Fair Value of Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Financial Assets
Cash, cash equivalents and restricted cash	$ 68.7		$ 90.4	$ 184.7		$ 78.2
Total Notes and Other Receivables, net	733.3		617.3
Financial Liabilities
Secured debt	3,373.0		3,217.8
Total unsecured debt	4,241.0		3,979.4
Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	59.4		65.9
Fair Value, Recurring | Carrying Value
Financial Assets
Cash, cash equivalents and restricted cash	68.7		90.4
Derivative assets	32.6		32.0
Total assets measured at fair value	733.5		620.8
Financial Liabilities
Secured debt	3,373.0		3,217.8
Senior unsecured notes	2,176.2		1,779.6
Line of credit and other unsecured debt	2,064.8		2,199.8
Total unsecured debt	4,241.0		3,979.4
Other financial liabilities (contingent consideration)	20.2		20.2
Total liabilities measured at fair value	7,634.2		7,217.4
Fair Value, Recurring | Carrying Value | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	59.4		65.9
Fair Value, Recurring | Carrying Value | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	462.4		305.2
Fair Value, Recurring | Carrying Value | Marketable securities
Financial Assets
Marketable securities	110.4		127.3
Fair Value, Recurring | Estimate of Fair Value Measurement
Financial Assets
Cash, cash equivalents and restricted cash	68.7		90.4
Derivative assets	32.6		32.0
Total assets measured at fair value	733.5		620.8
Financial Liabilities
Secured debt	2,938.8		2,814.1
Senior unsecured notes	1,879.9		1,432.7
Line of credit and other unsecured debt	2,064.8		2,199.8
Total unsecured debt	3,944.7		3,632.5
Other financial liabilities (contingent consideration)	20.2		20.2
Total liabilities measured at fair value	6,903.7		6,466.8
Fair Value, Recurring | Estimate of Fair Value Measurement | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	59.4		65.9
Fair Value, Recurring | Estimate of Fair Value Measurement | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	462.4		305.2
Fair Value, Recurring | Estimate of Fair Value Measurement | Marketable securities
Financial Assets
Marketable securities	110.4		127.3
Fair Value, Recurring | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)
Financial Assets
Cash, cash equivalents and restricted cash	68.7		90.4
Derivative assets	0.0		0.0
Total assets measured at fair value	179.1		217.7
Financial Liabilities
Secured debt	0.0		0.0
Senior unsecured notes	0.0		0.0
Line of credit and other unsecured debt	0.0		0.0
Total unsecured debt	0.0		0.0
Other financial liabilities (contingent consideration)	0.0		0.0
Total liabilities measured at fair value	0.0		0.0
Fair Value, Recurring | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	0.0		0.0
Fair Value, Recurring | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	0.0		0.0
Fair Value, Recurring | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Marketable securities
Financial Assets
Marketable securities	110.4		127.3
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Financial Assets
Cash, cash equivalents and restricted cash	0.0		0.0
Derivative assets	32.6		32.0
Total assets measured at fair value	32.6		32.0
Financial Liabilities
Secured debt	3,373.0		3,217.8
Senior unsecured notes	2,176.2		1,779.6
Line of credit and other unsecured debt	2,064.8		2,199.8
Total unsecured debt	4,241.0		3,979.4
Other financial liabilities (contingent consideration)	0.0		0.0
Total liabilities measured at fair value	7,614.0		7,197.2
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	0.0		0.0
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	0.0		0.0
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Marketable securities
Financial Assets
Marketable securities	0.0		0.0
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Financial Assets
Cash, cash equivalents and restricted cash	0.0		0.0
Derivative assets	0.0		0.0
Total assets measured at fair value	521.8		371.1
Financial Liabilities
Secured debt	0.0		0.0
Senior unsecured notes	0.0		0.0
Line of credit and other unsecured debt	0.0		0.0
Total unsecured debt	0.0		0.0
Other financial liabilities (contingent consideration)	20.2		20.2
Total liabilities measured at fair value	20.2		20.2
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	59.4		65.9
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	462.4		305.2
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Marketable securities
Financial Assets
Marketable securities	0.0		0.0
Fair Value, Recurring | Marketable securities
Financial Assets
Marketable securities	110.4		127.3			186.9
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net
Financial Assets
Total assets measured at fair value	59.5	$ 62.2	65.9	73.1	$ 77.2	79.1
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes receivable from real estate developers and operators
Financial Assets
Total assets measured at fair value	$ 462.4	$ 435.0	$ 305.2	$ 292.3	$ 304.4	$ 284.0