Reconciliation of Total Segment Profit to Operating Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 28, 2015	Mar. 29, 2014
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total Segment Profit	$ 61,563entg_TotalSegmentProfit	$ 34,230entg_TotalSegmentProfit
Amortization	12,307us-gaap_AmortizationOfIntangibleAssets	2,336us-gaap_AmortizationOfIntangibleAssets
Unallocated General And Administrative Expenses	21,717	13,355
Operating income	27,539us-gaap_OperatingIncomeLoss	18,539us-gaap_OperatingIncomeLoss
Interest expense	9,841us-gaap_InterestExpense	29us-gaap_InterestExpense
Interest income	(213)us-gaap_InterestIncomeOther	(223)us-gaap_InterestIncomeOther
Other (income) expense, net	(1,733)us-gaap_OtherNonoperatingIncomeExpense	178us-gaap_OtherNonoperatingIncomeExpense
Income before income tax expense and equity in net loss of affiliates	$ 19,644	$ 18,555

Total segment profit

No definition available.

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General and administrative expenses not allocated to segment profit of company's business segments

+ References

No definition available.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

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-Name Accounting Standards Codification

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Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

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Amount of interest income earned from interest bearing assets not separately disclosed.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

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