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Income Taxes, Deferred Tax Asset Valuation Adjustments (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Valuation Allowance [Roll Forward] |  |  |  |  |  |  |
Recognition of valuation allowance on foreign tax credit carryforwards |  |  |  | $ 9,800 |  | $ 27,200 |
Deferred Tax Asset Valuation Allowance [Member] |  |  |  |  |  |  |
Valuation Allowance [Roll Forward] |  |  |  |  |  |  |
Beginning balance |  | $ 77,042 |  | 68,697 |  | 56,906 |
Additions charged to cost and expenses |  | 2,154 | [1] | 10,913 | [2] | 27,902 | [3]
Decreases |  | (12,100) | [4] | (3,343) | [5] | (16,215) | [6]
Adjustments | [7] | 244 |  | 775 |  | 104 |
Ending balance |  | $ 67,340 |  | $ 77,042 |  | $ 68,697 |
[1] | Increase in valuation is due primarily to net operating losses in foreign markets.
[2] | Increase in valuation is due primarily to $9.8 million that was recorded on the foreign tax credit carryforward. The additional amount is due to net operating losses in foreign markets.
[3] | Increase in valuation is due primarily to the $27.2 million that was recorded on the foreign tax credit carryforward. The additional amount is due to net operating losses in foreign markets
[4] | The decrease was due to the utilization of prior year foreign tax credits that had previously had a valuation allowance recorded against the asset.
[5] | The decrease was due primarily to the utilization of foreign tax credits, and expiration of foreign net operating losses.
[6] | The decrease was due primarily to the utilization of foreign tax credits. Decrease is due primarily to the write-off of Brazil deferred tax assets, which had no impact to the income statement, as a valuation allowance had been previously recorded against the asset.
[7] | Represents the net currency effects of translating valuation allowances at current rates of exchange.

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- Definition Amount charged to expense to increase valuation allowance for foreign tax credit carryforwards pursuant to Tax Cuts and Jobs Act of 2017 for which accounting for tax effect is incomplete. + References No definition available. + Details
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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of decrease in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column D)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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