Defined Benefit Plans - Net Periodic Pension Costs (Details) - Pension Plans, Defined Benefit [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service costs	$ 160	$ 320	$ 360	$ 650
Interest costs	230	200	460	400
Expected return on plan assets	(420)	(390)	(830)	(780)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0	0	150	0
Amortization of net (gain)/loss	150	230	290	460
Net periodic benefit cost	$ 120	$ 360	$ 430	$ 730