks and domain names	(39)	(322)	(339)
Proceeds from sale of assets held for sale—net	15,123
Purchase of investments	(16,109)	(248,485)	(217,379)
Maturities of investments	46,890	187,338	143,830
Sales of investments	145,020	37,096
Acquisition of business—net of cash acquired		(116,100)
Net cash provided by (used in) investing activities	64,043	(321,497)	(227,397)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowing under promissory and equipment security notes	34,000
Repayments under promissory and equipment security notes	(2,319)
Proceeds from issuance of convertible senior notes			296,250
Proceeds from issuance of warrants			30,390
Purchase of convertible note hedges			(68,250)
Debt issuance costs	(8,298)		(2,382)
Repurchases of common stock—including commissions	(1,000,326)
Payments on build-to-suit lease transactions	(10,200)
Proceeds from exercise of stock options	24,896	3,261	25,606
Excess tax benefit (shortfall) from exercise of stock options		(3,288)	10,443
Tax withholdings related to issuance of stock-based awards	(5,759)	(1,603)	(5,027)
Other financing activities	(377)	(611)	(248)
Net cash provided by (used in) financing activities	(688,413)	(2,241)	286,782
Effects of foreign currency exchange rate translation	152	449	(308)
Net increase (decrease) in cash and cash equivalents	(69,116)	(244,444)	185,781
Cash and cash equivalents
Beginning of period	87,023	331,467	145,686
End of period	17,907	87,023	331,467
Cash paid for interest	28,180	16,615	13,369
Cash paid for taxes	4,025	48,464	29,135
Non-cash transactions:
Property and equipment additions due to build-to-suit lease transactions	35,386	55,991	96,323
Property and equipment reduction due to effected sale leaseback			(74,855)
Property and equipment additions from use of construction related deposits	35,024	10,720	13,915
Property and equipment additions in accounts payable and accrued expenses at period-end	25,182	9,201	12,108
Property and equipment acquired under capital lease	847	$ 16	88
Issuance of non-current notes payable related to share repurchases from former employees			238
Asset Based Credit Facility [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowing	600,000
Repayments	(400,030)
Term Loan [Member]
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowing	180,000
Repayments	$ (100,000)
Trademarks and Domain Names [Member]
Non-cash transactions:
Property and equipment additions in accounts payable and accrued expenses at period-end			$ 107