CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jul. 25, 2020	Jul. 31, 2021	Jul. 25, 2020
Cash flows from operating activities:
Net income	$ 37,024	$ 19,063	$ 4,606
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44,129	77,542	90,001
Non-cash lease expense		15,986	15,743
Deferred income tax provision (benefit)		6,412	(15,893)
Stock-based compensation		6,049	6,694
Amortization of debt discount		1,329	6,089
Provision for bad debt, net	119	2,901	236
Gain on sale of fixed assets	(3,418)	(3,844)	(5,206)
Loss (gain) on debt extinguishment	458	62	(12,046)
Amortization of debt issuance costs and other		1,392	1,630
Goodwill impairment charge		0	53,264
Change in operating assets and liabilities:
Accounts receivable, net		(73,898)	(81,295)
Contract assets, net		32,803	(2,392)
Other current assets and inventories		(13,064)	2,417
Other assets		2,235	3,718
Income taxes receivable/payable		(14,193)	15,064
Accounts payable		8,737	64,547
Accrued liabilities, insurance claims, operating lease liabilities, and other liabilities		(10,706)	20,305
Net cash provided by operating activities		58,806	167,482
Cash flows from investing activities:
Capital expenditures		(68,352)	(26,724)
Proceeds from sale of assets		4,235	5,958
Net cash used in investing activities		(64,117)	(20,766)
Cash flows from financing activities:
Proceeds from Issuance of Senior Long-term Debt		500,000	0
Proceeds from borrowings on senior credit agreement, including term loan		95,000	683,000
Principal payments on senior credit agreement, including term loan		(271,875)	(494,250)
Debt issuance costs		(11,638)	0
Repurchase of common stock		(50,000)	0
Extinguishment of 2021 Convertible Notes	(401,736)	0
Redemption discount on convertible debt, net of costs	30,761	0
Settlement of convertible note hedges related to extinguished convertible debt	7,197	0
Purchase of warrants	(7,176)	0
Exercise of stock options		366	3,608
Restricted stock tax withholdings		(6,365)	(329)
Net cash provided by (used in) financing activities		255,488	(178,925)
Net increase (decrease) in cash, cash equivalents and restricted cash		250,177	(32,209)
Cash, cash equivalents and restricted cash at beginning of period (Note 7)		13,574	59,869
Cash, cash equivalents and restricted cash at end of period (Note 7)	$ 27,660	263,751	27,660
Supplemental disclosure of other cash flow activities and non-cash investing and financing activities:
Cash paid for interest		4,997	13,846
Cash paid for taxes, net		12,294	17,150
Purchases of capital assets included in accounts payable or other accrued liabilities at period end		$ 9,736	$ 1,296