Description of Business and Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) financial_institution segment	Dec. 31, 2021 USD ($) financial_institution	Dec. 31, 2020 USD ($)
Schedule of Accounting Policies [Line Items]
Renewal term	1 year
Number of reportable segments | segment	2
Marketable securities	$ 95,200,000	$ 114,396,000
Unrealized gains (losses) from marketable securities	$ (7,500,000)	(1,600,000)	$ 2,600,000
Payment terms	The Company’s payment terms with customers on promissory notes can vary based on several factors and the circumstances of each promissory note, however typically promissory notes mature over a 1 to 4 year period. Similar to accounts receivable, each reporting period the Company evaluates the collectability of outstanding notes receivable balances and records an allowance for doubtful accounts representing an estimate of future expected credit losses.
Amortization period of inventories and supplies	24 months
Depreciation	$ 10,500,000	10,300,000	10,100,000
Advertising expense	0	0	0
Impairment of long-lived assets	0	0	0
Goodwill and intangible asset impairment	$ 0	$ 0	0
Number of financial institutions holding cash and cash equivalents and marketable securities | financial_institution	1	1
Revenues	$ 1,690,176,000	$ 1,641,959,000	$ 1,760,303,000
Genesis
Schedule of Accounting Policies [Line Items]
Accounts receivable	36,200,000
Notes receivable	$ 20,400,000
Significant Customers | Consolidated revenues | Genesis
Schedule of Accounting Policies [Line Items]
Concentration risk, percentage	10.00%	10.80%	14.70%
Revenues	$ 169,100,000	$ 177,100,000	$ 258,700,000
Vendor | Products and other items | Sysco
Schedule of Accounting Policies [Line Items]
Concentration risk, percentage	50.00%
Minimum
Schedule of Accounting Policies [Line Items]
Cancellation notice period	30 days
Initial period preceding cancellation notice	60 days
Minimum | Housekeeping and Dietary equipment
Schedule of Accounting Policies [Line Items]
Property plant and equipment, useful life	3 years
Minimum | Computer hardware and software
Schedule of Accounting Policies [Line Items]
Property plant and equipment, useful life	3 years
Minimum | Vehicles
Schedule of Accounting Policies [Line Items]
Property plant and equipment, useful life	5 years
Maximum
Schedule of Accounting Policies [Line Items]
Cancellation notice period	90 days
Initial period preceding cancellation notice	120 days
Maximum | Housekeeping and Dietary equipment
Schedule of Accounting Policies [Line Items]
Property plant and equipment, useful life	5 years
Maximum | Computer hardware and software
Schedule of Accounting Policies [Line Items]
Property plant and equipment, useful life	5 years
Maximum | Vehicles
Schedule of Accounting Policies [Line Items]
Property plant and equipment, useful life	10 years