Shareholders' Equity Other Comprehensive Income (Loss) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Before-tax amount [Abstract]
Foreign currency translation adjustment	$ 10,685,000	$ 5,352,000	$ (15,908,000)	$ 3,098,000
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	(2,331,000)	651,000	(2,341,000)	822,000
Net hedging (gain) loss reclassified to net income	832,000	(2,610,000)	(291,000)	(2,874,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment and Tax	(457,000)	(378,000)	81,000	720,000
Net defined benefit plan (gain) loss reclassified to net income	469,000	(189,000)	940,000	(10,000)
Total other comprehensive income (loss), before tax	61,286,000	3,582,000	34,569,000	1,756,000
Tax (provision) benefit [Abstract]
Foreign currency translation adjustment	625,000	(165,000)	1,773,000	(297,000)
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	135,000	136,000	427,000	176,000
Net hedging (gain) loss reclassified to net income	(25,000)	189,000	49,000	377,000
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, Tax	6,000	42,000	2,000	(57,000)
Net defined benefit plan (gain) loss reclassified to net income	29,000	36,000	25,000	1,000
Total other comprehensive income (loss) tax benefit	(770,000)	(154,000)	(2,276,000)	(200,000)
Net-of-tax amount [Abstract]
Foreign currency translation adjustment	11,310,000	5,187,000	(14,135,000)	2,801,000
Net unrealized gain (loss) on derivative instruments, designated as cash flow hedges	(2,196,000)	787,000	(1,914,000)	998,000
Net hedging (gain) loss reclassified to net income	807,000	(2,421,000)	(242,000)	(2,497,000)
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	(451,000)	(336,000)	83,000	663,000
Net defined benefit plan (gain) loss reclassified to net income	498,000	(153,000)	965,000	(9,000)
Total other comprehensive income (loss), net of tax	62,056,000	3,736,000	36,845,000	1,956,000
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	62,056,000	3,736,000	36,845,000	1,956,000
Accumulated Other Comprehensive Income (Loss), Net of Tax	(167,827,000)		(167,827,000)		$ (204,672,000)
OCI before reclassifications			(15,966,000)	4,462,000
Foreign currency translation adjustment reclassified to net income on sale of business	52,088,000	0	52,088,000	0
Foreign currency translation adjustment reclassified to net income on sale of business	0	0	0	0
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI before reclassifications			(14,135,000)	2,801,000
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI before reclassifications			(1,914,000)	998,000
Net Unrealized Gain (Loss) on Nonderivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (14,400,000)	$ (14,400,000)	(14,400,000)	(14,400,000)
OCI before reclassifications			0	0
Pension Benefit Obligation Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
OCI before reclassifications			$ 83,000	$ 663,000