Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019
Cash flows from operating activities:
Net income	$ 1,198	$ 28,879
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	68,970	63,570
Amortization of debt discount and deferred financing costs	7,248	1,071
Asset impairment	20,916	7,387
Deferred income tax expense (benefit)	(6,735)	651
Stock based compensation expense	8,335	10,840
Losses (gains) on change in fair value of derivatives	4,596	0
Inventory adjustments	3,502	3,065
Credit loss expense	482	6,265
Loss on extinguishment of debt	0	9,786
Other	1,665	1,963
Changes in operating assets and liabilities:
Accounts receivable	(5,685)	(6,023)
Inventories	12,354	1,063
Other assets	2,538	11,373
Accounts payable	27,847	1,694
Deferred revenue	219	7,068
Other liabilities	56,266	22,286
Net cash provided by operating activities	203,716	170,938
Cash flows from investing activities:
Purchase of property and equipment	(40,837)	(76,472)
Other	323	564
Net cash used for investing activities	(40,514)	(75,908)
Cash flows from financing activities:
Borrowings on long-term debt, net of discounts	548,769	566,550
Repayments on long-term debt	(369,269)	(564,300)
Proceeds from exercise of stock options	10,478	9,992
Purchase of treasury stock	(93)	(25,000)
Payments of debt issuance costs	(12,462)	(2,930)
Payments on finance lease obligations	(2,517)	(2,054)
Net cash provided by (used for) financing activities	174,906	(17,742)
Net change in cash, cash equivalents and restricted cash	338,108	77,288
Cash, cash equivalents and restricted cash, beginning of year	40,307	17,998
Cash, cash equivalents and restricted cash, end of period	378,415	95,286
Supplemental cash flow disclosure information:
Cash paid for interest	19,508	25,182
Capital expenditures accrued at the end of the period	13,516	13,808
Right of use assets acquired under finance leases	1,257	9,551
Right of use assets acquired under operating leases	$ 45,154	$ 84,643