Income Taxes (Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Income Tax Expense Benefit Continuing Operations Income Tax Reconciliation [Abstract]
Deferred Tax Assets, Accounts receivable allowances	$ 14,590	$ 14,023
Deferred Tax Assets, Operating lease liabilities	11,623	12,123
Deferred Tax Assets, Accrued compensation	3,752	3,580
Deferred Tax Assets, Accrued workers' compensation	3,119	3,220
Deferred Tax Assets, Transactions Costs	1,803	1,677
Deferred Tax Assets, Stock-based compensation	1,293	833
Deferred Tax Assets, Government stimulus advances	1,138	1,933
Deferred Tax Assets, Restructuring costs	119	108
Deferred Tax Assets, Other	793	1,269
Total long-term deferred tax assets	38,230	38,766
Deferred Tax Liabilities, Goodwill and intangible assets	(26,097)	(18,891)
Deferred Tax Liabilities, Operating lease assets, net	(9,571)	(10,052)
Deferred Tax Liabilities, Property and equipment	(3,415)	(3,217)
Deferred Tax Liabilities, Insurance premiums	(876)
Deferred Tax Liabilities, Other		(82)
Total long-term deferred tax liabilities	(39,959)	(32,242)
Total net deferred tax assets		$ 6,524
Total net deferred tax liabilities	$ (1,729)