SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
Mar. 31, 2012
Accounting Policies [Abstract]
Management's use of Estimates and Assumptions [Policy Text Block]	Management's Use of Estimates and Assumptions The preparation of consolidated financial statements in accordance with generally accepted accounting principles in the United States of America ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. These estimates are based on information available as of the date of the financial statements. Actual results could differ materially from those estimates.
Principles of Consolidation [Policy Text Block]	Principles of Consolidation The consolidated financial statements include the accounts of Plantronics and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.
Reclassifications [Policy Text Block]	Reclassifications Certain financial statement reclassifications have been made to previously reported amounts to conform to the current year's presentation.
Segment Information [Policy Text Block]	Segment Information Prior to December 1, 2009, the Company operated under two reportable segments, the Audio Communications Group (“ACG”) and the Audio Entertainment Group (“AEG”). As set forth in Note 4, Discontinued Operations, the Company completed the sale of Altec Lansing, its AEG segment, effective December 1, 2009, and, therefore, it is no longer included in continuing operations and the Company operates as one segment. Accordingly, the Company has classified the AEG operating results, including the loss on sale of AEG, as discontinued operations in the Consolidated statement of operations for all periods presented.
Fiscal Year [Policy Text Block]	Fiscal Year The Company’s fiscal year ends on the Saturday closest to the last day of March. Fiscal year 2012 ended on March 31, 2012 and consists of 52 weeks, fiscal year 2011 ended on April 2, 2011 and consists of 52 weeks, and fiscal year 2010 ended on April 3, 2010 and consists of 53 weeks. For purposes of presentation, the Company has indicated its accounting fiscal year as ending on March 31.
Financial Instruments [Policy Text Block]	Financial Instruments Cash, Cash Equivalents and Investments The Company's investment policy and strategy are focused on preservation of capital and supporting liquidity requirements. A portion of the Company's cash is managed by external managers within the guidelines of the Company's investment policy. The Company's exposure to market risk for changes in interest rates relates primarily to its investment portfolio. The Company's policy limits the amount of credit exposure to any one issuer and requires investments to be rated A or A2 and above, with the objective of minimizing the potential risk of principal loss. All highly liquid investments with initial stated maturities of three months or less at the date of purchase are classified as cash equivalents. The Company classifies its investments as either short-term or long-term based on each instrument's underlying effective maturity date and reasonable expectations with regard to sales and redemptions of the instruments. All short-term investments have effective maturities less than 12 months, while all long-term investments have effective maturities greater than 12 months or the Company does not currently have the ability to liquidate the investments. The Company may sell its investments prior to their stated maturities for strategic purposes, in anticipation of credit deterioration, or for duration management. As of March 31, 2012, all investments were classified as available-for-sale with unrealized gains and losses recorded as a separate component of Accumulated other comprehensive income in Stockholders’ equity. The specific identification method is used to determine the cost of securities disposed of, with realized gains and losses reflected in Interest and other income (expense), net. For investments with an unrealized loss, the factors considered in the review include the credit quality of the issuer, the duration that the fair value has been less than the adjusted cost basis, severity of impairment, reason for the decline in value and potential recovery period, the financial condition and near-term prospects of the investees, and whether the Company would be required to sell an investment due to liquidity or contractual reasons before its anticipated recovery. (See Note 5) Foreign Currency Derivatives The Company accounts for its derivative instruments as either assets or liabilities and carries them at fair value. Derivative foreign currency call and put option contracts are valued using pricing models that use observable inputs. The accounting for changes in the fair value of a derivative depends on the intended use of the derivative and the resulting designation. For derivative instruments designated as a fair value hedge, the gain or loss is recognized in earnings in the period of change together with the offsetting loss or gain on the hedged item attributed to the risk being hedged. For a derivative instrument designated as a cash flow hedge, the effective portion of the derivative’s gain or loss is initially reported as a component of Accumulated other comprehensive income in Stockholders’ equity and subsequently reclassified into earnings when the hedged exposure affects earnings. The ineffective portion of the gain or loss is reported in earnings immediately. For derivative instruments that are not designated as accounting hedges, changes in fair value are recognized in earnings in the period of change. The Company does not hold or issue derivative financial instruments for speculative trading purposes. Plantronics enters into derivatives only with counterparties that are among the largest United States ("U.S.") banks, ranked by assets, in order to minimize its credit risk and to date, no such counterparty has failed to meet its financial obligations under such contracts. (See Note 16)
Allowance for Doubtful Accounts [Policy Text Block]	Provision for Doubtful Accounts The Company maintains a provision for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. Plantronics regularly performs credit evaluations of its customers’ financial conditions and considers factors such as historical experience, credit quality, age of the accounts receivable balances, geographic or country-specific risks and economic conditions that may affect a customer’s ability to pay.
Inventory and Related Reserves [Policy Text Block]	Inventory and Related Reserves Inventories are valued at the lower of cost or market. Cost is computed using standard cost, which approximates actual cost on a first-in, first-out basis. Shipping and handling costs incurred in connection with the sale of products are included in Cost of revenues. Management writes down inventories that have become obsolete or are in excess of anticipated demand or net realizable value to the lower of cost or market value. Once inventory is written down, subsequent changes in facts and circumstances do not result in restoration to the original cost basis or an increase in the new, lower-cost basis.
Product Warranty Obligations [Policy Text Block]	Product Warranty Obligations The Company records a liability for the estimated costs of warranties at the time the related revenue is recognized. The specific warranty terms and conditions range from one to two years starting from the delivery date to the end user and vary depending upon the product sold and the country in which the Company does business. Factors that affect the warranty obligations include product failure rates, estimated return rates, material usage and service delivery costs incurred in correcting product failures.
Goodwill and Purchased Intangibles [Policy Text Block]	Goodwill and Purchased Intangibles Goodwill has been measured as the excess of the cost of acquisition over the amount assigned to tangible and identifiable intangible assets acquired less liabilities assumed. At least annually, in the fourth quarter of each fiscal year or more frequently if indicators of impairment exist, management performs a review to determine if the carrying value of goodwill is impaired. The identification and measurement of goodwill impairment involves the estimation of fair value at the Company’s reporting unit level. The Company determines its reporting units by assessing whether discrete financial information is available and if segment management regularly reviews the results of that component. The Company has determined it has one reporting unit. The Company performs an initial assessment of qualitative factors to determine whether the existence of events and circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of relevant events and circumstances, the Company determines that it is more likely than not that the fair value of the reporting unit exceeds its carrying value and there is no indication of impairment, no further testing is performed; however, if the Company concludes otherwise, the first step of the two-step impairment test must be performed by estimating the fair value of the reporting unit and comparing it with its carrying value, including goodwill. (See Note 8)
Property, Plant and Equipment [Policy Text Block]	Property, Plant and Equipment Property, plant and equipment is stated at cost less accumulated depreciation and amortization. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, which range from two to thirty years. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the estimated useful lives of the assets or the remaining lease term. Costs associated with internal-use software are recorded in accordance with the Intangibles - Goodwill and Other Topic of the Accounting Standards Codification ("ASC"). Capitalized software costs are amortized on a straight-line basis over the estimated useful life. Long-lived assets, including property, plant and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. The Company recognizes an impairment charge in the event the net book value of such assets exceeds the future undiscounted cash flows attributable to the assets. No material impairment losses were incurred in the periods presented.
Fair Value Measurements [Policy Text Block]	Fair Value Measurements The Company applies fair value accounting for all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed at fair value in the financial statements. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement: Level 1 The Company's Level 1 financial assets consist of cash, money market funds, U.S. Treasury Bills, and derivative foreign currency forward contracts that are traded in an active market with sufficient volume and frequency of transactions. Level 1 financial liabilities consist of derivative contracts that have closed but have not settled. The fair value of Level 1 financial instruments is measured based on the quoted market price of identical securities. Level 2 The Company's Level 2 financial assets and liabilities consist of Government Agency Securities, Commercial Paper, U.S. Corporate Bonds, Certificates of Deposit ("CDs"), and derivative foreign currency call and put option contracts. The fair value of Level 2 investment securities is determined based on other observable inputs, including multiple non-binding quotes from independent pricing services. Non-binding quotes are based on proprietary valuation models that are prepared by the independent pricing services and use algorithms based on inputs such as observable market data, quoted market prices for similar securities, issuer spreads and internal assumptions of the broker. The Company corroborates the reasonableness of non-binding quotes received from the independent pricing services using a variety of techniques depending on the underlying instrument, including: (i) comparing them to actual experience gained from the purchases and maturities of investment securities, (ii) comparing them to internally developed cash flow models based on observable inputs, and (iii) monitoring changes in ratings of similar securities and the related impact on fair value. The fair value of Level 2 derivative foreign currency call and put option contracts is determined using pricing models that use observable market inputs. Level 3 The fair value of Level 3 financial instruments is determined using inputs that are unobservable and reflect the Company's estimate of assumptions that market participants would use in pricing the asset or liability. The Company had no Level 3 assets or liabilities as of March 31, 2012 or 2011. In accordance with the fair value accounting requirements, companies may choose to measure eligible financial instruments and certain other items at fair value. The Company has not elected the fair value option for any eligible financial instruments.
Revenue Recognition [Policy Text Block]	Revenue Recognition The Company sells its products directly to customers and through other distribution channels, including distributors, retailers, carriers and original equipment manufacturers ("OEMs"). The Company's revenue is derived primarily from the sale of headsets, telephone headset systems and accessories for the business and consumer markets and is recognized when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the sales price is fixed or determinable and collection is reasonably assured. These criteria are usually met at the time of product shipment; however, the Company defers revenue when any significant obligations remain and to date this has accounted for less than 1% of the Company's Net revenues. Customer purchase orders and/or contracts are used to determine the existence of an arrangement. Product is considered delivered once it has been shipped and title and risk of loss have been transferred to the customer. The Company assesses whether a price is fixed or determinable based upon the selling terms associated with the transaction and whether the sales price is subject to refund or adjustment. The Company assesses collectibility based on a customer's credit quality, historical experience, and geographic or country-specific risks and economic conditions that may affect a customer's ability to pay. Sales through retail and distribution channels are made primarily under agreements or commitments allowing for rights of return and include various sales incentive programs, such as rebates, advertising, price protection and other sales incentives. The Company has an established sales history for these arrangements and records the estimated reserves and allowances at the time the related revenue is recognized. Sales return reserves are estimated based on historical data, relevant current data and the monitoring of inventory build-up in the distribution channel. The allowance for sales incentive programs is based on historical experience and contractual terms or commitments in the form of lump sum payments or sell-through credits.
Research, Development and Engineering [Policy Text Block]	Research, Development and Engineering Research, development and engineering costs are expensed as incurred and consist primarily of compensation costs, outside services, including legal fees associated with protecting the Company's intellectual property, expensed materials, depreciation, and an allocation of overhead expenses, including facilities, IT and human resources costs.
Advertising Costs [Policy Text Block]	Advertising Costs The Company expenses all advertising costs as incurred. Advertising expense for the years ended March 31, 2012, 2011 and 2010 was $2.6 million, $2.4 million and $4.6 million, respectively.
Income Taxes [Policy Text Block]	Income Taxes The Company is subject to income taxes in the U.S. and foreign jurisdictions. At any one time, multiple tax years are subject to audit by the various tax authorities. The Company recognizes the impact of an uncertain income tax position on income tax expense at the largest amount that is more-likely-than-not to be sustained. An unrecognized tax benefit will not be recognized unless it has a greater than 50% likelihood of being sustained. The Company adjusts its tax liability for unrecognized tax benefits in the period in which an uncertain tax position is effectively settled, the statute of limitations expires for the relevant taxing authority to examine the tax position, or when more information becomes available. The Company recognizes interest and penalties related to income tax matters as a part of its provision for income taxes. (See Note 17)
Earnings Per Share [Policy Text Block]	Earnings Per Share Basic earnings per share is computed by dividing the net income for the period by the weighted average number of common shares outstanding during the period, less common stock subject to repurchase. Diluted earnings per share is computed by dividing the net income for the period by the weighted average number of shares of common stock and potentially dilutive common stock outstanding during the period. Potentially dilutive common shares include shares issuable upon the exercise of outstanding stock options, the vesting of awards of restricted stock and the estimated shares to be purchased under the Company’s employee stock purchase plan, which are reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, the amount that the employee must pay for exercising stock options, the amount of stock-based compensation cost for future services that the Company has not yet recognized, and the amount of tax benefit that would be recorded in additional paid-in capital upon exercise are assumed to be used to repurchase shares. (See Note 18)
Comprehensive Income [Policy Text Block]	Comprehensive Income Comprehensive income consists of two components, net income and other comprehensive income. Other comprehensive income refers to income, expenses, gains, and losses that under U.S. GAAP are recorded as an element of stockholders’ equity but are excluded from net income. Accumulated other comprehensive income, as presented in the accompanying consolidated balance sheets, consists of foreign currency translation adjustments, unrealized gains and losses on derivatives designated as cash flow hedges, net of tax, and unrealized gains and losses related to the Company’s investments, net of tax.
Foreign Operations and Currency Translations [Policy Text Block]	Foreign Operations and Currency Translation The functional currency of the Company’s foreign sales and marketing offices, except as noted in the following paragraph, is the local currency of the respective operations. For these foreign operations, the Company translates assets and liabilities into U.S. dollars using the period-end exchange rates in effect as of the balance sheet date and translates revenues and expenses using the average monthly exchange rates. The resulting cumulative translation adjustments are included in Accumulated other comprehensive income, a separate component of Stockholders' equity in the accompanying consolidated balance sheets. The functional currency of the Company’s European finance, sales and logistics headquarters in the Netherlands, sales office and warehouse in Japan, manufacturing facilities in Tijuana, Mexico and logistic and research and development facilities in China, is the U.S. Dollar. For these foreign operations, assets and liabilities denominated in foreign currencies are re-measured at the period-end or historical rates, as appropriate. Revenues and expenses are re-measured at average monthly rates which the Company believes to be a fair approximation of actual rates. Currency transaction gains and losses are recognized in current operations. (See Note 16)
Stock-Based Compensation Expense [Policy Text Block]	Stock-Based Compensation Expense The Company applies the provisions of the Compensation – Stock Compensation Topic of the FASB ASC, which requires the measurement and recognition of compensation expense for all share-based payment awards made to employees and non-employee directors based on estimated fair values. (See Note 12)
Treasury Shares [Policy Text Block]	Treasury Shares From time to time, the Company repurchases shares of its common stock, depending on market conditions, in the open market or through privately negotiated transactions, in accordance with programs authorized by the Board of Directors. Repurchased shares are held as treasury stock until such time as they are retired or re-issued. Retirements of treasury stock are non-cash equity transactions in which the reacquired shares are returned to the status of authorized but unissued shares and the cost is recorded as a reduction to both Retained earnings and Treasury stock. (See Note 13)
Concentration of Risk [Policy Text Block]	Concentration of Risk Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash equivalents, short-term and long-term investments and trade receivables. Plantronics’ investment policies for cash limit investments to those that are low risk and also limit the amount of credit exposure to any one issuer and restrict placement of these investments to issuers evaluated as creditworthy. As of March 31, 2012 and 2011, the Company's investments were composed of U.S. Treasury Bills, Government Agency Securities, Commercial Paper, U.S. Corporate Bonds and CDs. Concentrations of credit risk with respect to trade receivables are limited due to the large number of customers that comprise the Company’s customer base and their dispersion across different geographies and markets. Plantronics performs ongoing credit evaluations of its customers' financial condition and requires no collateral from its customers. The Company maintains a provision for doubtful accounts based upon expected collectibility of all accounts receivable. Certain inventory components required by the Company are only available from a limited number of suppliers. The rapid rate of technological change and the necessity of developing and manufacturing products with short lifecycles may intensify these risks. The inability to obtain components as required, or to develop alternative sources, as required in the future, could result in delays or reductions in product shipments, which in turn could have a material adverse effect on the Company’s business, financial condition, results of operations and cash flows.

SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Mar. 31, 2012

Management's use of Estimates and Assumptions [Policy Text Block]

Management's Use of Estimates and Assumptions

The preparation of consolidated financial statements in accordance with generally accepted accounting principles in the United States of America ("U.S. GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. These estimates are based on information available as of the date of the financial statements. Actual results could differ materially from those estimates.

Principles of Consolidation [Policy Text Block]

Principles of Consolidation

The consolidated financial statements include the accounts of Plantronics and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.

Reclassifications [Policy Text Block]

Reclassifications

Certain financial statement reclassifications have been made to previously reported amounts to conform to the current year's presentation.

Segment Information [Policy Text Block]

Segment Information

Prior to December 1, 2009, the Company operated under two reportable segments, the Audio Communications Group (“ACG”) and the Audio Entertainment Group (“AEG”). As set forth in Note 4, Discontinued Operations, the Company completed the sale of Altec Lansing, its AEG segment, effective December 1, 2009, and, therefore, it is no longer included in continuing operations and the Company operates as one segment. Accordingly, the Company has classified the AEG operating results, including the loss on sale of AEG, as discontinued operations in the Consolidated statement of operations for all periods presented.

Fiscal Year [Policy Text Block]

Fiscal Year

The Company’s fiscal year ends on the Saturday closest to the last day of March. Fiscal year 2012 ended on March 31, 2012 and consists of 52 weeks, fiscal year 2011 ended on April 2, 2011 and consists of 52 weeks, and fiscal year 2010 ended on April 3, 2010 and consists of 53 weeks. For purposes of presentation, the Company has indicated its accounting fiscal year as ending on March 31.

Financial Instruments [Policy Text Block]

Financial Instruments

Cash, Cash Equivalents and Investments

The Company's investment policy and strategy are focused on preservation of capital and supporting liquidity requirements. A portion of the Company's cash is managed by external managers within the guidelines of the Company's investment policy. The Company's exposure to market risk for changes in interest rates relates primarily to its investment portfolio. The Company's policy limits the amount of credit exposure to any one issuer and requires investments to be rated A or A2 and above, with the objective of minimizing the potential risk of principal loss. All highly liquid investments with initial stated maturities of three months or less at the date of purchase are classified as cash equivalents. The Company classifies its investments as either short-term or long-term based on each instrument's underlying effective maturity date and reasonable expectations with regard to sales and redemptions of the instruments. All short-term investments have effective maturities less than 12 months, while all long-term investments have effective maturities greater than 12 months or the Company does not currently have the ability to liquidate the investments. The Company may sell its investments prior to their stated maturities for strategic purposes, in anticipation of credit deterioration, or for duration management.

As of March 31, 2012, all investments were classified as available-for-sale with unrealized gains and losses recorded as a separate component of Accumulated other comprehensive income in Stockholders’ equity. The specific identification method is used to determine the cost of securities disposed of, with realized gains and losses reflected in Interest and other income (expense), net.

For investments with an unrealized loss, the factors considered in the review include the credit quality of the issuer, the duration that the fair value has been less than the adjusted cost basis, severity of impairment, reason for the decline in value and potential recovery period, the financial condition and near-term prospects of the investees, and whether the Company would be required to sell an investment due to liquidity or contractual reasons before its anticipated recovery. (See Note 5)

Foreign Currency Derivatives

The Company accounts for its derivative instruments as either assets or liabilities and carries them at fair value. Derivative foreign currency call and put option contracts are valued using pricing models that use observable inputs. The accounting for changes in the fair value of a derivative depends on the intended use of the derivative and the resulting designation. For derivative instruments designated as a fair value hedge, the gain or loss is recognized in earnings in the period of change together with the offsetting loss or gain on the hedged item attributed to the risk being hedged. For a derivative instrument designated as a cash flow hedge, the effective portion of the derivative’s gain or loss is initially reported as a component of Accumulated other comprehensive income in Stockholders’ equity and subsequently reclassified into earnings when the hedged exposure affects earnings. The ineffective portion of the gain or loss is reported in earnings immediately. For derivative instruments that are not designated as accounting hedges, changes in fair value are recognized in earnings in the period of change. The Company does not hold or issue derivative financial instruments for speculative trading purposes. Plantronics enters into derivatives only with counterparties that are among the largest United States ("U.S.") banks, ranked by assets, in order to minimize its credit risk and to date, no such counterparty has failed to meet its financial obligations under such contracts. (See Note 16)

Allowance for Doubtful Accounts [Policy Text Block]

Provision for Doubtful Accounts

The Company maintains a provision for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. Plantronics regularly performs credit evaluations of its customers’ financial conditions and considers factors such as historical experience, credit quality, age of the accounts receivable balances, geographic or country-specific risks and economic conditions that may affect a customer’s ability to pay.

Inventory and Related Reserves [Policy Text Block]

Inventory and Related Reserves

Inventories are valued at the lower of cost or market. Cost is computed using standard cost, which approximates actual cost on a first-in, first-out basis. Shipping and handling costs incurred in connection with the sale of products are included in Cost of revenues.

Management writes down inventories that have become obsolete or are in excess of anticipated demand or net realizable value to the lower of cost or market value. Once inventory is written down, subsequent changes in facts and circumstances do not result in restoration to the original cost basis or an increase in the new, lower-cost basis.

Product Warranty Obligations [Policy Text Block]

Product Warranty Obligations

The Company records a liability for the estimated costs of warranties at the time the related revenue is recognized. The specific warranty terms and conditions range from one to two years starting from the delivery date to the end user and vary depending upon the product sold and the country in which the Company does business. Factors that affect the warranty obligations include product failure rates, estimated return rates, material usage and service delivery costs incurred in correcting product failures.

Goodwill and Purchased Intangibles [Policy Text Block]

Goodwill and Purchased Intangibles

Goodwill has been measured as the excess of the cost of acquisition over the amount assigned to tangible and identifiable intangible assets acquired less liabilities assumed. At least annually, in the fourth quarter of each fiscal year or more frequently if indicators of impairment exist, management performs a review to determine if the carrying value of goodwill is impaired. The identification and measurement of goodwill impairment involves the estimation of fair value at the Company’s reporting unit level. The Company determines its reporting units by assessing whether discrete financial information is available and if segment management regularly reviews the results of that component. The Company has determined it has one reporting unit.

The Company performs an initial assessment of qualitative factors to determine whether the existence of events and circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If, after assessing the totality of relevant events and circumstances, the Company determines that it is more likely than not that the fair value of the reporting unit exceeds its carrying value and there is no indication of impairment, no further testing is performed; however, if the Company concludes otherwise, the first step of the two-step impairment test must be performed by estimating the fair value of the reporting unit and comparing it with its carrying value, including goodwill. (See Note 8)

Property, Plant and Equipment [Policy Text Block]

Property, Plant and Equipment

Property, plant and equipment is stated at cost less accumulated depreciation and amortization. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, which range from two to thirty years. Amortization of leasehold improvements is computed using the straight-line method over the shorter of the estimated useful lives of the assets or the remaining lease term. Costs associated with internal-use software are recorded in accordance with the Intangibles - Goodwill and Other Topic of the Accounting Standards Codification ("ASC"). Capitalized software costs are amortized on a straight-line basis over the estimated useful life.

Long-lived assets, including property, plant and equipment, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. The Company recognizes an impairment charge in the event the net book value of such assets exceeds the future undiscounted cash flows attributable to the assets. No material impairment losses were incurred in the periods presented.

Fair Value Measurements [Policy Text Block]

Fair Value Measurements

The Company applies fair value accounting for all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed at fair value in the financial statements. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement:

Level 1

The Company's Level 1 financial assets consist of cash, money market funds, U.S. Treasury Bills, and derivative foreign currency forward contracts that are traded in an active market with sufficient volume and frequency of transactions. Level 1 financial liabilities consist of derivative contracts that have closed but have not settled.

The fair value of Level 1 financial instruments is measured based on the quoted market price of identical securities.

Level 2

The Company's Level 2 financial assets and liabilities consist of Government Agency Securities, Commercial Paper, U.S. Corporate Bonds, Certificates of Deposit ("CDs"), and derivative foreign currency call and put option contracts.

The fair value of Level 2 investment securities is determined based on other observable inputs, including multiple non-binding quotes from independent pricing services. Non-binding quotes are based on proprietary valuation models that are prepared by the independent pricing services and use algorithms based on inputs such as observable market data, quoted market prices for similar securities, issuer spreads and internal assumptions of the broker. The Company corroborates the reasonableness of non-binding quotes received from the independent pricing services using a variety of techniques depending on the underlying instrument, including: (i) comparing them to actual experience gained from the purchases and maturities of investment securities, (ii) comparing them to internally developed cash flow models based on observable inputs, and (iii) monitoring changes in ratings of similar securities and the related impact on fair value.

The fair value of Level 2 derivative foreign currency call and put option contracts is determined using pricing models that use observable market inputs.

Level 3

The fair value of Level 3 financial instruments is determined using inputs that are unobservable and reflect the Company's estimate of assumptions that market participants would use in pricing the asset or liability. The Company had no Level 3 assets or liabilities as of March 31, 2012 or 2011.

In accordance with the fair value accounting requirements, companies may choose to measure eligible financial instruments and certain other items at fair value. The Company has not elected the fair value option for any eligible financial instruments.

Revenue Recognition [Policy Text Block]

Revenue Recognition

The Company sells its products directly to customers and through other distribution channels, including distributors, retailers, carriers and original equipment manufacturers ("OEMs"). The Company's revenue is derived primarily from the sale of headsets, telephone headset systems and accessories for the business and consumer markets and is recognized when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the sales price is fixed or determinable and collection is reasonably assured. These criteria are usually met at the time of product shipment; however, the Company defers revenue when any significant obligations remain and to date this has accounted for less than 1% of the Company's Net revenues. Customer purchase orders and/or contracts are used to determine the existence of an arrangement. Product is considered delivered once it has been shipped and title and risk of loss have been transferred to the customer. The Company assesses whether a price is fixed or determinable based upon the selling terms associated with the transaction and whether the sales price is subject to refund or adjustment. The Company assesses collectibility based on a customer's credit quality, historical experience, and geographic or country-specific risks and economic conditions that may affect a customer's ability to pay.

Sales through retail and distribution channels are made primarily under agreements or commitments allowing for rights of return and include various sales incentive programs, such as rebates, advertising, price protection and other sales incentives. The Company has an established sales history for these arrangements and records the estimated reserves and allowances at the time the related revenue is recognized. Sales return reserves are estimated based on historical data, relevant current data and the monitoring of inventory build-up in the distribution channel. The allowance for sales incentive programs is based on historical experience and contractual terms or commitments in the form of lump sum payments or sell-through credits.

Research, Development and Engineering [Policy Text Block]

Research, Development and Engineering

Research, development and engineering costs are expensed as incurred and consist primarily of compensation costs, outside services, including legal fees associated with protecting the Company's intellectual property, expensed materials, depreciation, and an allocation of overhead expenses, including facilities, IT and human resources costs.

Advertising Costs [Policy Text Block]

Advertising Costs

The Company expenses all advertising costs as incurred. Advertising expense for the years ended March 31, 2012, 2011 and 2010 was $2.6 million, $2.4 million and $4.6 million, respectively.

Income Taxes [Policy Text Block]

Income Taxes

The Company is subject to income taxes in the U.S. and foreign jurisdictions. At any one time, multiple tax years are subject to audit by the various tax authorities.

The Company recognizes the impact of an uncertain income tax position on income tax expense at the largest amount that is more-likely-than-not to be sustained. An unrecognized tax benefit will not be recognized unless it has a greater than 50% likelihood of being sustained. The Company adjusts its tax liability for unrecognized tax benefits in the period in which an uncertain tax position is effectively settled, the statute of limitations expires for the relevant taxing authority to examine the tax position, or when more information becomes available. The Company recognizes interest and penalties related to income tax matters as a part of its provision for income taxes. (See Note 17)

Earnings Per Share [Policy Text Block]

Earnings Per Share

Basic earnings per share is computed by dividing the net income for the period by the weighted average number of common shares outstanding during the period, less common stock subject to repurchase. Diluted earnings per share is computed by dividing the net income for the period by the weighted average number of shares of common stock and potentially dilutive common stock outstanding during the period. Potentially dilutive common shares include shares issuable upon the exercise of outstanding stock options, the vesting of awards of restricted stock and the estimated shares to be purchased under the Company’s employee stock purchase plan, which are reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, the amount that the employee must pay for exercising stock options, the amount of stock-based compensation cost for future services that the Company has not yet recognized, and the amount of tax benefit that would be recorded in additional paid-in capital upon exercise are assumed to be used to repurchase shares. (See Note 18)

Comprehensive Income [Policy Text Block]

Comprehensive Income

Comprehensive income consists of two components, net income and other comprehensive income. Other comprehensive income refers to income, expenses, gains, and losses that under U.S. GAAP are recorded as an element of stockholders’ equity but are excluded from net income. Accumulated other comprehensive income, as presented in the accompanying consolidated balance sheets, consists of foreign currency translation adjustments, unrealized gains and losses on derivatives designated as cash flow hedges, net of tax, and unrealized gains and losses related to the Company’s investments, net of tax.

Foreign Operations and Currency Translations [Policy Text Block]

Foreign Operations and Currency Translation

The functional currency of the Company’s foreign sales and marketing offices, except as noted in the following paragraph, is the local currency of the respective operations. For these foreign operations, the Company translates assets and liabilities into U.S. dollars using the period-end exchange rates in effect as of the balance sheet date and translates revenues and expenses using the average monthly exchange rates. The resulting cumulative translation adjustments are included in Accumulated other comprehensive income, a separate component of Stockholders' equity in the accompanying consolidated balance sheets.

The functional currency of the Company’s European finance, sales and logistics headquarters in the Netherlands, sales office and warehouse in Japan, manufacturing facilities in Tijuana, Mexico and logistic and research and development facilities in China, is the U.S. Dollar. For these foreign operations, assets and liabilities denominated in foreign currencies are re-measured at the period-end or historical rates, as appropriate. Revenues and expenses are re-measured at average monthly rates which the Company believes to be a fair approximation of actual rates. Currency transaction gains and losses are recognized in current operations. (See Note 16)

Stock-Based Compensation Expense [Policy Text Block]

Stock-Based Compensation Expense

The Company applies the provisions of the Compensation – Stock Compensation Topic of the FASB ASC, which requires the measurement and recognition of compensation expense for all share-based payment awards made to employees and non-employee directors based on estimated fair values. (See Note 12)

Treasury Shares [Policy Text Block]

Treasury Shares

From time to time, the Company repurchases shares of its common stock, depending on market conditions, in the open market or through privately negotiated transactions, in accordance with programs authorized by the Board of Directors. Repurchased shares are held as treasury stock until such time as they are retired or re-issued. Retirements of treasury stock are non-cash equity transactions in which the reacquired shares are returned to the status of authorized but unissued shares and the cost is recorded as a reduction to both Retained earnings and Treasury stock. (See Note 13)

Concentration of Risk [Policy Text Block]

Concentration of Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash equivalents, short-term and long-term investments and trade receivables.

Plantronics’ investment policies for cash limit investments to those that are low risk and also limit the amount of credit exposure to any one issuer and restrict placement of these investments to issuers evaluated as creditworthy. As of March 31, 2012 and 2011, the Company's investments were composed of U.S. Treasury Bills, Government Agency Securities, Commercial Paper, U.S. Corporate Bonds and CDs.

Concentrations of credit risk with respect to trade receivables are limited due to the large number of customers that comprise the Company’s customer base and their dispersion across different geographies and markets. Plantronics performs ongoing credit evaluations of its customers' financial condition and requires no collateral from its customers. The Company maintains a provision for doubtful accounts based upon expected collectibility of all accounts receivable.

Certain inventory components required by the Company are only available from a limited number of suppliers. The rapid rate of technological change and the necessity of developing and manufacturing products with short lifecycles may intensify these risks. The inability to obtain components as required, or to develop alternative sources, as required in the future, could result in delays or reductions in product shipments, which in turn could have a material adverse effect on the Company’s business, financial condition, results of operations and cash flows.