Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013
Cash flows from operating activities
Net income	$ 63,884	$ 30,585
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	26,071	22,639
Accretion of asset retirement obligation	83	71
Amortization of financing fees and debt issuance costs	785	1,479
Loss on disposal of property and equipment	994	8
(Gain)/Loss on sale of intangible assets		(19)
Equity-based compensation	2,995	2,665
Non-cash loss on extinguishment of debt		7,976
Deferred income taxes	11,025	14,070
Changes in operating assets and liabilities:
Accounts receivable	(1,860)	(792)
Inventories	(16,399)	(10,761)
Prepaid expenses and other current assets	5,524	922
Other assets	(636)	163
Accounts payable	34,012	28,383
Accrued salaries and benefits	859	(2,404)
Other accrued liabilities	594	(4,939)
Other long-term liabilities	9,958	6,503
Net cash provided by operating activities	137,889	96,549
Cash flows from investing activities
Purchases of property and equipment	(57,793)	(51,676)
Proceeds from sale of intangible assets		172
Proceeds from sale of property and equipment	115	2
Net cash used in investing activities	(57,678)	(51,502)
Cash flows from financing activities
Borrowing on term loan, net of financing costs		688,127
Payments on term loan	(3,500)	(405,100)
Payments on senior subordinated notes		(35,000)
Payments on capital lease obligations	(244)	(243)
Payments on financing lease obligations	(1,423)	(1,398)
Payments on deferred financing costs		(1,370)
Payments on prepaid IPO costs		(970)
Cash from landlord related to financing lease obligations	577	881
Payments to stockholders and option holders		(295,921)
Repurchase of shares		(113)
Excess tax benefit for exercise of stock options and antidilution payment to optionholders	26,214	4,402
Proceeds from the exercise of stock options	4,786	75
Net cash provided by (used in) financing activities	26,410	(46,630)
Net increase (decrease) in cash and cash equivalents	106,621	(1,583)
Cash and cash equivalents at beginning of the period	77,652	67,211
Cash and cash equivalents at the end of the period	184,273	65,628
Supplemental disclosure of cash flow information
Cash paid for interest	12,183	24,353
Cash paid for income taxes	531	1,192
Supplemental disclosure of non-cash investing and financing activities
Property and equipment in accounts payable	21,969	15,216
Property acquired through capital and financing lease obligations	$ 5,746	$ 11,069