CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022
Cash Flows From Operating Activities:
Net loss	$ (662,034)	$ (117,044)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation and amortization	21,313	20,550
Amortization of deferred debt issuance costs	7,780	8,698
Amortization and impairment of operating lease right of use assets	17,503	14,839
Non-cash share-based compensation	15,893	14,425
Goodwill impairment	675,346	117,702
Loss on disposal or impairment of licenses, property and equipment, and software	3,502	110
Fair value adjustments on interest rate derivatives	(85,367)	(14,317)
Loss on debt extinguishment		13,702
Deferred income taxes	(115)	1,313
Changes in operating assets and liabilities, net of impact of acquisitions:
Patient accounts receivable	(3,227)	(8,808)
Prepaid expenses	9,365	6,829
Other current and long-term assets	(1,708)	(4,475)
Accounts payable and other accrued liabilities	(3,925)	(11,698)
Accrued payroll and employee benefits	(10,729)	(14,026)
Insurance reserves	18,154	2,112
Operating lease liabilities	(19,621)	(15,687)
Deferred payroll taxes	(25,523)	(25,876)
Other current and long-term liabilities	(5,009)	(8,649)
Net cash used in operating activities	(48,402)	(11,350)
Cash Flows From Investing Activities:
Acquisitions of businesses, net of cash acquired	(2,013)	(666,915)
Proceeds from sale of businesses	460
Payment for interest rate cap	(11,725)	(853)
Proceeds from sale of interest rate cap		1,887
Purchases of property and equipment, and software	(12,013)	(15,950)
Net cash used in investing activities	(25,291)	(681,831)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock		477,688
Proceeds from exercise of options		970
Proceeds from employee stock purchase plan	4,015	2,323
Proceeds from securitization obligation	40,000	150,000
Repayment of securitization obligation	(20,000)	(30,000)
Proceeds from revolving credit facility	15,000
Repayments on revolving credit facility	(15,000)
Proceeds from issuance of term loans, net of debt issuance costs	59,700	1,324,531
Principal payments on term loans	(8,900)	(1,273,883)
Principal payments on notes payable	(9,852)	(8,262)
Proceeds from government stimulus funds		2,455
Repayment of government stimulus funds		(31,899)
Principal payments of financing lease obligations	(799)	(795)
Payment of offering costs		(5,473)
Payment of debt issuance costs	(218)	(15,231)
Settlements with derivative counterparties	(1,526)	(4,192)
Payment of acquisition-related contingent consideration		(1,906)
Net cash provided by financing activities	62,420	586,326
Net decrease in cash and cash equivalents	(11,273)	(106,855)
Cash and cash equivalents at beginning of period	30,490	137,345
Cash and cash equivalents at end of period	19,217	30,490
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	102,532	58,959
Cash paid for income taxes, net of refunds received	$ 1,586	$ 5,279