Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Leases
Operating lease cost	$ 362	$ 372	$ 1,086	$ 971
Operating lease payments	349	354	939	918
Operating lease right-of-use assets	6,313	5,991	6,313	5,991	$ 7,145
Operating lease liabilities	$ 6,622	$ 6,075	$ 6,622	$ 6,075
Weighted average remaining lease term	11 years	12 years 10 months 24 days	11 years	12 years 10 months 24 days
Weighted average discount rate	3.60%	3.40%	3.60%	3.40%
2024 (rest of year)	$ 291		$ 291
2025	1,148		1,148
2026	777		777
2027	709		709
2028	316		316
Thereafter	3,381		$ 3,381
Lessor, Operating Lease, Existence of Option to Extend [true false]			true
Property, plant and equipment, gross	680,747	$ 660,217	$ 680,747	$ 660,217	$ 670,498
Lease income	$ 1,843	1,341	$ 5,268	3,784
Maximum
Leases
Remaining lease term	17 years		17 years
Commercial real estate leased to third parties
Leases
Property, plant and equipment, gross	$ 51,370	$ 51,370	$ 51,370	51,370
Depreciation			$ 18,756	$ 17,697
Commercial real estate leased to third parties | Maximum
Leases
Lessor, renewal term	56 years		56 years
Industrial building in Canada leased to new tenant
Leases
Amended lease term	15 years		15 years
Industrial building in Canada leased to new tenant | Maximum
Leases
Lessor, renewal term	10 years		10 years