We lease most of our operating properties to customers under agreements that are typically classified as operating leases (as noted below, two of our leases are accounted for as financing arrangements effective on December 31, 2021). We recognize the total minimum lease payments provided for under the operating leases on a straight-line basis over the lease term. Generally, under the terms of our leases, the majority of our rental expenses, including common area maintenance, real estate taxes and insurance are recovered from our customers. We record amounts reimbursed by customers in the period that the applicable expenses are incurred, which is generally ratably throughout the term of the lease. We have elected the package of practical expedients that allows lessors to not separate lease and non-lease components by class of underlying asset. This practical expedient allowed us to not separate expenses reimbursed by our customers (“tenant reimbursements”) from the associated rental revenue if certain criteria were met. We assessed these criteria and concluded that the timing and pattern of transfer for rental revenue and the associated tenant reimbursements are the same, and for the leases that qualify as operating leases, we accounted for and presented rental revenue and tenant reimbursements as a single component under Lease revenue in our consolidated statements of income for the three months ended March 31, 2024 and 2023.

On December 31, 2021, as a result of the asset purchase and sale transaction with UHS, as amended during the first quarter of 2022, the real estate assets of two wholly-owned subsidiaries of UHS were transferred to us (Aiken and Canyon Creek). As discussed in Note 2, these assets are accounted for as financing arrangements and our consolidated balance sheets at March 31, 2024 and December 31, 2023 reflect financing receivables related to this transaction amounting to $83.2 million and $83.3 million, respectively. Pursuant to the leases, as amended during the first quarter of 2022, the aggregate annual rental during 2024 on the acquired properties, which is payable to us on a monthly basis, amounts to approximately $5.9 million ($4.1 million related to Aiken and $1.8 million related to Canyon Creek). The portion of these lease payments that will be included in our consolidated statements of income, and reflected as interest income on financing leases, is expected to be approximately $5.4 million during the full year of 2024. Lease revenue will not be impacted by the lease payments received related to these two properties.

The components of the “Lease revenue – UHS facilities” and “Lease revenue – Non-related parties” captions for the three month periods ended March 31, 2024 and 2023 are disaggregated below (in thousands). Base rents are primarily stated rent amounts provided for under the leases that are recognized on a straight-line basis over the term of the lease. Bonus rents and tenant reimbursements represent amounts where tenants are contractually obligated to pay an amount that is variable in nature.


	Three Months Ended
	March 31,
	2024		2023
UHS facilities:
Base rents	$	6,972	$	6,274
Bonus rents (a.)		783		764
Tenant reimbursements		909		749
Lease revenue - UHS facilities	$	8,664	$	7,787



Non-related parties:
Base rents		11,172		10,234
Tenant reimbursements		3,315		3,127
Lease revenue - Non-related parties	$	14,487	$	13,361

Demolition of the former specialty hospital located in Chicago, Illinois, was completed during 2023. The aggregate demolition expenses amounted to approximately $1.5 million, (approximately $1.1 million of which were incurred during the first and second quarters of 2023 and $332,000 of which were incurred during the fourth quarter of 2022). The operating expenses incurred by us in connection with this property were $95,000 during the first quarter of 2024 and $417,000 during the first quarter of 2023 (or $152,000 excluding the $265,000 of demolition costs incurred during the first quarter of 2023). The lease on this facility expired on December 31, 2021.

The lease on the specialty facility, located in Evansville, Indiana, expired during 2019 and the facility has been vacant since that time. The operating expenses incurred by us in connection with this facility were approximately $83,000 and $103,000 during the three months ended March 31, 2024 and 2023, respectively.

We continue to market the two above-mentioned properties to third parties. Future operating expenses related to these properties will be incurred by us during the time they remain owned and unleased.

We are the lessee with various third parties, including subsidiaries of UHS, in connection with ground leases for land at fifteen of our consolidated properties. Our right-of-use land assets represent our right to use the land for the lease term and our lease liabilities represent our obligation to make lease payments arising from the leases. Right-of-use assets and lease liabilities were recognized upon adoption of Topic 842 based on the present value of lease payments over the lease term. We utilized our estimated incremental borrowing rate, which was derived from information available as of January 1, 2019, or the commencement date of the ground lease, whichever is later, in determining the present value of lease payments for active leases on that date. A right-of-use asset and lease liability are not recognized for leases with an initial term of 12 months or less, as these short-term leases are accounted for similarly to previous guidance for operating leases. We do not currently have any ground leases with an initial term of 12 months or less. As of March 31, 2024, our condensed consolidated balance sheet includes right-of-use land assets of approximately $10.9 million and ground lease liabilities of approximately $10.9 million. During the first quarter of 2023, the ground lease for the newly constructed and substantially completed Sierra Medical Plaza I commenced and a right-of-use asset and lease liability was recorded in connection with this lease.