Effective tax rate benefit over tax holiday benefit.

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Income to fully utilize credit carryforwards

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Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible state and local operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible foreign tax credit carryforwards.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances.

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity.

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Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries.

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The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction.

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Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions.

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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 foreign tax credit.

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Expiration date of each operating loss carryforward included in operating loss carryforward, in CCYY-MM-DD format.

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The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Expiration date of the tax credit carryforward, in CCYY-MM-DD format.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2012
Income Tax [Line Items]
Deferred Tax Liabilities, Net	$ (36,720,000)us-gaap_DeferredTaxLiabilities
Net deferred tax assets		(18,810,000)us-gaap_DeferredTaxAssetsLiabilitiesNet
Deferred Tax Assets, Valuation Allowance	11,104,000	5,435,000
Undistributed foreign earnings	618,000,000
Withholding taxes to be incurred on distribution of retained earnings	12,000,000
Unrecognized tax benefits that would impact effective tax rate	4,300,000
Accrued interest and penalties related to unrecognized tax benefits	500,000	800,000
Interest and penalties recognized in the statement of operations	(400,000)	(100,000)	0
Gross unrecognized tax benefit decrease within next twelve months	200,000
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	2,600,000
Income to utilize credit carryforward	31,000,000entg_Incometoutilizecreditcarryforward
State
Income Tax [Line Items]
State operating loss carryforwards	42,400,000
Operating loss carryforwards, expiration date	Dec. 31, 2015
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	Dec. 31, 2010
Foreign
Income Tax [Line Items]
Deferred Tax Liabilities, Net	(1,400,000)
Net deferred tax assets		8,200,000
Deferred Tax Assets, Valuation Allowance	500,000
Operating loss carryforwards, expiration date	Dec. 31, 2023
Foreign tax credit carryforwards	7,200,000
Tax credit carryforwards, expiration date	Dec. 31, 2019
Foreign operating loss carryforwards	2,700,000
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	Dec. 31, 2008
U.S.
Income Tax [Line Items]
Deferred Tax Liabilities, Net	(24,800,000)
Net deferred tax assets		16,000,000
Deferred Tax Assets, Valuation Allowance	10,600,000	5,400,000
Year Which Prior Year's Tax Returns Are No Longer Subject to Tax Examination	Dec. 31, 2010
Malaysia
Income Tax [Line Items]
Income tax expense benefit per diluted share	$ 0.06	$ 0.04		$ 0.02
additional effective tax rate benefit	3,300,000
Income tax benefit estimate attributable to the tax status of subsidiary	8,000,000	5,400,000		2,400,000
Korea Tax Authority [Member]
Income Tax [Line Items]
Income tax expense benefit per diluted share	$ 0.0
additional effective tax rate benefit	200,000
Income tax benefit estimate attributable to the tax status of subsidiary	200,000
Inland Revenue, Singapore (IRAS) [Member]
Income Tax [Line Items]
Income tax expense benefit per diluted share	$ 0.00	$ 0.01		$ 0.00
additional effective tax rate benefit	3,700,000
Income tax benefit estimate attributable to the tax status of subsidiary	500,000	1,200,000		0
Research Tax Credit Carryforward [Member]
Income Tax [Line Items]
Tax Credit Carryforward, Amount	$ 3,600,000
Research Tax Credit Carryforward [Member] \| U.S.
Income Tax [Line Items]
Tax credit carryforwards, expiration date	Dec. 31, 2033