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Property Acquisitions - Summary of Purchase Price Allocation (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($) Property	Sep. 30, 2023 USD ($) Property
Business Acquisition [Line Items]
Number of properties | Property	52	37
Payments to Acquire Commercial Real Estate	$ 204,488	$ 192,988
Properties Acquired In Separate Transactions [Member]
Business Acquisition [Line Items]
Number of properties | Property	52	37
Payments to Acquire Commercial Real Estate	$ 204,488	$ 192,988
Purchase price allocated to land	50,991	59,313
Purchase price allocated to buildings and improvements	125,381	113,731
Purchase price allocated to in-place leases	22,298	19,715
Purchase price allocated to above market leases	6,324	786
Purchase price allocated to below market leases	$ (506)	$ (557)
Properties Acquired In Separate Transactions [Member] | Express Tunnel Car Washes [Member]
Business Acquisition [Line Items]
Number of properties | Property	29	23
Payments to Acquire Commercial Real Estate	$ 136,070	$ 123,416
Purchase price allocated to land	31,497	34,481
Purchase price allocated to buildings and improvements	89,775	75,759
Purchase price allocated to in-place leases	14,870	13,096
Purchase price allocated to above market leases	434	637
Purchase price allocated to below market leases	$ (506)	$ (557)
Properties Acquired In Separate Transactions [Member] | Convenience Stores [Member]
Business Acquisition [Line Items]
Number of properties | Property	3	10	[1]
Payments to Acquire Commercial Real Estate	$ 18,853	$ 61,392	[1]
Purchase price allocated to land	6,271	21,313	[1]
Purchase price allocated to buildings and improvements	10,964	34,245	[1]
Purchase price allocated to in-place leases	$ 1,618	$ 5,834	[1]
Properties Acquired In Separate Transactions [Member] | Auto Service Centers [Member]
Business Acquisition [Line Items]
Number of properties | Property	17	1
Payments to Acquire Commercial Real Estate	$ 41,370	$ 2,086
Purchase price allocated to land	11,534	894
Purchase price allocated to buildings and improvements	19,104	990
Purchase price allocated to in-place leases	4,842	$ 202
Purchase price allocated to above market leases	$ 5,890
Properties Acquired In Separate Transactions [Member] | Drive-thru QSRs [Member]
Business Acquisition [Line Items]
Number of properties | Property	3	3
Payments to Acquire Commercial Real Estate	$ 8,195	$ 6,094
Purchase price allocated to land	1,689	2,625
Purchase price allocated to buildings and improvements	5,538	2,737
Purchase price allocated to in-place leases	$ 968	583
Purchase price allocated to above market leases		$ 149
[1] Purchase price and land allocation include $0.9 million related to the acquisition of a land parcel adjacent to an existing site which was subsequently combined with the existing site into a single property upon redevelopment of the existing site.In addition, as part of larger sale-leaseback transactions that included certain of the express tunnel car washes referenced above, we acquired 13 properties that were under construction for $40.0 million and committed to provide additional funding to our tenant during the construction period to complete the development of these assets. These 13 properties did not meet the criteria for sale-leaseback accounting and are accounted for as finance receivables. Accordingly, this initial investment and all subsequent fundings made during the construction period are recorded within notes and mortgages receivable on our consolidated balance sheets, and rental payments resulting from these investments are recorded within interest on notes and mortgages receivable on our consolidated statements of operations. At the end of the construction period, we will recognize the purchase of the assets, remove the finance receivables from our consolidated balance sheets, and begin to record rental income from the operating lease. As of September 30, 2023, we had advanced an additional $4.2 million and, in total, had funded $44.2 million related to these 13 properties.

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