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Income Taxes (Schedule Of Differences Between The Income Tax Expense (Benefit)Computed At The Statutory Federal income Tax Rate And As Presented On The Consolidated Statements Of Operations) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Taxes [Abstract]      
Tax expense at federal statutory rate $ (8,883) $ (33,698) $ (36,317)
State income tax expense (benefit), net of federal benefit 516 (802) (7,839)
Nondeductible compensation 1,037 421 762
Noncontrolling interests (4,587) (4,015) (3,961)
Unrecognized tax benefits (170) (28) 36
R&D Credits     (323)
Increase in valuation allowance 15,301 6,279 25,314
Disposition of subsidiary     (373)
Stock compensation (1,954) 721 369
Amended return adjustments   (19,786)  
Other 585 525 1,016
Income tax expense (benefit) $ 1,845 $ (50,383) $ (21,316)