Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Leases
Operating lease cost	$ 275	$ 366	$ 642	$ 731
Operating lease payments	269	355	627	708
Operating lease right-of-use assets	4,572	5,554	4,572	5,554	$ 5,026
Operating lease liabilities	$ 4,953	$ 5,901	$ 4,953	$ 5,901
Weighted average remaining lease term	11 years 6 months	11 years	11 years 6 months	11 years
Weighted average discount rate	3.60%	3.60%	3.60%	3.60%
2026 (rest of year)	$ 553		$ 553
2027	703		703
2028	315		315
2029	118		118
2030	123		123
Thereafter	3,141		3,141
Property, plant and equipment, gross	736,718	$ 695,192	$ 736,718	$ 695,192	$ 717,470
Lessor, Operating Lease, Existence of Option to Extend [true false]			true
Lease income	$ 1,831	1,826	$ 3,667	3,613
Maximum
Leases
Remaining lease term	15 years		15 years
Commercial real estate leased to third parties
Leases
Property, plant and equipment, gross	$ 51,228	$ 51,228	$ 51,228	51,228
Depreciation			$ 20,743	$ 19,617
Commercial real estate leased to third parties | Maximum
Leases
Lessor, renewal term	54 years		54 years