Real Estate Acquisitions - Narrative (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023 USD ($) property	Jun. 30, 2023 USD ($) property	Mar. 31, 2023 USD ($) property	Sep. 30, 2023 USD ($) property
Real Estate [Line Items]
Total purchase price	$ 24,822	$ 16,019	$ 17,576	$ 58,417
Number of properties (in properties) | property	70	39	39	148
Acquisition closing costs	$ 700	$ 200	$ 300
Class A common stock
Real Estate [Line Items]
Number of acquired postal properties (in properties) | property	70	39	39	70
Total purchase price	$ 24,800	$ 16,000	$ 17,600
Acquisition closing costs	$ 2,800	$ 500