Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations	$ 13,251	$ 16,262	$ 24,583	$ 23,571
Provision for change in estimated tax rate	(218)	(490)	(218)	(490)
Income tax before discrete items	13,033	15,772	24,365	23,081
Discrete tax expense:
Exercise of U.S. stock options	(14)	0	(156)	0
Adjustments to prior period tax liabilities	22	879	(1,421)	767
Revaluation of deferred tax assets due to tax rate change	352	0	352	0
Provision for/resolution of tax audits and contingencies, net	0	(1,489)	278	(1,733)
Write-off of net operating losses related to tax audit	0	0	0	1,830
Tax effect of non-deductible foreign exchange loss on intercompany loan	0	(13)	0	3,656
Creation of valuation allowance	0	222	0	222
Other	53	(7)	68	(5)
Total income tax expense	$ 13,446	$ 15,364	$ 23,486	$ 27,818
Effective income tax rate reconciliation, percent	29.50%	34.00%	29.50%	34.00%

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax effect of non-deductible foreign exchange loss on intercompany loan.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operation, attributable to nondeductible expense for award under share-based payment arrangement. Includes, but is not limited to, expense determined to be nondeductible upon grant or after for award under share-based payment arrangement.

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