CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 01, 2022	Oct. 02, 2021
Cash Flows From Operating Activities:
Net (loss) income	$ (424,255)	$ 9,148
Adjustments to reconcile net (loss) income to net cash from operating activities:
Depreciation and amortization	16,774	15,163
Amortization of deferred debt issuance costs	5,221	7,234
Amortization and impairment of operating lease right of use assets	12,722	11,081
Non-cash share-based compensation	14,108	10,142
Goodwill impairment	470,207
Loss on disposal of licenses, property and equipment	1,985	109
Fair value adjustments on interest rate derivatives	(89,634)	(6,246)
Gain on sale of businesses	(170)
Loss on debt extinguishment		13,702
Deferred income taxes	(293)	839
Changes in operating assets and liabilities, net of impact of acquisitions:
Patient accounts receivable	(921)	(3,376)
Prepaid expenses	6,825	2,715
Other current and long-term assets	(1,878)	39
Accounts payable and other accrued liabilities	(2,395)	(15,851)
Accrued payroll and employee benefits	(4,569)	(3,164)
Insurance reserves	5,884	2,752
Operating lease liabilities	(15,845)	(11,783)
Other current and long-term liabilities	(1,932)	(10,316)
Net cash (used in) provided by operating activities	(8,166)	22,188
Cash Flows From Investing Activities:
Acquisitions of businesses, net of cash acquired	(2,027)	(103,202)
Proceeds from sale of businesses	460
Payment for interest rate cap	(11,725)
Purchases of property and equipment	(8,800)	(10,306)
Net cash used in investing activities	(22,092)	(113,508)
Cash Flows From Financing Activities:
Proceeds from issuance of common stock		477,688
Proceeds from employee stock purchase plan	2,278
Proceeds from securitization obligation	40,000
Repayment of securitization obligation	(20,000)
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	925,261
Principal payments on term loans	(6,600)	(1,271,733)
Principal payments on notes payable	(7,564)	(4,910)
Repayment of government stimulus funds		(29,444)
Principal payments of financing lease obligations	(581)	(503)
Payment of offering costs		(5,473)
Payment of debt issuance costs	(218)	(13,107)
Settlements with derivative counterparties	(3,566)	(2,096)
Net cash provided by financing activities	63,449	75,683
Net increase (decrease) in cash and cash equivalents	33,191	(15,637)
Cash and cash equivalents at beginning of period	30,490	137,345
Cash and cash equivalents at end of period	63,681	121,708
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	69,572	47,156
Acquisition of property and equipment on accrual	502	3,246
Offering costs included in accounts payable and other accrued liabilities		135
Cash paid for income taxes, net of refunds received	$ 1,410	$ 3,915