Borrowing Arrangements - Narratives (Details)			1 Months Ended	9 Months Ended	12 Months Ended
	Oct. 03, 2024 USD ($)	Jul. 18, 2024 extension	Oct. 31, 2024 USD ($)	Sep. 30, 2024 USD ($) property	Dec. 31, 2022 USD ($)	Apr. 30, 2024 USD ($)	Dec. 31, 2023 USD ($) property	Apr. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2021 USD ($)
Debt Instrument
Investment in real estate				$ 5,263,611,000			$ 5,257,415,000
Unsecured line of credit				32,500,000			31,000,000
Asset Pledged as Collateral
Debt Instrument
Investment in real estate				3,245,600,000			3,194,100,000
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				$ 32,500,000			$ 31,000,000.0
Line of credit, remaining borrowing amount				$ 467,400,000
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%
Number of pledged properties | property				120			120
Secured Mortgage Notes Payable | Minimum | Secured Debt
Debt Instrument
Stated interest rate (percent)				2.40%
Secured Mortgage Notes Payable | Maximum | Secured Debt
Debt Instrument
Stated interest rate (percent)				5.10%
Senior Unsecured Term Loan | Unsecured Debt
Debt Instrument
Debt face amount				$ 300,000,000	$ 200,000,000	$ 300,000,000.0		$ 200,000,000	$ 300,000,000	$ 300,000,000
Variable rate basis adjustment (percent)				0.10%	0.10%
Senior Unsecured Term Loan | Unsecured Debt | Subsequent Event
Debt Instrument
Stated interest rate (percent)			6.05%
Repayments of debt	$ 300,000,000		$ 300,000,000
Senior Unsecured Term Loan | Minimum | Unsecured Debt
Debt Instrument
Debt instrument, variable rate (percent)				1.40%	1.20%
Senior Unsecured Term Loan | Maximum | Unsecured Debt
Debt Instrument
Debt instrument, variable rate (percent)				1.95%	1.70%