Details of Certain Balance Sheet Accounts (Schedule of Accrued Expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Details Of Certain Balance Sheet Accounts [Abstract]
Current portion of operating lease liabilities	$ 9,774	$ 9,283
Payor advances	6,485	4,206
Accrued health insurance	5,200	5,607
Accrued professional fees	2,978	4,220
Accrued payroll taxes	1,872	4,543
Other	10,768	9,705
Total accrued expenses	$ 37,077	$ 37,564