Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ (15,094,000)	$ (28,380,000)	$ (5,834,000)	$ (55,917,000)
Foreign currency translation adjustment reclassified to net income (loss) on sale of business	0	1,885,000	0	57,321,000
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)	204,000	(320,000)	492,000
Total other comprehensive income (loss), before tax	(15,201,000)	(26,291,000)	(6,154,000)	6,101,000
Tax (provision) benefit [Abstract]
Foreign currency translation adjustment	85,000	183,000	(10,000)	201,000
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	(6,000)	0	(22,000)
Net defined benefit plan (gain) loss reclassified to net income (loss)	(2,000)	(2,000)	(2,000)	(3,000)
Total other comprehensive income (loss) tax (provision) benefit	83,000	175,000	(12,000)	176,000
Net-of-tax amount [Abstract]
Foreign currency translation adjustment	(15,009,000)	(28,197,000)	(5,844,000)	(55,716,000)
Foreign currency translation adjustment reclassified to net income (loss) on sale of business	0	1,885,000	0	57,321,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0	(6,000)	0	4,183,000
Net defined benefit plan (gain) loss reclassified to net income (loss)	(109,000)	202,000	(322,000)	489,000
Total other comprehensive income (loss), net of tax	$ (15,118,000)	$ (26,116,000)	$ (6,166,000)	$ 6,277,000