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Income Taxes - Reconciliation of Effective Tax Rate to U.S. Federal Statutory Rate (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
U.S. Federal statutory rate	21.00%	21.00%	21.00%
State income taxes, net of federal income tax benefit	2.30%	1.80%	1.20%
Foreign operations, net	(1.40%)	(0.90%)	(0.10%)
U.S. Benefits for Manufacturing, Export and credits	(1.90%)	(2.00%)	(1.80%)
Uncertain Tax Items	(1.30%)	(1.00%)	1.70%
Stock compensation	(1.00%)	(1.50%)	(0.50%)
Net deferred tax revaluation	0.00%	0.00%	(0.10%)
US Tax on Foreign Earnings	2.10%	2.30%	(0.10%)
Other	(0.40%)	(0.20%)	(0.10%)
Consolidated effective tax rate	19.40%	19.50%	21.20%

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- Definition

Represents the reconciliation to income tax percentage on behalf of tax credits from manufacturing and exports.

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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 foreign tax credit.

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Represents the reconciliation to income tax rate on behalf of uncertain tax items.

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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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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-Name Accounting Standards Codification
-Topic 740
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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.

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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 applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of difference between reported income tax expense (benefit) and 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 share-based payment arrangement.

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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 other adjustments.

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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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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