Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ (7,827,000)	$ 15,521,000	$ (16,941,000)	$ (387,000)
Foreign currency translation adjustment reclassified to net income (loss) on sale of business	0	(14,000)	0	52,074,000
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	478,000	(2,887,000)	1,103,000	(5,228,000)
Net hedging (gain) loss reclassified to net income (loss)	32,000	2,879,000	1,200,000	2,588,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	0	(893,000)	0	(812,000)
Net defined benefit plan (gain) loss reclassified to net income (loss)	698,000	499,000	2,121,000	1,439,000
Total other comprehensive income (loss), before tax	(6,619,000)	15,105,000	(12,517,000)	49,674,000
Tax (provision) benefit [Abstract]
Foreign currency translation adjustment	63,000	(1,533,000)	(177,000)	240,000
Foreign currency translation adjustment reclassified to net income (loss) on sale of business	0	0	0	0
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	0	74,000	(18,000)	501,000
Net hedging (gain) loss reclassified to net income (loss)	0	(67,000)	(467,000)	(18,000)
Net unrealized gain (loss) on defined benefit plans	0	(341,000)	0	(339,000)
Net defined benefit plan (gain) loss reclassified to net income (loss)	(11,000)	576,000	(34,000)	601,000
Total other comprehensive income (loss) tax (provision) benefit	52,000	(1,291,000)	(696,000)	985,000
Net-of-tax amount [Abstract]
Foreign currency translation adjustment	(7,764,000)	13,988,000	(17,118,000)	(147,000)
Foreign currency translation adjustment reclassified to net income (loss) on sale of business	0	(14,000)	0	52,074,000
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	478,000	(2,813,000)	1,085,000	(4,727,000)
Net hedging (gain) loss reclassified to net income (loss)	32,000	2,812,000	733,000	2,570,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	0	(1,234,000)	0	(1,151,000)
Net defined benefit plan (gain) loss reclassified to net income (loss)	687,000	1,075,000	2,087,000	2,040,000
Total other comprehensive income (loss), net of tax	$ (6,567,000)	$ 13,814,000	$ (13,213,000)	$ 50,659,000