Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Operating activities:
Net income	$ 71,840	$ 57,680	$ 48,024
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	26,631	22,227	17,202
Share-based compensation expense	11,953	11,172	5,931
Deferred income tax benefit	(2,532)	(626)	(3,063)
Other non-cash expenses	109	59	444
Changes in operating assets and liabilities:
Inventories	(6,079)	(32,718)	(26,275)
Prepaid income taxes	(211)	598	(442)
Prepaid expenses and other assets	(14,875)	2,561	(2,936)
Accounts payable	(5,451)	17,578	3,060
Income taxes payable	11,997	(2,500)	8,435
Accrued salaries and wages	3,133	2,386	2,603
Deferred rent	7,855	6,398	5,669
Other accrued expenses	2,252	3,098	2,778
Net cash provided by operating activities	106,622	87,913	61,430
Investing activities:
Payments to Acquire Investments	(119,746)	(46,335)	0
Proceeds from Sale and Maturity of Marketable Securities	77,776	0	0
Capital expenditures	(44,794)	(53,059)	(32,322)
Net cash used in investing activities	(86,764)	(99,394)	(32,322)
Financing activities:
Repayment of note payable under Term Loan Facility	0	0	(19,500)
Borrowing on note payable under Revolving Credit Facility	0	0	7,000
Repayment of note payable under Revolving Credit Facility	0	0	(7,000)
Net proceeds from issuance of common stock	208	178	179
Proceeds from exercise of options to purchase common stock	3,289	912	1,481
Common shares withheld for taxes	(1,904)	(322)	(314)
Excess tax benefit related to exercises of stock options, vesting of restricted stock units, and vesting of performance-based restricted stock units	1,555	608	2,049
Other	1	0	(1)
Net cash provided by (used in) financing activities	3,149	1,376	(16,106)
Net increase (decrease) in cash and cash equivalents	23,007	(10,105)	13,002
Cash and cash equivalents at beginning of year	53,081	63,186	50,184
Cash and cash equivalents at end of year	76,088	53,081	63,186
Supplemental disclosures of cash flow information:
Interest paid	10	25	129
Income taxes paid	31,762	36,897	21,587
Increase (decrease) in accounts payable and accrued purchases of property and equipment	$ 511	$ 1,986	$ 1,673