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Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Tax expense (benefit) at U.S.federal statutory rate $ 23.2 $ 17.1 $ (4.0)
State income tax, net of U.S. federal tax benefit 6.0 2.3 2.4
Change in federal valuation allowance 29.1 20.9 4.1
Net income attributable to non-controlling interests (30.2) (29.9) (24.8)
Stock option compensation (2.5) (1.7) 1.2
Differences related to divested facilities (1.4) (2.6) (0.7)
Tax return reconciling differences (1.0) 1.3 0.0
Change in effective tax rate (0.5) 0.0 (0.8)
Tax Receivable Agreement liability 0.4 0.7 0.9
Goodwill impairment 0.0 0.0 4.3
Litigation settlement 0.0 0.0 (3.7)
Adjustments to unrealized attributes 0.0 2.3 0.0
Other 0.2 0.1 1.0
Total income tax expense (benefit) $ 23.3 $ 10.5 $ (20.1)