Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Cash flows from operating activities:
Net income (loss)	$ (34,091)	$ 27,686
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	46,734	41,234
Amortization of debt discount and deferred financing costs	2,717	892
Asset impairment	13,766	3,872
Deferred income tax expense (benefit)	(13,686)	8,239
Stock based compensation expense	5,445	4,717
Losses (gains) on change in fair value of derivatives	4,871	0
Inventory adjustments	2,883	2,043
Credit loss expense	432	3,865
Other	1,373	1,592
Changes in operating assets and liabilities:
Accounts receivable	(14,408)	(10,567)
Inventories	6,814	8,319
Other assets	3,444	11,391
Accounts payable	11,630	3,458
Deferred revenue	(6,338)	5,804
Other liabilities	39,834	6,734
Net cash provided by operating activities	71,420	119,279
Cash flows from investing activities:
Purchase of property and equipment	(25,796)	(52,103)
Other	265	315
Net cash used for investing activities	(25,531)	(51,788)
Cash flows from financing activities:
Borrowings on long-term debt, net of discounts	548,769	0
Repayments on long-term debt	(369,269)	(2,500)
Proceeds from exercise of stock options	5,998	2,066
Purchase of treasury stock	(74)	0
Payments of debt issuance costs	(12,400)	0
Payments on finance lease obligations	(1,587)	(1,190)
Net cash provided by (used for) financing activities	171,437	(1,624)
Net change in cash, cash equivalents and restricted cash	217,326	65,867
Cash, cash equivalents and restricted cash, beginning of year	40,307	17,998
Cash, cash equivalents and restricted cash, end of period	257,633	83,865
Supplemental cash flow disclosure information:
Cash paid for interest	13,810	17,438
Capital expenditures accrued at the end of the period	11,265	22,033
Right of use assets acquired under finance leases	1,257	9,763
Right of use assets acquired under operating leases	$ 35,870	$ 58,528