| Significant Accounting Policies (Policies) | 12 Months Ended |
| Jan. 03, 2014 |
| Organization Basis of Presentation[Abstract] | ' |
| Cash Equivalents | ' |
| Cash Equivalents—Cash equivalents consist of highly liquid investments with original maturities of three months or less at the time of purchase. Investments with original maturities over three months are classified as short-term investments. |
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| Short-Term Investments | ' |
| Short-term Investments—Our short-term investments are considered available-for-sale. We record the unrealized gains and losses, net of tax, in shareholders’ equity as a component of accumulated other comprehensive income (“OCI”). We determine the cost of securities sold based on the specific identification method. Realized gains or losses are recorded in loss on sale of investments and impairment losses that are determined to be other-than-temporary are recorded in other-than-temporary impairment losses in our consolidated statement of operations. |
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| Non-Marketable Equity Securities | ' |
| Non-Marketable Equity Securities—Non-marketable equity securities are accounted for at historical cost or, if we have significant influence over the investee, using the equity method of accounting. These investments are evaluated for impairment quarterly. Such analysis requires significant judgment to identify events or circumstances that would likely have a significant other than temporary adverse effect on the carrying value of the investment. |
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| Deferred Compensation Plan Assets | ' |
| Deferred Compensation Plan Assets—We have made available a non-qualified deferred compensation plan for certain eligible employees. Participants can direct the investment of their deferred compensation plan accounts from a portfolio of funds from which earnings are measured. Although participants direct the investment of these funds, they are classified as trading securities and are included in other non-current assets because they remain our assets until they are actually paid out to the participants. We maintain a portfolio of $11.6 million in mutual fund investments and corporate-owned life insurance under the plan. Changes in the fair value of the asset are recorded as a gain (loss) on deferred compensation investments and changes in the fair value of the liability are recorded as a component of compensation expense. In general, the compensation expense (benefit) is substantially offset by the gains and losses on the investment. During fiscal 2013, 2012 and 2011, we recorded gains (losses) on deferred compensation investments of $1.5 million, $0.9 million, and ($0.5) million, respectively and compensation expense (benefit) of $1.7 million, $1.1 million, and ($0.1) million, respectively. |
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| Fair Value Measurements | ' |
| Fair Value Measurements—In order to determine the fair value of our assets and liabilities, we utilize three levels of inputs, focusing on the most observable inputs when available. Observable inputs are generally developed based on market data obtained from independent sources, whereas unobservable inputs reflect our assumptions about what market participants would use to value the asset or liability, based on the best information available in the circumstances. The three levels of inputs are as follows: |
| Level 1—Quoted prices in active markets which are unadjusted and accessible as of the measurement date for identical, unrestricted assets or liabilities; |
| Level 2—Quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly; |
| Level 3—Prices or valuations that require inputs that are unobservable and significant to the overall fair value measurement. |
| If we use more than one level of input that significantly affects fair value, we include the fair value under the lowest input level used. |
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| Derivatives | ' |
| Derivatives— We record the fair value of our derivative financial instruments in the consolidated financial statements in other current assets or other accrued expenses, regardless of the purpose or intent for holding the derivative contract. We account for these instruments based on whether they meet the criteria for designation as hedging transactions, either as cash flow or fair value hedges. A hedge of the exposure to variability in the cash flows of an asset or a liability, or of a forecasted transaction, is referred to as a cash flow hedge. A hedge of the exposure to changes in fair value of an asset or a liability, or of an unrecognized firm commitment, is referred to as a fair value hedge. The criteria for designating a derivative as a hedge include the instrument’s effectiveness in risk reduction and, in most cases, a one-to-one matching of the derivative instrument to its underlying transaction. |
| Changes in the fair value of derivative instruments designated as a cash flow hedge are recorded in OCI to the extent the derivative instrument is effective. Changes in the fair values of derivatives not designated for hedge accounting and any ineffectiveness measured in designated hedge transactions are reported in earnings as they occur. Gains and losses on derivatives not designated as hedges are recognized currently in earnings and generally offset changes in the values of related assets, liabilities or debt. Hedges on forecasted foreign cash flow commitments do not qualify for deferral, as the hedges are not related to a specific, identifiable transaction. Therefore, gains and losses on changes in the fair market value of the foreign exchange contracts are recognized currently in cost of revenue. |
| The changes in the fair value of our interest rate swaps are recorded in OCI to the extent that the swap is effective. Any ineffectiveness will be recorded in income. We currently have no outstanding swap contracts in place. |
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| Trade Receivables | ' |
| Trade Receivables—The allowance for doubtful accounts reflects our best estimate of probable losses inherent in the accounts receivable balance. We determine the allowance based on the aging of our accounts receivable, historical experience, known troubled accounts, management judgment and other currently available evidence. Collection problems are identified using an aging of receivables analysis based on invoice due dates and other information. When items are deemed uncollectible, we charge them against the allowance for collection losses. We provide for estimated losses from collection problems in the current period, as a component of sales. We utilize credit limits, ongoing evaluation and trade receivable monitoring procedures to reduce the risk of credit loss. Credit is extended based on an evaluation of the customer’s financial condition and collateral is generally not required. Accounts receivable are also recorded net of sales returns and distributor allowances. These amounts are recorded when it is both probable and estimable that discounts will be granted or products will be returned. Aggregate accounts receivable allowances at January 3, 2014 and December 28, 2012 were $14.3 million and $14.9 million, respectively. Please see “Revenue Recognition” for further details. |
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| Inventories | ' |
| Inventories—Inventories are carried at the lower of standard cost (which approximates actual cost, determined by the first-in-first-out method) or market. The total carrying value of our inventories is reduced for any difference between cost and estimated market value of inventories that is determined to be obsolete or unmarketable, based upon assumptions about future demand and market conditions. Inventory adjustments establish a new cost basis and are considered permanent even if circumstances later suggest that increased carrying amounts are recoverable. If demand is higher than expected, we may sell inventory that had previously been reserved |
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| Property, Plant and Equipment | ' |
| Property, Plant and Equipment—Buildings, machinery and equipment are carried at cost, less accumulated depreciation and impairment charges, if any. We expense repairs and maintenance costs that do not extend an asset’s useful life or increase an asset’s capacity. Depreciation is computed using the straight-line method over the estimated useful life of the asset. The estimated useful lives of buildings, which include leasehold improvements, range between 10 and 30 years, or over the lease period, whichever is shorter. The estimated useful lives of machinery and equipment range between three and eight years. We lease certain facilities under operating leases and record the effective rental expense in the appropriate period on the straight-line method. |
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| Asset Impairment | ' |
| Asset Impairment—We recognize impairment losses on long-lived assets when indicators of impairment exist and our estimate of undiscounted cash flows generated by those assets is less than the assets’ carrying amounts. The impairment loss is measured by comparing the fair value of the asset to its carrying amount. Fair value is estimated based on discounted future cash flows or market value, if available. Assets that qualify as held for sale are stated at the lower of the assets’ carrying amount or fair value and depreciation is no longer recognized. |
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| Goodwill | ' |
| Goodwill— Goodwill is an indefinite-lived intangible asset that is not amortized, but instead is tested for impairment annually or more frequently if indicators of impairment exist. We perform a goodwill impairment analysis using the two-step method on an annual basis and whenever events or changes in circumstances indicate that the carrying value may not be recoverable. The recoverability of goodwill is measured at the reporting unit level by comparing the reporting unit’s carrying amount, including goodwill, to the fair market value of the reporting unit |
| The first step of the goodwill impairment test (“Step One”) is to identify potential impairment. This involves comparing the fair value of each reporting unit with its carrying amount, including goodwill. If the fair value of a reporting unit exceeds the carrying amount, the goodwill of the reporting unit is considered not impaired and the second step of the impairment test is unnecessary. If the carrying amount of a reporting unit exceeds its fair value, the second step of the impairment test (“Step Two”) is performed to measure the amount of impairment loss, if any. |
| Step Two involves comparison of the implied fair value of the reporting unit goodwill with the carrying amount of that goodwill. If the carrying amount of the reporting unit’s goodwill exceeds the implied fair value of that goodwill, an impairment loss would be recognized in an amount equal to that excess. The loss recognized cannot exceed the carrying amount of the goodwill. Once a goodwill impairment loss is recognized, the adjusted carrying amount becomes the new accounting basis. |
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| Purchased Intangibles | ' |
| Purchased Intangibles—Purchased intangibles are definite-lived intangible assets which are amortized on a straight-line basis over their estimated useful lives. Purchased intangibles include intangible assets subject to amortization, which are our developed technologies, backlog, customer relationships and intellectual property. We review long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. We measure recoverability of long-lived assets by comparing the carrying amount of the asset group to the future undiscounted net cash flows expected to be generated by those assets. If such assets are considered to be impaired, we recognize an impairment charge for the amount by which the carrying amounts of the assets exceeds the fair value of the assets. |
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| Income Taxes | ' |
| Income Taxes—We follow the liability method of accounting for income taxes. Current income taxes payable and receivable and deferred income taxes resulting from temporary differences between the financial statements and the tax basis of assets and liabilities are separately classified on the consolidated balance sheets. |
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| Uncertain tax positions and unrecognized tax benefits | ' |
| Uncertain tax positions and unrecognized tax benefits (“UTBs”)—We record our tax expense based on various probabilities of sustaining certain tax positions, using a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. We record our UTBs as a component of non-current income taxes payable, unless resolution is expected within one year. |
| Applicable guidance requires us to record our tax expense based on various estimates of probabilities of sustaining certain tax positions. As a result of this and other factors, our estimate of tax expense could change. |
| We classify accrued interest and penalties on income tax matters in the liabilities section of the balance sheet as income taxes payable. When the interest and penalty portions of such uncertain tax positions are adjusted, it is classified as income tax expense. All of the uncertain tax positions and UTBs as of January 3, 2014 would impact our effective tax rate should they be recognized. |
| In the ordinary course of business, the ultimate tax outcome of many transactions and calculations is uncertain, as the calculation of tax liabilities involves the application of complex tax laws in the United States, Malaysia and other jurisdictions. We recognize liabilities for additional taxes that may be due on tax audit issues based on an estimate of the ultimate resolution of those issues. Although we believe the estimates are reasonable, the final outcome may be different than amounts we estimate. Such determinations could have a material impact on the income tax expense (benefit), effective tax rate and operating results in the period they occur. In addition, the effective tax rate reflected in our forward-looking statements is based on current enacted tax laws in the jurisdictions in which we do business. Significant changes in enacted tax law could materially impact our estimates. |
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| Restructuring | ' |
| Restructuring— We record restructuring charges when severance obligations are probable, reasonably estimable and the vested right attributable to the employees’ service is already rendered. We recognize a liability for costs associated with exit or disposal activities when a liability is incurred rather than when an exit or disposal plan is approved. We continually evaluate the adequacy of the remaining liabilities under our restructuring initiatives. Although we believe that these estimates accurately reflect the costs of our restructuring plans, actual results may differ, thereby requiring us to record additional provisions or reverse a portion of such provisions. |
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| Revenue Recognition | ' |
| Revenue Recognition—Revenue is generally recognized when a product is shipped, provided that persuasive evidence of a sales arrangement exists, the price is fixed or determinable, title and risk has transferred, collection of resulting receivables is reasonably assured, there are no customer acceptance requirements and there are no remaining significant obligations. Customers typically provide a customer request date (“CRD”) which indicates the preferred date for receipt of the ordered products. Based on estimated transit time and other logistics, we may deliver products to the carrier in advance of the CRD and recognize revenue from the sale of such products at the time of shipment. Generally, we defer revenue recognition when the shipment occurs more than 10 days in advance of the CRD. |
| Shipments to distributors are made under agreements which provide for certain pricing adjustments (referred to as “ship and debit”) and limited product return privileges, under a stock rotation provision. The distributor may also receive additional price protection on a percentage of unsold inventories they hold. Accordingly, we make estimates of price adjustments based upon inventory reported by distributors as of the balance sheet date and record this as a distributor allowance. We rely on historical distributor allowances to estimate these adjustments. Distributors may also receive allowances for certain parts returned under a stock rotation provision of the distributor agreement. We estimate the stock rotation provision based on the percentage of sales made to distributors and historical returns. |
| For certain distributors, we defer recognition until the distributors resell the products to their end customer (“sell-through distributor”). Revenue at published list price and cost of revenue to sell-through distributors are deferred until either the product is resold by the distributor or, in certain cases, return privileges terminate, at which time revenue and cost of revenue are recorded in the statement of operations. The final price is also subject to ship and debit credits, reducing the final amount recorded in revenue at resale. |
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| The following table summarizes the deferred income balance, primarily consisting of sell-through distributors (in thousands): |
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| | As of January 3, 2014 | | As of December 28, 2012 | | |
| Deferred revenue at published list price | | $ 15,075 | | $ 12,272 | | |
| Deferred cost of revenue | | $ (3,139) | | $ (2,700) | | |
| Deferred income | | $ 11,936 | | $ 9,572 | | |
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| The following table summarizes the relationship between shipments, allowances and reported revenue (in thousands): |
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| | Year ended |
| | 3-Jan-14 | | 28-Dec-12 | | 30-Dec-11 |
| Gross revenue | | $ 662,227 | | $ 701,895 | | $ 829,762 |
| Allowances and deferrals | | $ (87,032) | | $ (94,031) | | $ (69,272) |
| Revenue | | $ 575,195 | | $ 607,864 | | $ 760,490 |
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| In fiscal years 2012 and 2011, we entered into price protection agreements with additional international distributors to solidify our relationships and stabilize prices across geographic regions, which resulted in increased allowances and deferrals from 2011 levels due primarily to increased ship and debit and stock rotation returns. |
| Distributors provide us periodic data regarding the product, price, quantity, and end customer when products are resold as well as the quantities of our products they still have in stock. We must use estimates and apply judgment to reconcile distributors' reported inventories to their activities. Any error in our judgment could lead to inaccurate reporting of our revenue, cost of revenue, trade receivable, deferred income, and net income (loss). |
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| Warranty | ' |
| Warranty—We provide for the estimated cost of product warranties at the time revenue is recognized. While we engage in extensive product quality programs and processes, including actively monitoring and evaluating the quality of our suppliers, the estimated warranty obligation is affected by ongoing product failure rates and material usage costs incurred in correcting a product failure. Actual product failure rates or material usage costs that differ from estimates result in revisions to the estimated warranty liability. We warrant for a limited period of time that our products will be free from defects in material workmanship and possess the electrical characteristics to which we have committed. We estimate warranty allowances based on historical warranty experience. Historically, warranty expenses were not material to our consolidated financial statements. |
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| Research and Development | ' |
| Research and Development—Research and development costs consist of the cost of designing, developing and testing new or significantly enhanced products and are expensed as incurred. |
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| Advertising Expense | ' |
| Advertising Expense—Advertising costs are expensed in the period incurred. Advertising expense was $3.4 million, $6.3 million and $6.7 million in 2013, 2012 and 2011, respectively. |
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| Equity-based Compensation | ' |
| Equity-based Compensation—Our equity based compensation plans allow several forms of equity compensation including stock options (“Options”), restricted and deferred stock awards (“Awards”) and employee stock purchase plans (“ESPPs”). The 2008 Equity Compensation Plan (“2008 Plan”) includes several available forms of stock compensation of which only Options and Awards have been granted to date. Awards issued consist of deferred stock units and restricted stock units, which may differ in regard to the timing of the related prospective taxable event to the recipient. |
| We also have the 2000 ESPP whereby eligible employees can purchase shares of Intersil common stock through payroll deductions at a price not less than 85% of the market value of the stock on specified dates, with no lookback provision. |
| Stock-based compensation cost is measured at the grant date, based on the fair value of the awards ultimately expected to vest, and is recognized as an expense, on a straight-line basis, over the requisite service period. We use a binomial lattice model to measure the fair value of Options and a Monte-Carlo simulation to estimate the fair value of Options and Awards that include market conditions. Both models utilize various inputs with respect to expected lives, risk-free interest rates, historical volatility and dividend yield. The assumptions we use in the valuation model are based on subjective future expectations combined with management judgment. Volatility is one of the most significant determinants of fair value. We estimate our volatility using the actual historic volatility of our stock price. We estimate our expected risk-free interest rate by using the zero-coupon U.S. Treasury rate at the time of the grant related to the expected life of the grant. Expected forfeitures must be estimated to offset the compensation cost expected to be recorded in the financial statements. We estimate forfeitures based on historical information about turnover for each appropriate employee level. As vesting tiers within an Option are more frequent after the first year until fully vested, forfeitures on options are recorded as they actually occur. We estimate the annualized dividend yield by dividing the current annualized dividend by the closing stock price on the date of grant. If any of the assumptions used in the model changes, stock-based compensation for future awards may differ materially compared to the awards granted previously. |
| Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from initial estimates. Stock-based compensation expense is recorded net of estimated forfeitures such that expense is recorded only for those stock-based awards that are expected to vest. Previously recognized expense is reversed for the portion of awards forfeited prior to vesting as and when forfeitures occurred. |
| Most Options granted vest 25% in the first year and quarterly thereafter for three or four years and generally have seven year contract lives. For Awards, the expected life for amortization of the grant date fair value is the vesting term, generally three years in the case of deferred stock units and four years in the case of restricted stock units. We issue new shares of common stock upon the exercise of Options. |
| Grants with only a performance condition requirement are evaluated periodically for the estimated number of shares that might be issued when fully vested. The fair value measurement and its effect on income is then adjusted as a result of these periodic evaluations. If our estimate of the number of shares expected to be earned (vested) changes, we will be required to adjust the amount of equity-based compensation recognized for the service provided to the date of the change in estimate, on a cumulative basis, to reflect the higher or lower number of shares expected to vest. Such adjustments could materially increase or decrease the amount of equity-based compensation recognized in any period, particularly the period of the change in the estimate, and in aggregate as compared to the initial fair value measurement. Therefore, the use of performance-based forms of equity-based compensation can cause more volatility in our net income in various periods and in aggregate. We do not currently have any grants that include only a performance condition requirement. |
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| Loss Contingencies | ' |
| Loss Contingencies—We estimate and accrue loss contingencies at the point that the losses become probable. For litigation, our practice is to include an estimate of legal costs for defense. |
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| Retirement Benefits | ' |
| Retirement Benefits—We sponsor a 401(K) savings and investment plan that allows eligible U.S employees to participate in making pre-tax contributions to the 401(K). We match the employee contributions on a dollar-for-dollar basis up to a certain predetermined percentage. Employees fully vest in the matching contributions after five years of service. We made matching contributions of $5.4 million, $6.2 million, and $6.8 million during fiscal years 2013, 2012, and 2011 respectively. |
| We also have voluntary defined contribution plans in various non-U.S. locations. We also maintain a limited number of defined benefit plans for certain non-U.S. locations. Total costs under these plans were $3.6 million, $1.3 million, and $1.3 million during fiscal years 2013, 2012, and 2011 respectively. Accrued liabilities relating to these unfunded plans were $7.5 million and $5.1 million as of January 3, 2014 and December 28, 2012, respectively. |
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| Foreign Currency Translation | ' |
| Foreign Currency Translation— For subsidiaries in which the functional currency is the local currency, gains and losses resulting from translation of foreign currency financial statements into U.S. dollars are recorded as a component of accumulated other comprehensive income. Cumulative translation adjustments in accumulated OCI were $2.7 million, $3.2 million and $3.0 million as of January 3, 2014, December 28, 2012 and December 30, 2011, respectively. For subsidiaries where the functional currency is the U.S. dollar, gains and losses resulting from remeasuring transactions denominated in currencies other than the US dollar have not been significant for any period presented. |
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| Segment Information | ' |
| Segment Information—We report our results in one reportable segment. We design and develop innovative power management and precision analog integrated circuits (“ICs”). Our chief executive officer is our chief operating decision maker. |
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| Use of Estimates | ' |
| Use of Estimates—The financial statements have been prepared in conformity with accounting principles generally accepted in the United States and require management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. |
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| Recent Accounting Guidance | ' |
| Recent Adopted Accounting Guidance - In December 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2011-11 “Disclosures about Offsetting Assets and Liabilities.” The standard requires additional disclosure to enhance the comparability of U.S. GAAP and International Financial Reporting Standards financial statements. In January 2013, the FASB issued Accounting Standards Update 2013-01 "Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities." This standard provided additional guidance on the scope of ASU 2011-11. Retrospective application is required and the guidance concerns disclosure only. The standard was effective for our first quarter of fiscal year 2013 and did not have a material impact on our financial statements. |
| In February 2013, the FASB issued ASU No. 2013-02, "Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income." Under ASU 2013-02, an entity is required to provide information about the amounts reclassified out of Accumulated OCI by component. In addition, an entity is required to present, either on the face of the financial statements or in the notes, significant amounts reclassified out of Accumulated OCI by the respective line items of net income, but only if the amount reclassified is required to be reclassified in its entirety in the same reporting period. For amounts that are not required to be reclassified in their entirety to net income, an entity is required to cross-reference to other disclosures that provide additional details about those amounts. ASU 2013-02 does not change the current requirements for reporting net income or other comprehensive income in the financial statements. ASU 2013-02 was effective for our first quarter of fiscal year 2013 and did not have a material impact on our financial statements. |
| In July 2012, the FASB ASU No. 2012-02, Intangibles—Goodwill and Other (Topic 350)—Testing Indefinite- Lived Intangible Assets for Impairment. ASU 2012-02 permits an entity to first assess qualitative factors to determine whether it is more likely than not that an indefinite-lived intangible asset is impaired as a basis for determining whether it is necessary to perform the quantitative impairment test in accordance with Subtopic 350-30. If an entity concludes that it is not more likely than not that the indefinite-lived intangible asset is impaired, then no further action is required. If an entity concludes otherwise, then it is required to determine the fair value of the indefinite-lived intangible asset and perform the quantitative impairment test. ASU 2012-02 was effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012, with early adoption permitted. The adoption of this ASU did not have a material impact on our financial statements. (See Note 8) |
| Recent Accounting Guidance Not Yet Adopted - In July 2013, the FASB issued an amendment to the accounting guidance related to the financial statement presentation of an unrecognized tax benefit when a net operating loss carryforward, a similar tax loss or a tax credit carryforward exists. The guidance requires an unrecognized tax benefit to be presented as a decrease in a deferred tax asset where a net operating loss, a similar tax loss, or a tax credit carryforward exists and certain criteria are met. This guidance is effective for our first quarter of fiscal year 2014. The adoption of this guidance will not have a significant impact on our results of operations and financial position. |
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