Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 63,279	$ 105,060
Net change related to derivatives	(582)	800
Net current-period other comprehensive income	(1,294)	3,525
Balance	50,972	93,494
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(697)
Net current-period other comprehensive income	(763)
Balance	(1,460)
Unrealized Gain (Losses) On Available-For-Sale Investments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(18)
Balance	(18)
Accrued Pension Service Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1,822)
Net current-period other comprehensive income	52
Balance	(1,770)
Hedge Accounting Reserve [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	580
Total change in hedge fair value recorded in Other Comprehensive Income	(18)
Amounts reclassified from accumulated other comprehensive income	(564)
Net change related to derivatives	(582)
Net current-period other comprehensive income	(582)
Balance	(2)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1,957)	4,882
Total change in hedge fair value recorded in Other Comprehensive Income	(18)
Amounts reclassified from accumulated other comprehensive income	(564)
Net change related to derivatives	(582)
Net current-period other comprehensive income	(1,293)	3,524
Balance	$ (3,250)	$ 8,406