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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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