Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Aug. 22, 2023	Dec. 31, 2022
Leases
Operating lease cost	$ 372	$ 231	$ 971	$ 783
Operating lease payments	354	275	918	813
Operating lease right-of-use assets	5,991	4,746	5,991	4,746		$ 4,703
Operating lease liabilities	$ 6,075	$ 4,769	$ 6,075	$ 4,769
Weighted average remaining lease term	12 years 10 months 24 days	16 years 1 month 6 days	12 years 10 months 24 days	16 years 1 month 6 days
Weighted average discount rate	3.40%	3.30%	3.40%	3.30%
2023 (rest of year)	$ 242		$ 242
2024	821		821
2025	702		702
2026	428		428
2027	320		320
Thereafter	3,562		$ 3,562
Lessor, Operating Lease, Existence of Option to Extend [true false]			true
Property, plant and equipment, gross	660,217	$ 635,446	$ 660,217	$ 635,446		$ 641,182
Lease income	$ 1,341	1,233	$ 3,784	3,691
Amended lease term					4 years 6 months
Maximum
Leases
Remaining lease term	18 years		18 years
Commercial real estate leased to third parties
Leases
Property, plant and equipment, gross	$ 51,370	$ 51,370	$ 51,370	51,370
Depreciation			$ 17,697	$ 16,638
Commercial real estate leased to third parties | Maximum
Leases
Lessor, renewal term	57 years		57 years