Leases - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Apr. 12, 2024 property	Mar. 31, 2024 lease	Mar. 31, 2024 property	Mar. 31, 2024 USD ($)	Mar. 31, 2024	Dec. 31, 2023 USD ($) property	Aug. 31, 2023 property
Operating Leased Assets [Line Items]
Number of postal properties subject to direct financing leases (in properties)				2	2			2
Number of operating leases (in properties) | property					75
Number of leases acquired with purchase price greater than value of underlying asset (in properties) | property					70
Aggregate carrying value						$ 52,400
Aggregate purchase price						68,000
Number of operating leases not acquired (in properties) | property					5
Purchase price for postal properties						4,300
ROU asset – operating leases						970		$ 967
Lease liability – operating leases						$ 997
Weighted average remaining lease term	22 years
Operating lease expense	$ 70	$ 60
Number Of Properties Terminated | property									1
Subsequent event
Operating Leased Assets [Line Items]
Number of Properties Sold | property			1
Minimum
Operating Leased Assets [Line Items]
Weighted average discount rate							4.25%
Maximum
Operating Leased Assets [Line Items]
Remaining lease term	58 years 9 months 18 days
Weighted average discount rate							7.35%