Comprehensive Income - Reclassification adjustments out of accumulated other comprehensive loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Amortization of defined benefit pension items
Prior service cost	$ 5	$ 5	$ 15	$ 15
Actuarial losses	102	119	290	357
Total before tax	107	124	305	372
Tax benefit	(28)	(32)	(80)	(97)
Net current period other comprehensive (loss) income	$ 79	$ 92	$ 225	$ 275