Income Taxes - Significant Components of Federal and State Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for doubtful accounts	$ 16,124,000	$ 16,672,000
Deferred compensation	9,587,000	8,239,000
Deferred payroll taxes under the CARES Act	6,220,000	11,914,000
Accrued insurance claims	6,252,000	5,189,000
Non-deductible reserves	521,000	309,000
Leases	247,000	181,000
Other	1,854,000	1,466,000
Deferred tax assets	40,805,000	43,970,000
Deferred tax liabilities:
Expensing of housekeeping supplies	(3,085,000)	(3,322,000)
Amortization of intangibles	(2,118,000)	(574,000)
Depreciation of property and equipment	(1,915,000)	(1,725,000)
Other	(2,152,000)	(2,795,000)
Deferred tax liabilities	(9,270,000)	(8,416,000)
Net deferred tax assets	31,535,000	35,554,000
Business Acquisition [Line Items]
Amortization of goodwill (less than)	2,118,000	$ 574,000
Manufacturer of prepackaged meals
Deferred tax liabilities:
Amortization of intangibles	(100,000)
Business Acquisition [Line Items]
Amortization of goodwill (less than)	100,000
Tax deductible goodwill	$ 0