Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2018	Apr. 02, 2017
Cash flows from operating activities
Net income	$ 66,624	$ 46,287
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	26,810	22,622
Accretion of asset retirement obligation and closed store reserve	79	19
Amortization of financing fees and debt issuance costs	376	116
Loss on disposal of property and equipment	79	45
Equity-based compensation	3,968	2,446
Deferred income taxes	10,629	8,878
Changes in operating assets and liabilities:
Accounts receivable	(1,957)	213
Inventories	(10,069)	196
Prepaid expenses and other current assets	(2,135)	(1,350)
Other assets	(1,070)	(27)
Accounts payable and other accrued liabilities	18,637	31,547
Accrued salaries and benefits	(11,995)	(1,642)
Other long-term liabilities	4,511	5,187
Cash flows from operating activities	104,487	114,537
Cash flows from investing activities
Purchases of property and equipment	(44,158)	(57,205)
Proceeds from sale of property and equipment		30
Cash flows used in investing activities	(44,158)	(57,175)
Cash flows from financing activities
Proceeds from revolving credit facilities	40,000	60,000
Payments on revolving credit facilities	(20,000)	(30,000)
Payments on capital and financing lease obligations	(1,039)	(1,093)
Payments of deferred financing costs	(2,131)
Cash from landlords related to financing lease obligations	900	300
Repurchase of common stock	(83,000)	(80,000)
Proceeds from exercise of stock options	6,877	2,292
Other	(59)
Cash flows used in financing activities	(58,452)	(48,501)
Increase in cash and cash equivalents	1,877	8,861
Cash and cash equivalents at beginning of the period	19,479	12,465
Cash and cash equivalents at the end of the period	21,356	21,326
Supplemental disclosure of cash flow information
Cash paid for interest	6,080	4,435
Cash refunded for income taxes		(48)
Supplemental disclosure of non-cash investing and financing activities
Property and equipment in accounts payable	25,068	36,038
Property acquired through capital and financing lease obligations	$ 5,019	$ 3,167