Income Taxes (Schedule of Components of Income Tax Expense) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax based on income from continuing operations	$ 16,262	$ 13,821	$ 23,571	$ 24,668
Provision for change in estimated tax rate	(490)	(382)	(490)	(382)
Income tax before discrete items	15,772	13,439	23,081	24,286
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount [Abstract]
Exercise of U.S. stock options	0	(6)	0	(56)
Adjustments to prior period tax liabilities	879	0	767	0
Provision for/resolution of tax audits and contingencies, net	(1,489)	153	(1,733)	347
Out-of-period adjustments to deferred tax assets	0	5	1,830	(2,227)
Changes in opening valuation allowance	(13)	0	3,656	(1,346)
Changes in valuation allowance	222	841	222	841
Other	(7)	(27)	(5)	36
Total income tax expense	$ 15,364	$ 14,405	$ 27,818	$ 21,881

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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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Amount 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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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 revisions of previously reported income tax expense (benefit).

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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 income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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