Borrowing Arrangements - Narratives (Details)			1 Months Ended		3 Months Ended		9 Months Ended
	Oct. 03, 2024 USD ($)	Jul. 18, 2024 extension	Jul. 31, 2025 USD ($)	May 31, 2025 USD ($)	Sep. 30, 2025 USD ($) property	Jun. 30, 2025 USD ($) community loan	Sep. 30, 2025 USD ($) property	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) property	Apr. 30, 2024 USD ($)	Apr. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2021 USD ($)
Debt Instrument
Investment in real estate					$ 5,321,136,000		$ 5,321,136,000		$ 5,276,152,000
Principal payments and mortgage debt repayment							135,513,000	$ 48,055,000
Line of credit proceeds							662,500,000	$ 383,500,000
Unsecured line of credit					45,000,000		45,000,000		77,000,000
Asset Pledged as Collateral
Debt Instrument
Investment in real estate					3,242,400,000		$ 3,242,400,000		3,268,500,000
Line of Credit | Revolving Credit Facility
Debt Instrument
Line of credit facility, maximum borrowing capacity						$ 500,000,000
Option to increase borrowing capacity						$ 200,000,000
Variable rate basis adjustment (percent)							0.10%
Number of extension periods (extension) | extension		2
Extension period (months)		6 months
Unsecured line of credit					45,000,000.0		$ 45,000,000.0		$ 77,000,000.0
Line of credit, remaining borrowing amount					$ 454,900,000		$ 454,900,000
Minimum | Line of Credit | Revolving Credit Facility
Debt Instrument
Debt instrument, variable rate (percent)							1.25%
Annual facility fee (percent)							0.20%
Maximum | Line of Credit | Revolving Credit Facility
Debt Instrument
Debt instrument, variable rate (percent)							1.65%
Annual facility fee (percent)							0.35%
Secured Mortgage Notes Payable
Debt Instrument
Weighted average interest rate (percent)					3.90%		3.90%
Number of pledged properties | property					112		112		120
Secured Mortgage Notes Payable | Secured Debt
Debt Instrument
Weighted average interest rate (percent)						3.45%
Principal payments and mortgage debt repayment						$ 86,900,000
Number of loans | loan						8
Secured Mortgage Notes Payable | Secured Debt | R V Resort
Debt Instrument
Number of pledged properties | community						4
Secured Mortgage Notes Payable | Secured Debt | M H Resorts
Debt Instrument
Number of pledged properties | community						4
Secured Mortgage Notes Payable | Minimum | Secured Debt
Debt Instrument
Stated interest rate (percent)					2.40%		2.40%
Secured Mortgage Notes Payable | Maximum | Secured Debt
Debt Instrument
Stated interest rate (percent)					5.10%		5.10%
Unsecured Term Loan | Unsecured Debt
Debt Instrument
Debt face amount						$ 240,000,000
Line of credit proceeds			$ 90,000,000	$ 150,000,000
Unsecured Term Loan | Minimum | Unsecured Debt
Debt Instrument
Debt instrument, variable rate (percent)						1.20%
Unsecured Term Loan | Maximum | Unsecured Debt
Debt Instrument
Debt instrument, variable rate (percent)						1.70%
Senior Unsecured Term Loan | Line of Credit
Debt Instrument
Debt face amount					$ 200,000,000		$ 200,000,000
Variable rate basis adjustment (percent)					0.10%
Senior Unsecured Term Loan | Unsecured Debt
Debt Instrument
Debt face amount				$ 240,000,000		$ 300,000,000				$ 300,000,000	$ 200,000,000	$ 300,000,000	$ 300,000,000
Repayments of debt	$ 300,000,000
Senior Unsecured Term Loan | Minimum | Line of Credit
Debt Instrument
Debt instrument, variable rate (percent)					1.20%
Senior Unsecured Term Loan | Maximum | Line of Credit
Debt Instrument
Debt instrument, variable rate (percent)					1.70%