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Income Taxes - Schedule of Income Tax Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Computed federal income tax expense	$ 1.2	$ (8.2)	$ (11.1)
State income taxes	(1.1)	(5.1)	(15.6)
Valuation allowance	3.4	8.3	84.4
REIT rate differential	(4.7)	(7.9)	(51.5)
Amended return	0.0	(1.1)	0.6
Noncontrolling interest	0.1	0.5	(0.6)
Impairment	0.0	12.4	10.7
Other, net	0.7	(0.9)	(0.6)
Income tax expense (benefit)	$ (0.4)	$ (2.0)	$ 16.3

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Effective Income Tax Rate Reconciliation, REIT Rate Differential

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible impairment loss.

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