Defined Benefit Plans - Net Periodic Pension Costs (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs	$ 120	$ 170	$ 360	$ 530
Interest costs	320	230	950	690
Expected return on plan assets	(530)	(430)	(1,580)	(1,260)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0	0	1,020	150
Amortization of net (gain)/loss	20	140	90	430
Net periodic benefit cost (income)	$ (70)	$ 110	$ 840	$ 540