Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ 2,033,000	$ (20,687,000)	$ 9,260,000	$ (27,537,000)
Foreign currency translation adjustment reclassified to net income (loss) on sale of business	0	0	0	55,436,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	0	0	0	4,205,000
Net defined benefit plan (gain) loss reclassified to net income (loss)	(107,000)	214,000	(213,000)	288,000
Total other comprehensive income (loss), before tax	1,926,000	(20,473,000)	9,047,000	32,392,000
Tax (provision) benefit [Abstract]
Foreign currency translation adjustment	(93,000)	59,000	(95,000)	18,000
Foreign currency translation adjustment reclassified to net income (loss) on sale of business	0	0	0	0
Net unrealized gain (loss) on defined benefit plans	0	(7,000)	0	(16,000)
Net defined benefit plan (gain) loss reclassified to net income (loss)	0	(1,000)	0	(1,000)
Total other comprehensive income (loss) tax (provision) benefit	(93,000)	51,000	(95,000)	1,000
Net-of-tax amount [Abstract]
Foreign currency translation adjustment	1,940,000	(20,628,000)	9,165,000	(27,519,000)
Foreign currency translation adjustment reclassified to net income (loss) on sale of business	0	0	0	(55,436,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0	(7,000)	0	4,189,000
Net defined benefit plan (gain) loss reclassified to net income (loss)	(107,000)	213,000	(213,000)	287,000
Total other comprehensive income (loss), net of tax	$ 1,833,000	$ (20,422,000)	$ 8,952,000	$ 32,393,000