Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 4,882
Total change in hedge fair value recorded in Other Comprehensive Income	731
Amounts reclassified from accumulated other comprehensive income	69
Net change related to derivatives	800	$ 61
Net current-period other comprehensive income (loss)	3,524
Balance	8,406
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	6,842
Net current-period other comprehensive income (loss)	2,677
Balance	9,519
Unrealized Gain (Losses) On Available-For-Sale Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(14)
Net current-period other comprehensive income (loss)	(5)
Balance	(19)
Accrued Pension Service Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1,969)
Net current-period other comprehensive income (loss)	52
Balance	(1,917)
Hedge Accounting Reserve [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	23
Total change in hedge fair value recorded in Other Comprehensive Income	731
Amounts reclassified from accumulated other comprehensive income	69
Net change related to derivatives	800
Net current-period other comprehensive income (loss)	800
Balance	$ 823