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Income Taxes Significant Differences Between U.S. Federal Statutory Rate and Effective Income Tax Rate (Detail) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |
Federal statutory rate | 21.00% | 21.00% | 21.00%
State taxes, net of federal tax benefit | 0.30% | (0.50%) | 0.90%
Change in valuation allowance | 1.90% | 1.90% | 0.70%
Impact of foreign earnings, net | (8.40%) | (3.70%) | (0.30%)
Global intangible low tax inclusion | 1.90% | 1.80% | 0.80%
Change in U.S. federal statutory rate | 0.00% | 0.00% | 0.10%
Transition tax on deferred foreign earnings | 0 | 0 | (0.053)
Subpart F income | 1.30% | 0.60% | 0.90%
Stock-based compensation | (1.00%) | (0.60%) | (0.70%)
Depletion | (0.90%) | (0.70%) | (0.60%)
Revaluation of unrecognized tax benefits/reserve requirements | (0.40%) | (2.70%) | 0.00%
Other items, net | (1.10%) | (1.40%) | 0.70%
Effective income tax rate | 14.60% | 15.70% | 18.20%

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage 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 changes in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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