CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 29, 2022	Jan. 30, 2021	Jan. 25, 2020
Cash flows from operating activities:
Net Income	$ 48,574	$ 34,337	$ 57,215
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	152,652	175,897	187,556
Non-cash lease expense	31,838	31,828	30,043
Non-cash lease expense	8,024	(28,185)	9,261
Stock-based compensation	9,866	12,771	10,034
Provision for bad debt (recovery), net	2,911	406	(6,540)
Gain on sale of fixed assets	(4,203)	(10,026)	(14,879)
Loss (gain) on debt extinguishment	62	(12,046)	76
Amortization of debt discount	1,665	7,441	20,112
Amortization of debt issuance costs and other	2,825	2,797	4,023
Goodwill impairment charge	0	53,264	0
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(40,687)	(41,755)	(195,796)
Contract assets, net	176,982	53,664	(35,888)
Other current assets and inventories	(12,255)	27,316	(6,960)
Other assets	2,220	9,178	41,068
Income taxes receivable/payable	(17,177)	7,505	(84)
Accounts payable	(4,905)	43,747	(2,141)
Accrued liabilities, insurance claims, operating lease liabilities, and other liabilities	(49,737)	13,638	(39,101)
Net cash provided by operating activities	308,655	381,777	57,999
Cash flows from investing activities:
Capital expenditures	(157,042)	(58,047)	(120,574)
Proceeds from sale of assets	5,363	13,419	19,045
Other investing activities	0	0	306
Net cash used in investing activities	(151,679)	(44,628)	(101,223)
Cash flows from financing activities:
Proceeds from 2029 Notes	500,000	0	0
Proceeds from borrowings on senior credit agreement, including term loans	95,000	1,056,000	475,000
Principal payments on senior credit agreement, including term loans	(271,875)	(973,500)	(480,625)
Debt issuance costs	(11,646)	0	0
Repurchase of common stock	(106,133)	(100,000)	0
Extinguishment of 2021 Convertible Notes	(58,264)	(401,736)	(25,000)
Redemption discount on convertible debt, net of costs	0	30,761	675
Settlement of convertible note hedges related to extinguished convertible debt	0	7,197	388
Purchase of warrants	(693)	(7,176)	(301)
Exercise of stock options	2,261	5,738	503
Restricted stock tax withholdings	(6,639)	(728)	(1,698)
Net cash provided by (used in) financing activities	142,011	(383,444)	(31,058)
Net increase (decrease) in cash, cash equivalents and restricted cash	298,987	(46,295)	(74,282)
Cash, cash equivalents and restricted cash at beginning of period (Note 8)	13,574	59,869	134,151
Cash, cash equivalents and restricted cash at end of period (Note 8)	312,561	13,574	59,869
Supplemental disclosure of other cash flow activities and non-cash investing and financing activities:
Cash paid for interest	22,076	20,653	26,655
Cash paid for taxes, net	8,601	45,332	12,017
Purchases of capital assets included in accounts payable or other accrued liabilities at period end	$ 6,666	$ 6,556	$ 8,814