Cirrus Logic (CRUS) 10-K 28 May 14 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Mar. 29, 2014	23-May-14	Sep. 27, 2013
Document and Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Entity Registrant Name	'CIRRUS LOGIC INC	'	'
Entity Central Index Key	'0000772406	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Document Period End Date	29-Mar-14	'	'
Document Fiscal Year Focus	'2014	'	'
Document Fiscal Period Focus	'FY	'	'
Current Fiscal Year End Date	'--03-29	'	'
Entity Common Stock, Shares Outstanding	'	62,058,267	'
Entity Public Float	'	'	$1,114,423,592

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Assets	'	'
Cash and cash equivalents	$31,850	$66,402
Marketable securities	263,417	105,235
Accounts receivable, net	63,220	69,289
Inventories	69,743	119,300
Deferred tax assets	22,024	64,937
Other current assets	25,079	19,371
Total current assets	475,333	444,534
Long-term marketable securities	89,243	64,910
Property and equipment, net	103,650	100,623
Goodwill and intangibles, net	28,366	10,677
Deferred tax assets	25,065	16,671
Other assets	3,087	13,932
Total assets	724,744	651,347
Liabilities and Stockholders' Equity	'	'
Accounts payable	51,932	60,827
Accrued salaries and benefits	13,388	16,592
Deferred income	5,631	4,956
Software license agreement	7,023	6,424
Other accrued liabilities	4,549	4,280
Total current liabilities	82,523	93,079
Long-term liabilities	4,863	10,094
Stockholders' equity:	'	'
Preferred stock, 5.0 million shares authorized but unissued	'	'
Common stock, $0.001 par value, 280,000 shares authorized, 61,956 shares and 63,291 shares issued and outstanding at March 29, 2014 and March 30, 2013, respectively	62	63
Additional paid-in capital	1,078,816	1,041,771
Accumulated deficit	-440,634	-492,741
Accumulated other comprehensive loss	-886	-919
Total stockholders' equity	637,358	548,174
Total liabilities and stockholders' equity	$724,744	$651,347

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 29, 2014	Mar. 30, 2013
Consolidated Balance Sheets [Abstract]	'	'
Preferred Stock, shares authorized but unissued	5,000,000	5,000,000
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	280,000,000	280,000,000
Common stock, shares issued	61,956,000	63,291,000
Common stock, shares outstanding	61,956,000	63,291,000

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Consolidated Statements of Comprehensive Income [Abstract]	'	'	'
Net sales	$714,338	$809,786	$426,843
Cost of sales	358,175	414,595	196,402
Gross profit	356,163	395,191	230,441
Operating expenses:	'	'	'
Research and development	126,189	114,071	85,697
Selling, general and administrative	74,861	76,998	65,208
Patent infringement settlements, net	695	'	'
Restructuring and other, net	-598	3,292	'
Total operating expenses	201,147	194,361	150,905
Income from operations	155,016	200,830	79,536
Interest income, net	848	440	517
Other expense, net	-127	-80	-70
Income before income taxes	155,737	201,190	79,983
Provision (benefit) for income taxes	47,626	64,592	-8,000
Net income	108,111	136,598	87,983
Change in unrealized gain (loss) on marketable securities, net of tax	33	-157	-8
Comprehensive income	$108,144	$136,441	$87,975
Basic earnings per share	$1.72	$2.12	$1.35
Diluted earnings per share	$1.65	$2	$1.29
Basic weighted average common shares outstanding	62,926	64,580	64,934
Diluted weighted average common shares outstanding	65,535	68,454	68,063

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Cash flows from operating activities:	'	'	'
Net income	$108,111	$136,598	$87,983
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Depreciation and amortization	14,883	13,562	9,972
Stock compensation expense	23,074	21,495	12,178
Deferred income taxes	35,959	60,600	-10,154
Loss on retirement or write-off of long-lived assets	568	'	23
Excess tax benefit related to the exercise of employee stock options	-8,445	-106	'
Other non-cash charges	5,760	4,792	'
Net change in operating assets and liabilities:	'	'	'
Accounts receivable, net	6,815	-25,232	-5,055
Inventories	49,557	-67,606	-15,418
Other assets	1,239	134	-9,783
Accounts payable	-9,443	22,423	10,469
Accrued salaries and benefits	-3,169	3,260	1,232
Deferred income	660	-2,272	384
Income taxes payable	9,496	263	-130
Other accrued liabilities	-7,027	-7,087	1,494
Net cash provided by operating activities	228,038	160,824	83,195
Cash flows from investing activities:	'	'	'
Proceeds from sale of available for sale marketable securities	139,037	127,336	181,282
Purchases of available for sale marketable securities	-321,519	-178,847	-127,852
Purchases of property, equipment and software	-15,058	-52,902	-35,948
Acquisition of Acoustic Technologies, net of cash obtained	-20,402	'	'
Proceeds from sale of Apex assets	'	22,220	'
Investments in technology	-2,296	-3,009	-6,604
Decrease in restricted investments	'	'	5,786
(Increase) decrease in deposits and other assets	-111	402	1,773
Net cash (used in) provided by investing activities	-220,349	-84,800	18,437
Cash flows from financing activities:	'	'	'
Issuance of common stock, net of shares withheld for taxes	5,320	12,008	4,108
Repurchase and retirement of common stock	-52,138	-86,059	-76,782
Repurchase of stock to satisfy employee tax withholding obligations	-3,868	-1,674	'
Excess tax benefit related to the exercise of employee stock options	8,445	106	'
Net cash used in financing activities	-42,241	-75,619	-72,674
Net (decrease) increase in cash and cash equivalents	-34,552	405	28,958
Cash and cash equivalents at beginning of period	66,402	65,997	37,039
Cash and cash equivalents at end of period	31,850	66,402	65,997
Cash payments during the year for:	'	'	'
Income taxes	$2,118	$5,125	$2,268

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]	Total
In Thousands
Balance at Mar. 26, 2011	$69	$991,878	($552,814)	($754)	$438,379
Balance, shares at Mar. 26, 2011	68,664	'	'	'	'
Net income	'	'	87,983	'	87,983
Change in unrealized gain (loss) on marketable securities, net of tax	'	'	'	-8	-8
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, value	'	4,108	'	'	4,108
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, shares	642	'	'	'	'
Repurchase and retirement of common stock, value	-5	'	-76,778	'	-76,783
Repurchase and retirement of common stock, shares	-4,912	'	'	'	'
Amortization of deferred stock compensation	'	12,178	'	'	12,178
Balance at Mar. 31, 2012	64	1,008,164	-541,609	-762	465,857
Balance, shares at Mar. 31, 2012	64,394	'	'	'	'
Net income	'	'	136,598	'	136,598
Change in unrealized gain (loss) on marketable securities, net of tax	'	'	'	-157	-157
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, value	2	12,006	-1,674	'	10,334
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, shares	1,907	'	'	'	'
Repurchase and retirement of common stock, value	-3	'	-86,056	'	-86,059
Repurchase and retirement of common stock, shares	-3,010	'	'	'	'
Amortization of deferred stock compensation	'	21,495	'	'	21,495
Excess tax benefit from employee stock options	'	106	'	'	106
Balance at Mar. 30, 2013	63	1,041,771	-492,741	-919	548,174
Balance, shares at Mar. 30, 2013	63,291	'	'	'	'
Net income	'	'	108,111	'	108,111
Change in unrealized gain (loss) on marketable securities, net of tax	'	'	'	33	33
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, value	1	5,319	-3,868	'	1,452
Issuance of stock under stock option plans and other, net of shares withheld for employee taxes, shares	1,301	'	'	'	'
Repurchase and retirement of common stock, value	-2	'	-52,136	'	-52,138
Repurchase and retirement of common stock, shares	-2,636	'	'	'	'
Amortization of deferred stock compensation	'	23,281	'	'	23,281
Excess tax benefit from employee stock options	'	8,445	'	'	8,445
Balance at Mar. 29, 2014	$62	$1,078,816	($440,634)	($886)	$637,358
Balance, shares at Mar. 29, 2014	61,956	'	'	'	'

Description_of_Business

Description of Business	12 Months Ended
	Mar. 29, 2014
Description of Business [Abstract]	'
Description of Business	'
	1.      Description of Business
	Description of Business
	Cirrus Logic, Inc. (“Cirrus Logic,” “We,” “Us,” “Our,” or the “Company”) develops high-precision, analog and mixed-signal integrated circuits (“ICs”) for a broad range of consumer and industrial markets.  Building on our diverse analog mixed-signal patent portfolio, Cirrus Logic delivers highly optimized products for consumer and professional audio, automotive entertainment, and targeted industrial applications including energy control, energy management, light emitting diode (“LED”) and energy exploration.
	We were incorporated in California in 1984, became a public company in 1989, and were reincorporated in the State of Delaware in February 1999.  Our primary facility housing engineering, sales and marketing, and administration functions is located in Austin, Texas.  In addition, we have sales locations internationally and throughout the United States.  Specifically, we serve customers from international sales offices in Europe and Asia, including the People’s Republic of China, Hong Kong, South Korea, Japan, Singapore, Taiwan, and the United Kingdom.  Our common stock, which has been publicly traded since 1989, is listed on the NASDAQ Global Select Market under the symbol CRUS.
	Basis of Presentation
	We prepare financial statements on a 52- or 53-week year that ends on the last Saturday in March.  Fiscal years 2014 and 2013 were 52-week years, whereas fiscal year 2012 was a 53-week year.
	Principles of Consolidation
	The accompanying consolidated financial statements have been prepared in accordance with U. S. generally accepted accounting principles (U.S. GAAP) and include the accounts of the Company and its wholly-owned subsidiaries.  All significant intercompany balances and transactions have been eliminated.
	Reclassifications
	Certain reclassifications have been made to prior year balances in order to conform to the current year’s presentation of financial information.
	Use of Estimates
	The preparation of financial statements in accordance with U.S. GAAP requires the use of management estimates.  These estimates are subjective in nature and involve judgments that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at fiscal year-end and the reported amounts of revenue and expenses during the reporting period.  Actual results could differ from these estimates.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Mar. 29, 2014
Summary of Significant Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	2.      Summary of Significant Accounting Policies
	Cash and Cash Equivalents
	Cash and cash equivalents consist primarily of money market funds, commercial paper, and U.S. Government Treasury and Agency instruments with original maturities of three months or less at the date of purchase.
	Marketable Securities
	We determine the appropriate classification of marketable securities at the time of purchase and reevaluate this designation as of each balance sheet date.  We classify these securities as either held-to-maturity, trading, or available-for-sale.  As of March 29, 2014 and March 30, 2013, all marketable securities were classified as available-for-sale securities.  The Company classifies its investments as “available for sale” because it expects to possibly sell some securities prior to maturity.  The Company’s investments are subject to market risk, primarily interest rate and credit risk.  The Company’s investments are managed by an outside professional manager within investment guidelines set by the Company.  Such guidelines include security type, credit quality, and maturity, and are intended to limit market risk by restricting the Company’s investments to high quality debt instruments with relatively short-term maturities.  The fair value of investments is determined using observable or quoted market prices for those securities.
	Available-for-sale securities are carried at fair value, with unrealized gains and losses included as a component of accumulated other comprehensive loss.  Realized gains and losses, declines in value judged to be other than temporary, and interest on available-for-sale securities are included in net income.  The cost of securities sold is based on the specific identification method.
	Inventories
	We use the lower of cost or market method to value our inventories, with cost being determined on a first-in, first-out basis.  One of the factors we consistently evaluate in the application of this method is the extent to which products are accepted into the marketplace.  By policy, we evaluate market acceptance based on known business factors and conditions by comparing forecasted customer unit demand for our products over a specific future period, or demand horizon, to quantities on hand at the end of each accounting period.
	On a quarterly and annual basis, we analyze inventories on a part-by-part basis.  Product life cycles and the competitive nature of the industry are factors considered in the evaluation of customer unit demand at the end of each quarterly accounting period.  Inventory quantities on-hand in excess of forecasted demand is considered to have reduced market value and, therefore, the cost basis is adjusted to the lower of cost or market.  Typically, market values for excess or obsolete inventories are considered to be zero.  During fiscal year 2013, the Company recorded excess and obsolete inventory charges of $25.5 million, primarily associated with a customer build forecast that exceeded actual market demand and resulted in excess inventory levels for certain high volume products.  No significant inventory charges were recorded in fiscal year 2014 for excess and obsolete inventory.
	Inventories were comprised of the following (in thousands):
		March 29,		March 30,
		2014		2013
	Work in process	$	37,967	$	34,169
	Finished goods		31,776		85,131
		$	69,743	$	119,300
	Property, Plant and Equipment, net
	Property, plant and equipment is recorded at cost, net of depreciation and amortization.  Depreciation and amortization is calculated on a straight-line basis over estimated economic lives, ranging from three to 39 years.  Leasehold improvements are depreciated over the shorter of the term of the lease or the estimated useful life.  Furniture, fixtures, machinery, and equipment are all depreciated over a useful life of three to 10 years, while buildings are depreciated over a period of up to 39 years.  In general, our capitalized software is amortized over a useful life of three years, with capitalized enterprise resource planning software being amortized over a useful life of 10 years.  Gains or losses related to retirements or dispositions of fixed assets are recognized in the period incurred.
	Property, plant and equipment was comprised of the following (in thousands):
		March 29,		March 30,
		2014		2013
	Land	$	23,806	$	23,778
	Buildings		37,899		38,257
	Furniture and fixtures		9,440		9,677
	Leasehold improvements		2,387		1,091
	Machinery and equipment		59,552		51,080
	Capitalized software		24,437		24,671
	Construction in progress		3,797		2,528
	Total property, plant and equipment		161,318		151,082
	Less: Accumulated depreciation and amortization		-57,668		-50,459
	Property, plant and equipment, net	$	103,650	$	100,623
	Depreciation and amortization expense on property, plant, and equipment for fiscal years 2014, 2013, and 2012, was $12.1 million, $10.2 million, and $6.3 million, respectively.
	Goodwill and Intangibles, net
	Intangible assets include purchased technology licenses and patents that are reported at cost and are amortized on a straight-line basis over their useful lives, generally ranging from one to ten years.  Acquired intangibles include existing technology, core technology or patents, license agreements, trademarks, tradenames, and customer relationships.  These assets are amortized on a straight-line basis over lives ranging from four to fifteen years.
	Goodwill is recorded at the time of an acquisition and is calculated as the difference between the aggregate consideration paid for an acquisition and the fair value of the net tangible and intangible assets acquired.  Goodwill and intangible assets deemed to have indefinite lives are not amortized but are subject to annual impairment tests.  If the assumptions and estimates used to allocate the purchase price are not correct, or if business conditions change, purchase price adjustments or future asset impairment charges could be required.  The value of our intangible assets, including goodwill, could be impacted by future adverse changes such as: (i) any future declines in our operating results, (ii) a decline in the valuation of technology company stocks, including the valuation of our common stock, (iii) a significant slowdown in the worldwide economy and the semiconductor industry, or (iv) any failure to meet the performance projections included in our forecasts of future operating results.  The Company tests goodwill and indefinite lived intangibles for impairment on an annual basis or more frequently if the Company believes indicators of impairment exist.  Impairment evaluations involve management’s assessment of qualitative factors to determine whether it is more likely than not that goodwill and other intangible assets are impaired.  If management concludes from its assessment of qualitative factors that it is more likely than not that impairment exists, then a quantitative impairment test will be performed involving management estimates of asset useful lives and future cash flows.  Significant management judgment is required in the forecasts of future operating results that are used in these evaluations.  If our actual results, or the plans and estimates used in future impairment analyses, are lower than the original estimates used to assess the recoverability of these assets, we could incur additional impairment charges in a future period.  There were no impairments of goodwill in fiscal years 2014, 2013 or 2012.  There were no material intangible asset impairments in fiscal years 2014, 2013 and 2012.
	Long-Lived Assets
	We test for impairment losses on long-lived assets and definite-lived intangibles used in operations when indicators of impairment are present and the undiscounted cash flows estimated to be generated by those assets are less than the assets’ carrying amounts.  We measure any impairment loss by comparing the fair value of the asset to its carrying amount.  We estimate fair value based on discounted future cash flows, quoted market prices, or independent appraisals.
	Foreign Currency Translation
	All of our international subsidiaries have the U.S. dollar as the functional currency.  The local currency financial statements are remeasured into U.S. dollars using current rates of exchange for assets and liabilities.  Gains and losses from remeasurement are included in other income (expense), net.  Revenue and expenses from our international subsidiaries are remeasured using the monthly average exchange rates in effect for the period in which the items occur.  For all periods presented, our foreign currency remeasurement expense was not significant.
	Concentration of Credit Risk
	Financial instruments that potentially subject us to material concentrations of credit risk consist primarily of cash equivalents, marketable securities, long-term marketable securities, and trade accounts receivable.  We are exposed to credit risk to the extent of the amounts recorded on the balance sheet.  By policy, our cash equivalents, marketable securities, and long-term marketable securities are subject to certain nationally recognized credit standards, issuer concentrations, sovereign risk, and marketability or liquidity considerations.
	In evaluating our trade receivables, we perform credit evaluations of our major customers’ financial condition and monitor closely all of our receivables to limit our financial exposure by limiting the length of time and amount of credit extended.  In certain situations, we may require payment in advance or utilize letters of credit to reduce credit risk.  By policy, we establish a reserve for trade accounts receivable based on the type of business in which a customer is engaged, the length of time a trade account receivable is outstanding, and other knowledge that we may possess relating to the probability that a trade receivable is at risk for non-payment.
	We had three contract manufacturers, Futaihua Industrial, Hongfujin Precision and Protek, who represented 14 percent, 44 percent, and 12 percent, respectively, for fiscal year 2014 and 21 percent, 36 percent, and 16 percent, respectively for fiscal year 2013,  of our consolidated gross accounts receivable.  Additionally, in fiscal year 2014, we had one distributor, Avnet, Inc. who represented 11 percent of our consolidated gross accounts receivable.  No other distributor or customer had receivable balances that represented more than 10 percent of consolidated gross trade accounts receivable as of the end of fiscal year 2014 or 2013.
	Since the components we produce are largely proprietary and generally not available from second sources, we consider our end customer to be the entity specifying the use of our component in their design.  These end customers may then purchase our products directly from us, from a distributor, or through a third party manufacturer contracted to produce their end product.  For fiscal years 2014, 2013, and 2012, our ten largest end customers represented approximately 88 percent, 89 percent, and 74 percent, of our sales, respectively.  For fiscal years 2014, 2013, and 2012, we had one end customer, Apple Inc., who purchased through multiple contract manufacturers and represented approximately 80 percent, 82 percent, and 62 percent, of the Company’s total sales, respectively.  Further, we had one distributor, Avnet, Inc., that represented 15 percent of our sales for fiscal year 2012.    No other customer or distributor represented more than 10 percent of net sales in fiscal years 2014, 2013, or 2012.
	Revenue Recognition
	We recognize revenue when all of the following criteria are met: persuasive evidence that an arrangement exists, delivery of goods has occurred, the sales price is fixed or determinable and collectability is reasonably assured.  We evaluate our distributor arrangements, on a distributor by distributor basis, with respect to each of the four criteria above.  For a majority of our distributor arrangements, we provide rights of price protection and stock rotation.  As a result, revenue is deferred at the time of shipment to our domestic distributors and certain international distributors due to the determination that the ultimate sales price to the distributor is not fixed or determinable.  Once the distributor has resold the product, and our final sales price is fixed or determinable, we recognize revenue for the final sales price and record the related costs of sales.  For certain of our smaller international distributors, we do not grant price protection rights and provide minimal stock rotation rights.  For these distributors, revenue is recognized upon delivery to the distributor, less an allowance for estimated returns, as the revenue recognition criteria have been met upon shipment.
	Further, for sales where revenue is deferred, the Company defers the associated cost of goods sold on our Consolidated Balance Sheet, net within the deferred income caption.  The Company routinely evaluates the products held by our distributors for impairment to the extent such products may be returned by the distributor within these limited rights and such products would be considered excess or obsolete if included within our own inventory.  Products returned by distributors and subsequently scrapped have historically been immaterial to the Company.
	Warranty Expense
	We warrant our products and maintain a provision for warranty repair or replacement of shipped products.  The accrual represents management’s estimate of probable returns.  Our estimate is based on an analysis of our overall sales volume and historical claims experience.  The estimate is re-evaluated periodically for accuracy.
	Shipping Costs
	Our shipping and handling costs are included in cost of sales for all periods presented in the Consolidated Statements of Comprehensive Income.
	Advertising Costs
	Advertising costs are expensed as incurred.  Advertising costs were $1.4 million, $1.5 million, and $1.8 million, in fiscal years 2014, 2013, and 2012, respectively.
	Stock-Based Compensation
	Stock-based compensation is measured at the grant date based on the grant-date fair value of the awards and is recognized as an expense, on a ratable basis, over the vesting period, which is generally between zero and four years.  Determining the amount of stock-based compensation to be recorded requires the Company to develop estimates used in calculating the grant-date fair value of stock options.  The Company calculates the grant-date fair value for stock options using the Black-Scholes valuation model.  The use of valuation models requires the Company to make estimates of assumptions such as expected volatility, expected term, risk-free interest rate, expected dividend yield, and forfeiture rates.  The grant-date fair value of restricted stock units is the market value at grant date multiplied by the number of units.
	Income Taxes
	We provide for the recognition of deferred tax assets if realization of such assets is more likely than not.  The Company evaluates the ability to realize its deferred tax assets based on all the facts and circumstances, including projections of future taxable income and expiration dates of carryover attributes on a quarterly basis.  We have provided a valuation allowance against a portion of our net U.S. deferred tax assets due to uncertainties regarding its realization.  The calculation of our tax liabilities involves assessing uncertainties with respect to the application of complex tax rules and the potential for future adjustment of our uncertain tax positions by the Internal Revenue Service or other taxing jurisdiction.  We recognize liabilities for uncertain tax positions based on the two-step process.  The first step requires us to determine if the weight of available evidence indicates that the tax position has met the threshold for recognition; therefore, we must evaluate whether it is more likely than not that the position will be sustained on audit, including resolution of any related appeals or litigation processes.  The second step requires us to measure the tax benefit of the tax position taken, or expected to be taken, in an income tax return as the largest amount that is more than 50 percent likely of being realized upon ultimate settlement.  We reevaluate the uncertain tax positions each quarter based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, expirations of statutes of limitation, effectively settled issues under audit, and new audit activity.  If our estimates of these taxes are greater or less than actual results, an additional tax benefit or charge will result.
	Although we believe the measurement of our liabilities for uncertain tax positions is reasonable, we cannot assure that the final outcome of these matters will not be different than what is reflected in the historical income tax provisions and accruals.  If additional taxes are assessed as a result of an audit or litigation, it could have a material effect on our income tax provision and net income in the period or periods for which that determination is made.  We operate within multiple taxing jurisdictions and are subject to audit in these jurisdictions.  These audits can involve complex issues which may require an extended period of time to resolve and could result in additional assessments of income tax.  We believe adequate provisions for income taxes have been made for all periods.
	Net Income Per Share
	Basic net income per share is based on the weighted effect of common shares issued and outstanding and is calculated by dividing net income by the basic weighted average shares outstanding during the period.  Diluted net income per share is calculated by dividing net income by the weighted average number of common shares used in the basic net income per share calculation, plus the equivalent number of common shares that would be issued assuming exercise or conversion of all potentially dilutive common shares outstanding.  These potentially dilutive items consist primarily of outstanding stock options and restricted stock grants.
	The following table details the calculation of basic and diluted earnings per share for fiscal years 2014, 2013, and 2012 (in thousands, except per share amounts):
		2014		2013		2012
	Numerator:
	Net income	$	108,111	$	136,598	$	87,983
Denominator:
Weighted average shares outstanding		62,926		64,580		64,934
Effect of dilutive securities		2,609		3,874		3,129
Weighted average diluted shares		65,535		68,454		68,063
Basic earnings per share	$	1.72	$	2.12	$	1.35
Diluted earnings per share	$	1.65	$	2.00	$	1.29
The weighted outstanding options excluded from our diluted calculation for the years ended March 29, 2014, March 30, 2013, and March 31, 2012, were 833 thousand,  453 thousand,  and 1,052 thousand, respectively, as the exercise price exceeded the average market price during the period.
Accumulated Other Comprehensive Loss
Our accumulated other comprehensive loss is comprised of foreign currency translation adjustments from prior years when we had subsidiaries whose functional currency was not the U.S. Dollar, as well as unrealized gains and losses on investments classified as available-for-sale.  See Note 16 – Accumulated Other Comprehensive loss for additional discussion.

Marketable_Securities

Marketable Securities	12 Months Ended
	Mar. 29, 2014
Marketable Securities [Abstract]	'
Marketable Securities	'
	3.      Marketable Securities
	The Company’s investments that have original maturities greater than 90 days have been classified as available-for-sale securities in accordance with U.S. GAAP.  Marketable securities are categorized on the Consolidated Balance Sheet as marketable securities, as appropriate.
	The following table is a summary of available-for-sale securities (in thousands):
											Estimated
					Gross			Gross			Fair Value
		Amortized			Unrealized			Unrealized			(Net Carrying
	As of March 29, 2014	Cost			Gains			Losses			Amount)
	Corporate debt securities	$	246,878		$	52		$	-245		$	246,685
	U.S. Treasury securities		56,986			10			-2			56,994
	Agency discount notes		2,008			1			-			2,009
	Commercial paper		41,962			10			-2			41,970
	Certificates of deposit		5,006			-			-4			5,002
	Total securities	$	352,840		$	73		$	-253		$	352,660
	The Company’s specifically identified gross unrealized losses of $253 thousand relates to 74 different securities with a total amortized cost of approximately $207.8 million at March 29, 2014. Because the Company does not intend to sell the investments at a loss and the Company will not be required to sell the investments before recovery of its amortized cost basis, it did not consider the investment in these securities to be other-than-temporarily impaired at March 29, 2014.  Further, the securities with gross unrealized losses had been in a continuous unrealized loss position for less than 12 months as of March 29, 2014.
											Estimated
					Gross			Gross			Fair Value
		Amortized			Unrealized			Unrealized			(Net Carrying
	As of March 30, 2013	Cost			Gains			Losses			Amount)
	Corporate debt securities	$	94,798		$	2		$	-133		$	94,667
	U.S. Treasury securities		34,380			4			-3			34,381
	Agency discount notes		1,027			-			-			1,027
	Commercial paper		40,089			9			-28			40,070
	Total securities	$	170,294		$	15		$	-164		$	170,145
	The Company’s specifically identified gross unrealized losses of  $164 thousand relates to 43 different securities with a total amortized cost of approximately $124.1 million at March 30, 2013.  Because the Company does not intend to sell the investments at a loss and the Company will not be required to sell the investments before recovery of its amortized cost basis, it did not consider the investment in these securities to be other-than-temporarily impaired at March 30, 2013.  Further, the securities with gross unrealized losses had been in a continuous unrealized loss position for less than 12 months as of March 30, 2013.
	The cost and estimated fair value of available-for-sale investments by contractual maturity were as follows:
			29-Mar-14						30-Mar-13
			Amortized			Estimated			Amortized			Estimated
			Cost			Fair Value			Cost			Fair Value
	Within 1 year		$	263,418		$	263,417		$	105,290		$	105,235
	After 1 year			89,422			89,243			65,004			64,910
	Total		$	352,840		$	352,660		$	170,294		$	170,145

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments	12 Months Ended
	Mar. 29, 2014
Fair Value of Financial Instruments [Abstract]	'
Fair Value of Financial Instruments	'
	4.      Fair Value of Financial Instruments
	The Company has determined that the only assets and liabilities in the Company’s financial statements that are required to be measured at fair value on a recurring basis are the Company’s investment portfolio assets. The Company defines fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.  The Company applies the following fair value 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. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements).
		•		Level 1 — Quoted prices in active markets for identical assets or liabilities.
		•		Level 2 — Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
		•		Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
	The Company’s investment portfolio assets consist of corporate debt securities, money market funds, U.S. Treasury securities, obligations of U.S. government-sponsored enterprises, commercial paper, and certificates of deposit and are reflected on our Consolidated Balance Sheet under the headings cash and cash equivalents, marketable securities, and long-term marketable securities.  The Company determines the fair value of its investment portfolio assets by obtaining non-binding market prices from its third-party portfolio managers on the last day of the quarter, whose sources may use quoted prices in active markets for identical assets (Level 1 inputs) or inputs other than quoted prices that are observable either directly or indirectly (Level 2 inputs) in determining fair value.
	As of March 29, 2014 and March 30, 2013, the Company classified all investment portfolio assets as Level 1 or Level 2 assets.  The Company has no Level 3 assets.  There were no transfers between Level 1, Level 2, or Level 3 measurements for the years ending March 29, 2014 and March 30, 2013.
	The fair value of our financial assets at March 29, 2014, was determined using the following inputs (in thousands):
		Quoted Prices
		in Active			Significant
		Markets for			Other		Significant
		Identical			Observable		Unobservable
		Assets			Inputs		Inputs
		Level 1			Level 2		Level 3		Total
	Cash equivalents
	Money market funds	$	20,456		$	-	$	-	$	20,456
	Commercial paper		-			1,878		-		1,878
		$	20,456		$	1,878	$	-	$	22,334
	Available-for-sale securities
	Corporate debt securities	$	-		$	246,685	$	-	$	246,685
	U.S. Treasury securities		56,994			-		-		56,994
	Agency discount notes		-			2,009		-		2,009
	Commercial paper		-			41,970		-		41,970
	Certificates of deposit		-			5,002		-		5,002
		$	56,994		$	295,666	$	-	$	352,660
	The fair value of our financial assets at March 30, 2013, was determined using the following inputs (in thousands):
		Quoted Prices
		in Active			Significant
		Markets for			Other		Significant
		Identical			Observable		Unobservable
		Assets			Inputs		Inputs
		Level 1			Level 2		Level 3		Total
	Cash equivalents
	Money market funds	$	54,762		$	-	$	-	$	54,762
	Commercial paper		-			1,500		-		1,500
		$	54,762		$	1,500	$	-	$	56,262
	Available-for-sale securities
	Corporate debt securities	$	-		$	94,667	$	-	$	94,667
	U.S. Treasury securities		34,381			-		-		34,381
	Agency discount notes		-			1,027		-		1,027
	Commercial paper		-			40,070		-		40,070
		$	34,381		$	135,764	$	-	$	170,145

Accounts_Receivable_Net

Accounts Receivable, Net	12 Months Ended
	Mar. 29, 2014
Accounts Receivable, Net [Abstract]	'
Accounts Receivable, Net	'
	5.      Accounts Receivable, net
	The following are the components of accounts receivable, net (in thousands):
		March 29,		March 30,
		2014		2013
	Gross accounts receivable	$	63,449	$	69,590
	Allowance for doubtful accounts		-229		-301
	Accounts receivable, net	$	63,220	$	69,289
	The following table summarizes the changes in the allowance for doubtful accounts (in thousands):
	Balance, March 26, 2011	$	-421
	Bad debt expense, net of recoveries		50
	Balance, March 31, 2012		-371
	Bad debt expense, net of recoveries		70
	Balance, March 30, 2013		-301
	Bad debt expense, net of recoveries		72
	Balance, March 29, 2014	$	-229

Goodwill_and_Intangibles_Net

Goodwill and Intangibles, Net	12 Months Ended
	Mar. 29, 2014
Goodwill and Intangibles, Net [Abstract]	'
Goodwill and Intangibles, Net	'
	6.      Goodwill and Intangibles, net
	The goodwill balance included on the Consolidated Balance Sheets under the caption “Goodwill and intangibles, net” is $16.4 million and $6.0 million at March 29, 2014 and March 30, 2013, respectively.  The increase in the goodwill and intangibles balances resulted from the acquisition discussed below in Note 7 - Acquisition.
	The following information details the gross carrying amount and accumulated amortization of our intangible assets (in thousands):
			29-Mar-14					30-Mar-13
	Intangible Category (Weighted-Average Amortization period (years))		Gross Amount			Accumulated Amortization		Gross Amount		Accumulated Amortization
	Core technology (a)	$	1,390		$	-1,390	$	1,390	$	-1,390
	License agreement (a)		440			-440		440		-440
	Existing technology (10.1)		9,826			-4,206		5,566		-3,802
	Trademarks and tradename (b)		1,600			-384		320		-320
	Customer relationships (10.0)		2,400			-120		-		-
	Technology licenses (3.2)		18,000			-15,117		16,303		-13,417
	Total	$	33,656		$	-21,657	$	24,019	$	-19,369
		(a)		Intangible assets are fully amortized.
		(b)		Trademark assets are fully amortized.  The tradename is being amortized over a period of ten years.
	Amortization expense for intangibles in fiscal years 2014, 2013, and 2012 was $2.8 million, $3.4 million, and $3.7 million, respectively.  The following table details the estimated aggregate amortization expense for all intangibles owned as of March 29, 2014, for each of the five succeeding fiscal years (in thousands):
	For the year ended March 28, 2015	$	3,443
	For the year ended March 26, 2016	$	2,295
	For the year ended March 25, 2017	$	1,101
	For the year ended March 31, 2018	$	794
	For the year ended March 30, 2019	$	794

Acquisition

Acquisition	12 Months Ended
	Mar. 29, 2014
Business Combinations [Abstract]	'
Business Combination Disclosure [Text Block]	'
	7.     Acquisition
	On October 1, 2013, the Company acquired 100 percent of the outstanding equity of Acoustic Technologies, Inc. (“Acoustic”), a privately held company.  The Mesa, Ariz.,-based firm is a leader in embedded firmware voice processing technology, including noise reduction, echo cancelation and voice enhancement.  This strategic acquisition enhances the Company’s technology and software expertise in our portable audio applications.
	The Company acquired Acoustic for approximately $20.4 million, net of cash obtained, and recorded the purchase using the acquisition method of accounting.  This method allows for the recognition of the assets acquired and liabilities assumed at their fair values as of the acquisition date.  The Consolidated Statements of Comprehensive Income presented include Acoustic’s results of operations beginning on the date of the acquisition.  Pro forma information related to this acquisition has not been presented because it would not be materially different from amounts reported.
	Goodwill was recorded in relation to the acquisition, as the purchase price was in excess of the fair value of the net assets acquired.  None of the goodwill is tax-deductible.  The final purchase price was allocated as follows (in thousands):
	Goodwill and Net Assets Acquired		Amount
	Cash and cash equivalents	$	120
	Accounts receivable		775
	Other current assets		2
	Property and equipment		175
	Intangible assets		7,940
	Goodwill		10,340
	Deferred tax asset - long-term		1,440
	Other non-current assets		36
	Current liabilities		-276
	Total purchase price	$	20,552
	The acquired intangible assets and related weighted average amortization periods are detailed below (in thousands):
	Intangible assets		Amount	Weighted-average Amortization Period (years)
	Technology	$	4,260	10
	Tradename		1,280	10
	Customer relationships		2,400	10
	Total	$	7,940

Asset_Sale

Asset Sale	12 Months Ended
	Mar. 29, 2014
Asset Sale [Abstract]	'
Asset Sale	'
	8.     Asset Sale
	The Company entered into an agreement to sell certain assets associated with Apex Precision Power (“Apex”) products in Tucson, Arizona for $26.1 million.  On August 17, 2012, the Company closed the transaction under this agreement.  After closing the transaction, the Company maintained a high voltage / high power IC design team in Tucson.  See Note 10 – Restructuring Costs for information regarding the subsequent closure and relocation of the Tucson design center. The Company received $22.2 million in cash and has recorded a long-term note receivable for $3.9 million to be paid in its entirety by August 17, 2014.  The gain recorded on the sale was $0.2 million and is included on the Consolidated Statement of Comprehensive Income under the caption, “Restructuring and other, net.”

Revolving_Line_of_Credit

Revolving Line of Credit	12 Months Ended
	Mar. 29, 2014
Line of Credit [Abstract]	'
Revolving Line of Credit	'
	9.     Revolving Line of Credit
	The Company maintained a revolving credit agreement (the “Expired Credit Agreement”) with Wells Fargo Bank, National Association, as administrative agent and issuing lender, Barclays Bank, as syndication agent, Wells Fargo Securities, LLC and Barclays Capital, as joint lead arrangers and co-book managers until early fiscal year 2014.  The aggregate borrowing limit under the unsecured revolving credit facility was $100 million with a $15 million letter of credit sublimit and was intended to provide the Company with short-term borrowings for working capital and other general corporate purposes.  The interest rate payable was, at the Company's election, (i) a base rate plus the applicable margin, where the base rate is determined by reference to the highest of 1) the prime rate publicly announced by the administrative agent, 2) the federal funds rate plus 0.50%, and 3) LIBOR for a one month period plus the difference between the applicable margin for LIBOR rate loans and the applicable margin for base rate loans, or (ii) the LIBOR rate plus the applicable margin that varies according to the leverage ratio of the Company.  Certain representations and warranties were required under the Expired Credit Agreement, and the Company must have been in compliance with specified financial covenants, including (i) the requirement that the Company maintain a ratio of consolidated funded indebtedness to consolidated EBITDA of not greater than 1.75 to 1.0, computed in accordance with the terms of the Expired Credit Agreement, and (ii) a minimum ratio of consolidated EBITDA to consolidated interest expense of not less than 3.50 to 1.0.  The Company was in compliance with these covenants during the period.  The Company had no outstanding amounts under the facility as of March 29, 2014 and March 30, 2013, and there were no borrowings under the facility prior to its expiration on April 19, 2013.  See Note 20 – Subsequent Event for details on new revolving line of credit.

Restructuring_Costs

Restructuring Costs	12 Months Ended
	Mar. 29, 2014
Restructuring Costs [Abstract]	'
Restructuring Costs	'
	10.      Restructuring Costs
	In the third quarter of fiscal year 2013, the Company committed to a plan to close its Tucson, Arizona design center and move those operations to the Company’s headquarters in Austin, Texas.  As a result, the Company incurred a one-time charge for relocation, severance-related items and facility-related costs to operating expenses totaling $3.5 million in the third quarter of fiscal year 2013. The charge included $1.5 million in severance and relocation-related costs and $2.0 million in facility and other related charges.  In fiscal year 2014, the Company recorded a credit of approximately $0.6 million related to changes in estimates for the facility, due to new subleases on the vacated property. This information is presented in a separate line item on the Consolidated Statements of Comprehensive Income in operating expenses under the caption “Restructuring and other, net.”
	Of the net $2.9 million expense incurred, approximately $2.5 million has been completed, and consisted of severance and relocation-related costs of approximately $1.1 million, an asset impairment charge of approximately $1.0 million, and facility-related costs of approximately $0.4 million.  As of March 29, 2014, we have a remaining restructuring accrual of $0.4 million, included in “Other accrued liabilities” on the Consolidated Balance Sheet.

Employee_Benefit_Plans

Employee Benefit Plans	12 Months Ended
	Mar. 29, 2014
Employee Benefit Plans [Abstract]	'
Employee Benefit Plans	'
	11.      Employee Benefit Plans
	We have a 401(k) Profit Sharing Plan (the “401(k) Plan”) covering all of our qualifying domestic employees.  Under the 401(k) Plan, employees may elect to contribute any percentage of their annual compensation up to the annual IRS limitations.  Beginning in the fourth quarter of fiscal year 2014, the Company matches 50 percent of the first 8 percent of the employees’ annual contribution; prior to the fourth quarter of the current fiscal year, the Company matched 50 percent of the first 6 percent of the employee’s annual contribution.  We made matching employee contributions of $1.8 million, $1.5 million, and $1.3 million during fiscal years 2014, 2013, and 2012, respectively.

Equity_Compensation

Equity Compensation	12 Months Ended
	Mar. 29, 2014
Equity Compensation [Abstract]	'
Equity Compensation	'
	12.      Equity Compensation
	The Company is currently granting equity awards from the 2006 Stock Incentive Plan (the “Plan”), which was approved by stockholders in July 2006.  The Plan provides for granting of stock options, restricted stock awards, performance awards, phantom stock awards, and bonus stock awards, or any combination of the foregoing.  To date, the Company has granted stock options, restricted stock awards, and phantom stock awards (also called restricted stock units) under the Plan.  Stock options generally vest between zero and four years, and are exercisable for a period of ten years from the date of grant.  Generally, restricted stock awards are subject to vesting schedules up to four years.  Restricted stock units are generally subject to vesting from one to three years, depending upon the terms of the grant.
	The following table summarizes the activity in total shares available for grant (in thousands):
			Shares
			Available for
			Grant
	Balance, March 26, 2011		8,175
	Plans terminated		-34
	Granted		-2,049
	Forfeited		165
	Balance, March 31, 2012		6,257
	Plans terminated		-
	Granted		-1,600
	Forfeited		468
	Balance, March 30, 2013		5,125
	Plans terminated		-
	Granted		-1,785
	Forfeited		207
	Balance, March 29, 2014		3,547
	Stock Compensation Expense
	The following table summarizes the effects of stock-based compensation on cost of goods sold, research and development, sales, general and administrative, pre-tax income, and net income after taxes for options granted under the Company’s equity incentive plans (in thousands, except per share amounts):
		Fiscal Years Ended
			29-Mar-14			30-Mar-13			31-Mar-12
	Cost of sales	$	864		$	751		$	398
	Research and development		10,392			10,549			5,590
	Sales, general and administrative		11,818			10,195			6,190
	Effect on pre-tax income		23,074			21,495			12,178
	Income Tax Benefit		-8,445			-106			-
	Total share-based compensation expense (net of taxes)		14,629			21,389			12,178
	Share-based compensation effects on basic earnings per share	$	0.50		$	0.33		$	0.19
	Share-based compensation effects on diluted earnings per share		0.48			0.32			0.18
	Share-based compensation effects on operating activities cash flow		14,629			21,389			12,178
	Share-based compensation effects on financing activities cash flow		8,445			106			-
	The total share based compensation expense included in the table above and which is attributable to restricted stock awards and restricted stock units was $18.6 million, $16.3 million, and $6.3 million, for fiscal years 2014, 2013, and 2012, respectively.
	As of March 29, 2014, there was $37.5 million of compensation costs related to non-vested stock options, restricted stock awards, and restricted stock units granted under the Company’s equity incentive plans not yet recognized in the Company’s financial statements.  The unrecognized compensation cost is expected to be recognized over a weighted average period of 1.21 years for stock options, 0.27 years for restricted stock awards, and 1.49 years for restricted stock units.
	Stock Option Awards
	We estimated the fair value of each stock option grant on the date of grant using the Black-Scholes option-pricing model using a dividend yield of zero and the following additional assumptions:
		Year Ended
			29-Mar-14					30-Mar-13			31-Mar-12
	Expected stock price volatility		51.93	-	54.34	%		63.42	%		59.25	-	66.11	%
	Risk-free interest rate		0.47	-	0.52	%		0.31	%		0.27	-	1.43	%
	Expected term (in years)		2.46	-	2.61			2.46			2.32	-	3.82
	The Black-Scholes valuation calculation requires us to estimate key assumptions such as stock price volatility, expected term, risk-free interest rate and dividend yield.  The expected stock price volatility is based upon implied volatility from traded options on our stock in the marketplace.  The expected term of options granted is derived from an analysis of historical exercises and remaining contractual life of stock options, and represents the period of time that options granted are expected to be outstanding after becoming vested.  The risk-free interest rate reflects the yield on zero-coupon U.S. Treasury securities for a period that is commensurate with the expected term assumption.  Finally, we have never paid cash dividends, do not currently intend to pay cash dividends, and thus have assumed a zero percent dividend yield.
	Using the Black-Scholes option valuation model, the weighted average estimated fair values of employee stock options granted in fiscal years 2014, 2013, and 2012, were $10.45,  $20.43, $7.58, respectively.
	During fiscal year 2014, 2013, and 2012, we received a net $5.1 million, $12.0 million, and $4.1 million, respectively, from the exercise of 0.8 million, 1.7 million, and 0.6 million, respectively, stock options granted under the Company’s Stock Plan.
	The total intrinsic value of stock options exercised during fiscal year 2014, 2013, and 2012, was $12.4 million, $48.6 million, and $7.6 million, respectively.  Intrinsic value represents the difference between the market value of the Company’s common stock at the time of exercise and the strike price of the stock option.
	As of March 29, 2014, approximately 7.3 million shares of common stock were reserved for issuance under the Company’s Stock Plan.
	Additional information with respect to stock option activity is as follows (in thousands, except per share amounts):
			Outstanding Options
						Weighted
						Average
			Number			Exercise Price
	Balance, March 26, 2011		6,181		$	7.63
	Options granted		450			15.63
	Options exercised		-593			6.88
	Options forfeited		-67			7.70
	Options expired		-67			15.68
	Balance, March 31, 2012		5,904		$	8.23
	Options granted		264			37.22
	Options exercised		-1,746			6.88
	Options forfeited		-144			12.52
	Options expired		-			20.25
	Balance, March 30, 2013		4,278		$	10.42
Options granted		318			23.45
Options exercised		-834			6.12
Options forfeited		-10			15.33
Options expired		-27			19.52
Balance, March 29, 2014		3,725		$	12.42
Additional information with regards to outstanding options that are vesting, expected to vest, or exercisable as of March 29, 2014 is as follows (in thousands, except years and per share amounts):
					Weighted		Weighted Average
		Number of			Average		Remaining Contractual			Aggregate
		Options			Exercise price		Term (years)			Intrinsic Value
Vested and expected to vest		3,676		$	12.24		5.68		$	32,674
Exercisable		3,004		$	9.54		5.07		$	31,823
In accordance with U.S. GAAP, stock options outstanding that are expected to vest are presented net of estimated future option forfeitures, which are estimated as compensation costs are recognized.  Options with a fair value of $4.8 million, $4.8 million, and $6.3 million, became vested during fiscal years 2014, 2013, and 2012, respectively.
The following table summarizes information regarding outstanding and exercisable options as of March 29, 2014 (in thousands, except per share amounts):
		Options Outstanding							Options Exercisable
				Weighted Average
				Remaining		Weighted					Weighted
				Contractual Life		Average Exercise			Number		Average
Range of Exercise Prices		Number		(years)		Price			Exercisable		Exercise Price
$2.82 - $5.53		502		4.03		$	5.16		502		$	5.16
$5.55 - $5.55		943		5.50			5.55		943			5.55
$5.66 - $7.87		701		3.21			7.27		701			7.27
$8.06 - $16.25		831		6.74			15.21		616			15.10
$16.28 - $24.14		499		8.30			22.03		154			19.46
$38.99 - $38.99		249		8.52			38.99		88			38.99
		3,725		5.72		$	12.42		3,004		$	9.54
As of March 29, 2014 and March 30, 2013, the number of options exercisable was 3.0 million and 3.2 million, respectively.
Restricted Stock Awards
The Company periodically grants restricted stock awards (“RSA’s”) to select employees.  The grant date for these awards is equal to the measurement date and the awards are valued as of the measurement date and amortized over the requisite vesting period, which is no more than four years.  Each full value award, including RSA’s, reduces the total shares available for grant under the Plan at a rate of 1.5 shares per RSA granted.  As of March 29, 2014, approximately 0.1 million shares attributable to RSA awards were reserved for issuance under the Plan, which includes the additional shares associated with this full value multiplier.  A summary of the activity for RSA’s in fiscal year 2014, 2013, and 2012, is presented below (in thousands, except per share amounts):
				Weighted
				Average
				Grant Date
	Number of			Fair Value
	Shares			(per share)
26-Mar-11	45		$	7.21
Granted	49			15.31
Vested	-54			14.57
Forfeited	-			-
31-Mar-12	40			7.19
Granted	27			28.24
Vested	-62			15.45
Forfeited	-			-
30-Mar-13	5			17.28
Granted	-			-
Vested	-			-
Forfeited	-			-
29-Mar-14	5		$	17.28
The aggregate intrinsic value of RSA’s outstanding as of March 29, 2014 was $98 thousand. RSA’s with a fair value of $951 thousand and $637 thousand became vested during fiscal years 2013 and 2012, respectively.    No RSA’s became vested during fiscal year 2014.
Restricted Stock Units
Commencing in fiscal year 2011, the Company began granting restricted stock units (“RSU’s”) to select employees. These awards are valued as of the grant date and amortized over the requisite vesting period.  Generally, RSU’s vest 100 percent on the first to third anniversary of the grant date depending on the vesting specifications.  Each full value award, including RSU’s, reduces the total shares available for grant under the 2006 option plan at a rate of 1.5 shares per RSU granted.  As of March 29, 2014, approximately 3.9 million shares attributable to RSU awards were reserved for issuance under the Plan, which includes the additional shares associated with this full value award multiplier. A summary of the activity for RSU’s in fiscal year 2014, 2013, and 2012 is presented below (in thousands, except year and per share amounts):
				Weighted
				Average
	Shares			Fair Value
26-Mar-11	620		$	16.41
Granted	1,017			16.59
Vested	-			-
Forfeited	-21			16.04
31-Mar-12	1,616			16.52
Granted	864			37.26
Vested	-193			20.56
Forfeited	-216			21.46
30-Mar-13	2,071			23.66
Granted	977			22.55
Vested	-626			17.71
Forfeited	-113			25.81
29-Mar-14	2,309		$	25.26
The aggregate intrinsic value of RSU’s outstanding as of March 29, 2014 was $45.1 million. Additional information with regards to outstanding restricted stock units that are vesting or expected to vest as of March 29, 2014, is as follows (in thousands, except year and per share amounts):
					Weighted		Weighted Average
					Average		Remaining Contractual
		Shares			Fair Value		Term (years)
Vested and expected to vest		2,174		$	25.26		1.46
RSU’s outstanding that are expected to vest are presented net of estimated future forfeitures, which are estimated as compensation costs are recognized.  RSU’s with a fair value of $11.1 million and $3.8 million became vested during fiscal years 2014 and 2013, respectively.  No RSU’s became vested during fiscal year 2012. The majority of RSUs that vested in 2014 and 2013 were net settled such that the Company withheld a portion of the shares at fair value to satisfy tax withholding requirements. In fiscal years 2014 and 2013, the vesting of RSU’s reduced the authorized and unissued share balance by approximately 0.6 million and 0.2 million, respectively. Total shares withheld and subsequently retired out of the Plan were approximately 0.2 million and 0.1 million, and total payments for the employees’ tax obligations to taxing authorities were $3.9 million and $1.7 million for fiscal years 2014 and 2013, respectively. A portion of RSUs that vested in fiscal year 2014 were cash settled such that the Company received cash from employees in lieu of withholding shares to satisfy tax withholding requirements. The total amount received from cash settled shares during fiscal year 2014 was $0.2 million.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Mar. 29, 2014
Commitments and Contingencies [Abstract]	'
Commitments and Contingencies	'
	13.      Commitments and Contingencies
	Facilities and Equipment Under Operating Lease Agreements
	With the exception of our corporate headquarters and select surrounding properties, we lease our facilities and certain equipment under operating lease agreements, some of which have renewal options.  Certain of these arrangements provide for lease payment increases based upon future fair market rates.  As of May 1, 2014, our principal facilities are located in Austin, Texas.
	The Company closed operations in Tucson, Arizona during fiscal year 2013, which included 28,000 square feet of leased office space which was primarily occupied by engineering personnel.  The term of this lease extends through May 2015.
	The aggregate minimum future rental commitments under all operating leases, net of sublease income, for the following fiscal years are (in thousands):
			Facilities		Subleases		Net Facilities Commitments		Equipment Commitments		Total Commitments
	2015	$	3,292	$	238	$	3,054	$	11	$	3,065
	2016		2,623		27		2,596		8		2,604
	2017		2,519		-		2,519		5		2,524
	2018		823		-		823		5		828
	2019		373		-		373		4		377
	Thereafter		-		-		-		-		-
	Total minimum lease payment	$	9,630	$	265	$	9,365	$	33	$	9,398
	Total rent expense was approximately $2.8 million, $3.2 million, and $4.7 million, for fiscal years 2014, 2013, and 2012, respectively.  Sublease rental income was $0.1 million, $0.1 million, $0.4 million, for fiscal years 2014, 2013, and 2012, respectively.
	Wafer, Assembly and Test Purchase Commitments
	We rely primarily on third-party foundries for our wafer manufacturing needs.  As of March 29, 2014, we had agreements with multiple foundries for the manufacture of wafers.  On December 22, 2011, the Company entered into a $10 million Capacity Investment and Loading Agreement with STATS ChipPAC Ltd (Supplier Agreement) in order to secure assembly and test capacity for certain products.  As part of the agreement, we are eligible to receive rebates on our purchases up to the full amount of the specified $10 million in the Supplier Agreement upon our meeting certain purchase volume milestones.  We have utilized $2.6 million and $4.3 million during fiscal years 2014 and 2013, respectively, related to the agreement and expect to receive the full amount of our $10 million payments back in rebates through fiscal year 2015, based on our current projections.  Other than the previously mentioned agreement, our foundry agreements do not have volume purchase commitments or "take or pay" clauses and provide for purchase commitments based on purchase orders.  Cancellation fees or other charges may apply and are generally dependent upon whether wafers have been started or the stage of the manufacturing process at which the notice of cancellation is given.  As of March 29, 2014, we had foundry commitments of $36.7 million.
	In addition to our wafer supply arrangements, we contract with third-party assembly vendors to package the wafer die into finished products.  Assembly vendors provide fixed-cost-per-unit pricing, as is common in the semiconductor industry.  We had non-cancelable assembly purchase orders with numerous vendors totaling $2.1 million at March 29, 2014.
	Test vendors provide fixed-cost-per-unit pricing, as is common in the semiconductor industry.  Our total non-cancelable commitment for outside test services as of March 29, 2014 was $5.3 million.

Legal_Matters

Legal Matters	12 Months Ended
	Mar. 29, 2014
Legal Matters [Abstract]	'
Legal Matters	'
	14.      Legal Matters
	From time to time, we are involved in legal proceedings concerning matters arising in connection with the conduct of our business activities.  We regularly evaluate the status of legal proceedings in which we are involved to assess whether a loss is probable or there is a reasonable possibility that a loss or additional loss may have been incurred and to determine if accruals are appropriate.  We further evaluate each legal proceeding to assess whether an estimate of possible loss or range of loss can be made.
	On June 4, 2012, U.S. Ethernet Innovations, LLC (the “Plaintiff”) filed suit against Cirrus Logic and two other defendants in the U.S. District Court, Eastern District of Texas.  The Plaintiff alleges that Cirrus Logic infringed four U.S. patents relating to Ethernet technology.  In its complaint, the Plaintiff indicated that it is seeking unspecified monetary damages, including up to treble damages for willful infringement.  We answered the complaint on June 29, 2012, denying the allegations of infringement and seeking a declaratory judgment that the patents in suit were invalid and not infringed.  The parties entered into a settlement agreement on May 30, 2013. In exchange for a full release of claims as it relates to the asserted patent, we paid the Plaintiff $0.7 million. This amount is recorded as a separate line item on the Consolidated Statements of Comprehensive Income under the caption “Patent infringement settlements, net.”
	On February 4, 2013, a purported shareholder filed a class action complaint in the U.S. District Court, Southern District of New York against the Company and two  of the Company’s executives (the “Securities Case”).  Koplyay v. Cirrus Logic, Inc., et al. Civil Action No. 13-CV-0790.  The complaint alleges that the defendants violated the federal securities laws by making materially false and misleading statements regarding our business results between July 31, 2012, and October 31, 2012, and seeks unspecified damages along with plaintiff’s costs and expenses, including attorneys’ fees.  A second complaint was filed on April 13, 2013, by a different purported shareholder, in the same court, setting forth substantially the same allegations.  On April 19, 2013, the court appointed the plaintiff and counsel in the first class action complaint as the lead plaintiff and lead counsel.  The lead plaintiff filed an amended complaint on May 1, 2013, including substantially the same allegations as the original complaint.  On May 24, 2013, the Company filed a motion to dismiss the amended complaint for failure to state a claim.  On December 2, 2013, the court granted the Company’s motion and dismissed the case with prejudice.  The plaintiff did not appeal the court’s order and the case has concluded.
	On April 13, 2013, another purported shareholder filed a shareholder derivative complaint against several of our current officers and directors in the District Court of Travis County, Texas, 53rd Judicial District (the “Derivative Case”).  Graham, derivatively on behalf of Cirrus Logic, Inc. v. Rhode, et. al., Cause No. D-1-GN-13-001285.  In this complaint, the plaintiff makes allegations similar to those presented in the Securities Case, but the plaintiff asserts various state law causes of action, including claims of breach of fiduciary duty and unjust enrichment.  On January 27, 2014, the plaintiff filed a Notice of Non-Suit (the “Notice”) indicating that the plaintiff did not intend to pursue the claims further.  Based on the plaintiff’s filing of the Notice, the Court dismissed the plaintiff’s claims without prejudice.

Stockholders_Equity

Stockholder's Equity	12 Months Ended
	Mar. 29, 2014
Stockholder's Equity [Abstract]	'
Stockholder's Equity	'
	15.      Stockholders’ Equity
	Share Repurchase Program
	On November 20, 2012, we announced that our Board of Directors authorized a share repurchase program of up to $200 million of the Company’s common stock.  As of March 29, 2014, the Company had repurchased 5.6 million shares at a cost of approximately $137.7 million, or an average cost of $24.46 per share. Of this total, 2.6 million shares were purchased in the current fiscal year at a cost of $52.1 million, or an average cost of $19.78 per share. As of March 29, 2014, approximately $62.3 million remains available for repurchase under this plan.
	In fiscal year 2013, the Company repurchased 3.0 million shares at a cost of $86.1 million, or an average cost of $28.59 per share. This amount included $0.5 million of stock repurchased pursuant to the remaining portion of the $80 million share repurchase program authorized by the Board of Directors in November 2010.
	All of these shares were repurchased in the open market and were funded from existing cash.  All shares of our common stock that were repurchased were retired as of March 29, 2014.
	Preferred Stock
	We have 5.0 million shares of Preferred Stock authorized.  As of March 29, 2014 we have not issued any of the authorized shares.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	12 Months Ended
	Mar. 29, 2014
Accumulated Other Comprehensive Loss [Abstract]	'
Accumulated Other Comprehensive Loss Text Block	'
	16.      Accumulated Other Comprehensive Loss
	Our accumulated other comprehensive loss is comprised of foreign currency translation adjustments and unrealized gains and losses on investments classified as available-for-sale.  The foreign currency translation adjustments are not currently adjusted for income taxes because they relate to indefinite investments in non-U.S. subsidiaries that have since changed from a foreign functional currency to a U.S dollar functional currency.
	The following table summarizes the changes in the components of accumulated other comprehensive loss, net of tax (in thousands):
					Unrealized Gains
			Foreign		(Losses) on
			Currency		Securities		Total
	Balance, March 31, 2012	$	-770	$	8	$	-762
	Current period activity		-		-157		-157
	Tax effect		-		-		-
	Balance, March 30, 2013		-770		-149		-919
	Current period activity		-		-31		-31
	Tax effect		-		64		64
	Balance, March 29, 2014	$	-770	$	-116	$	-886

Income_Taxes

Income Taxes	12 Months Ended
	Mar. 29, 2014
Income Taxes [Abstract]	'
Income Taxes	'
	17.      Income Taxes
	Income before income taxes consisted of (in thousands):
		Year Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	United States	$	155,431	$	200,124	$	79,425
	Non-U.S.		306		1,066		558
		$	155,737	$	201,190	$	79,983
	The provision (benefit) for income taxes consists of (in thousands):
		Year Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	Current:
	Federal	$	10,550	$	3,537	$	1,322
	State		258		323		518
	Non-U.S.		335		243		261
	Total current tax provision	$	11,143	$	4,103	$	2,101
	Deferred:
	U.S.		36,543		60,506		-10,102
	Non-U.S.		-60		-17		1
	Total deferred tax provision (benefit)		36,483		60,489		-10,101
	Total tax provision (benefit)	$	47,626	$	64,592	$	-8,000
	The effective income tax rates differ from the rates computed by applying the statutory federal rate to pretax income as follows (in percentages):
		Year Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	Expected income tax provision at the U.S. federal statutory rate		35.0		35.0		35.0
	Valuation allowance changes affecting the provision of income taxes		-0.1		-1.3		-46.7
	Foreign taxes at different rates		0.1		-0.1		-
	R&D credit		-0.9		-2.1		-
	Stock compensation		-0.1		0.1		1.0
	Recognition of prior year benefit		-4.1		-		-
	Nondeductible expenses		0.5		0.3		0.1
	Other		0.2		0.2		0.6
	Provision (benefit) for income taxes		30.6		32.1		-10
	Significant components of our deferred tax assets and liabilities as of March 29, 2014 and March 30, 2013 are (in thousands):
		March 29,		March 30,
		2014		2013
	Deferred tax assets:
	Inventory valuation	$	7,692	$	12,065
	Accrued expenses and allowances		3,905		5,077
	Net operating loss carryforwards		29,062		28,162
	Research and development tax credit carryforwards		15,164		37,054
	State tax credit carryforwards		231		237
	Capitalized research and development		3,485		6,601
	Other		28,627		21,505
	Total deferred tax assets	$	88,166	$	110,701
	Valuation allowance for deferred tax assets		-32,159		-23,232
	Net deferred tax assets	$	56,007	$	87,469
	Deferred tax liabilities:
	Depreciation and amortization	$	5,709	$	5,238
	Acquisition intangibles		3,209		623
	Total deferred tax liabilities	$	8,918	$	5,861
	Total net deferred tax assets	$	47,089	$	81,608
	These net deferred tax assets have been categorized on the Consolidated Balance Sheets as of March 29, 2014 and March 30, 2013 as follows:
		March 29,		March 30,
		2014		2013
	Current deferred tax assets	$	22,024	$	64,937
	Long-term deferred tax assets		25,065		16,671
	Total net deferred tax assets	$	47,089	$	81,608
	The current and long-term deferred tax assets are disclosed separately under their respective captions on the Consolidated Balance Sheets.
	The valuation allowance increased by $8.9 million in fiscal year 2014 and decreased by $5.8 million in fiscal year 2013.  The increase during fiscal year 2014 was primarily due to the equity acquisition of Acoustic, which had a large Federal net operating loss that will not be fully realized due to the limitations of Internal Revenue Code Section 382.  The Company maintained its valuation allowance on various state net operating losses and credits due to the likelihood that they will expire or go unutilized because the Company no longer has a significant apportionment in the jurisdiction in which the attribute was created.  The decrease in the fiscal year 2013 allowance was the result of a release of valuation allowance that the Company had maintained on its capital loss carryforward due to the capital gain income generated by the sale of assets associated with the Company’s Apex products.  With regard to the remaining deferred tax assets, Management believes that the Company’s results from future operations will generate sufficient taxable income such that it is more likely than not that these deferred tax assets will be realized.
	At March 29, 2014, we had federal net operating loss carryforwards of $81.3 million.  Of that amount, $29.5 million related to acquired companies and are, therefore, subject to certain limitations under Section 382 of the Internal Revenue Code.  Because the Company has elected the “with and without” method for purposes of tracking its excess stock deductions, the amount of federal net operating loss included in deferred tax assets is $61.2 million, which yields a tax effected deferred tax asset of $21.4 million.  The net deferred tax asset for federal net operating loss carryforwards is $8.8 million after taking into account the valuation allowance that has been placed on this deferred tax asset.  The Company had $110.0 million of excess stock deductions which are not included in deferred tax assets.  The tax benefit from these deductions will increase additional paid-in capital when they are deemed realized under the “with and without” method.  We had net operating losses in various states that total $94.0 million. The federal net operating loss carryforwards expire in fiscal years 2019 through 2034.  The state net operating loss carryforwards expire in fiscal years 2015 through 2029.  We also have non-U.S. net operating losses of $2.2 million, which do not expire.
Federal research and development credit carryforwards of $21.0 million expire in fiscal years 2018 through 2034.  Under the “with and without method”, all but $612 thousand of these credit carryforwards are deemed to have been utilized in fiscal year 2014 and are therefore, not reflected as deferred tax assets at the end of the fiscal year.  Of the $14.5 million of state research and development credits,  $2.8 million will expire in fiscal years 2022 through 2027.  The remaining $11.7 million of state research and development credits are not subject to expiration.
We have approximately $307 thousand of cumulative undistributed earnings in certain non-U.S. subsidiaries.  We have not recognized a deferred tax liability on these undistributed earnings because the Company currently intends to reinvest these earnings in operations outside the U.S.  The unrecognized deferred tax liability on these earnings is approximately $109 thousand.
We record unrecognized tax benefits for the estimated risk associated with tax positions taken on tax returns.  The unrecognized tax benefits balance was zero at March 29, 2014 and March 30, 2013.
The Company does not believe that its unrecognized tax benefits will significantly increase or decrease during the next 12 months.
We accrue interest and penalties related to unrecognized tax benefits as a component of the provision for income taxes.  As of March 29, 2014, the balance of accrued interest and penalties was zero.  No interest or penalties were incurred during fiscal year 2014 or 2013.
The Company and its subsidiaries are subject to U.S. federal income tax as well as income tax in multiple state and foreign jurisdictions.  Fiscal years 2011 through 2014 remain open to examination by the major taxing jurisdictions to which we are subject.

Segment_Information

Segment Information	12 Months Ended
	Mar. 29, 2014
Segment Information [Abstract]	'
Segment Information	'
	18.      Segment Information
	We determine our operating segments in accordance with Financial Accounting Standards Board (“FASB”) guidelines.  Our Chief Executive Officer (“CEO”) has been identified as the chief operating decision maker under these guidelines.
	The Company operates and tracks its results in one reportable segment, but reports revenue performance in two product lines, which currently are audio and energy.  Our CEO receives and uses enterprise-wide financial information to assess financial performance and allocate resources, rather than detailed information at a product line level.  Additionally, our product lines have similar characteristics and customers.  They share operations support functions such as sales, public relations, supply chain management, various research and development and engineering support, in addition to the general and administrative functions of human resources, legal, finance and information technology.  Therefore, there is no complete, discrete financial information maintained for these product lines.  Revenue from our product lines are as follows (in thousands):
		Fiscal Years Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	Audio Products	$	667,739	$	754,769	$	350,743
	Energy Products		46,599		55,017		76,100
		$	714,338	$	809,786	$	426,843
	Geographic Area
	The following illustrates sales by geographic locations based on the sales office location (in thousands):
		Fiscal Years Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	United States	$	35,582	$	38,670	$	50,230
	European Union		13,125		17,601		23,493
	United Kingdom		1,513		1,610		434
	China		617,850		700,051		294,143
	Hong Kong		6,057		8,590		8,671
	Japan		5,150		9,299		15,196
	South Korea		9,338		8,975		9,781
	Taiwan		13,739		11,694		10,662
	Other Asia		11,112		10,387		13,063
	Other non-U.S. countries		872		2,909		1,170
	Total consolidated sales	$	714,338	$	809,786	$	426,843
	The following illustrates property, plant and equipment, net, by geographic locations, based on physical location (in thousands):
		Fiscal Years Ended
		March 29,		March 30,
		2014		2013
	United States	$	103,287	$	100,343
	United Kingdom		16		23
	China		265		137
	Hong Kong		2		5
	Japan		12		25
	South Korea		5		6
	Taiwan		52		70
	Other Asia		11		14
	Total consolidated property, plant and equipment, net	$	103,650	$	100,623

Quarterly_Results_Unaudited

Quarterly Results (Unaudited)	12 Months Ended
	Mar. 29, 2014
Quarterly Results (Unaudited) [Abstract]	'
Quarterly Results (Unaudited)	'
	19.      Quarterly Results (Unaudited)
	The following quarterly results have been derived from our audited annual consolidated financial statements.  In the opinion of management, this unaudited quarterly information has been prepared on the same basis as the annual consolidated financial statements and includes all adjustments, including normal recurring adjustments, necessary for a fair presentation of this quarterly information.  This information should be read along with the financial statements and related notes.  The operating results for any quarter are not necessarily indicative of results to be expected for any future period.
	The unaudited quarterly statement of operations data for each quarter of fiscal years 2014 and 2013 were as follows (in thousands, except per share data):
		Fiscal Year 2014
		1st		2nd		3rd		4th
		Quarter		Quarter		Quarter		Quarter
	Net sales	$	155,125	$	190,671	$	218,883	$	149,659
	Gross profit		79,498		99,448		103,849		73,368
	Net income		20,642		33,367		41,500		12,602
	Basic income per share	$	0.33	$	0.53	$	0.66	$	0.20
	Diluted income per share		0.31		0.50		0.63		0.20
		Fiscal Year 2013
		1st		2nd		3rd		4th
		Quarter		Quarter		Quarter		Quarter
	Net sales	$	99,006	$	193,774	$	310,133	$	206,873
	Gross profit		53,440		100,087		158,050		83,614
	Net income		6,927		35,449		67,862		26,360
	Basic income per share	$	0.11	$	0.55	$	1.04	$	0.41
	Diluted income per share		0.10		0.51		0.99		0.39

Subsequent_Event

Subsequent Event	12 Months Ended
	Mar. 29, 2014
Subsequent Event [Abstract]	'
Subsequent Events [Text Block]	'
	20.      Subsequent Event
	On April 29, 2014, Cirrus Logic announced that Cirrus Logic and board of directors of Wolfson Microelectronics plc, a public limited company incorporated in Scotland (“Wolfson”), had agreed on the terms of a recommended cash offer of £2.35 per share (the “Offer”) to be made by Cirrus Logic for the acquisition of the entire issued and to be issued share capital of Wolfson (the “Acquisition”).  The Offer values the entire issued and to be issued share capital of Wolfson at approximately £291 million (approximately $488 million based on a U.S. dollar to pound sterling exchange rate of 1.68) (the “Offer Consideration”), and implies an enterprise value of Wolfson of approximately £278 million (approximately $467 million based on a U.S. dollar to pound sterling exchange rate of 1.68).   As a result of this agreement, we entered into a nine-month foreign currency hedging contract, which is expected to mitigate the risks of foreign currency fluctuation related to this transaction.  The Acquisition, if approved, is expected to strengthen Cirrus Logic’s ability to expand its customer base with highly differentiated, end-to-end audio solutions for portable audio applications.  The Acquisition will be financed by a combination of existing cash on Cirrus Logic’s balance sheet and $225 million in debt funding from Wells Fargo Bank, National Association.  The Acquisition is expected to close in the second half of calendar year 2014.
	Cirrus Logic entered into a credit agreement (the “Credit Agreement”) with Wells Fargo Bank, National Association as administrative agent and lender, on April 29, 2014, in connection with the Acquisition.  The Credit Agreement provides for a $225 million senior secured revolving credit facility (the “Credit Facility”).  The Credit Facility may be used for, among other things, payment of the Offer Consideration in connection with the deal.  The Credit Facility matures on the earliest to occur of (a) January 23, 2015, (b) the date of termination of the Commitments as a result of a permanent reduction of all of the Commitments (as defined therein) by Cirrus Logic or (c) the date of termination of the Commitments as a result of an event of default (such date, the “Maturity Date”).  Cirrus Logic must repay the outstanding principal amount of all borrowings, together with all accrued but unpaid interest thereon, on the Maturity Date.  The Credit Facility is required to be guaranteed by all of Cirrus Logic’s material domestic subsidiaries (the “Subsidiary Guarantors”).  The Credit Facility is secured by substantially all of the assets of Cirrus Logic and any Subsidiary Guarantors, except for certain excluded assets.
	Borrowings under the Credit Facility may, at our election, bear interest at either (a) a base rate plus the applicable margin (“Base Rate Loans”) or (b) a LIBOR rate plus the applicable margin (“LIBOR Rate Loans”).  The applicable margin ranges from 0% to .25% per annum for Base Rate Loans and 1.75% to 2.25% per annum for LIBOR Rate Loans based on the Leverage Ratio (as defined below).  A Commitment Fee accrues at a rate per annum ranging from 0.30% to 0.40% (based on the Leverage Ratio) on the average daily unused portion of the Commitment of the Lenders. Certain representations and warranties are required under the Credit Agreement, and the Company must be in compliance with specified financial covenants, including the ratio of consolidated funded indebtedness to consolidated EBITDA for the prior four consecutive quarters must not be greater than 1.75 to 1.00 (the “Leverage Ratio”) and the sum of cash and cash equivalents of Cirrus Logic and its subsidiaries on a consolidated basis must not be less than $75 million.

Description_of_Business_Policy

Description of Business (Policy)	12 Months Ended
	Mar. 29, 2014
Description of Business [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	We prepare financial statements on a 52- or 53-week year that ends on the last Saturday in March.  Fiscal years 2014 and 2013 were 52-week years, whereas fiscal year 2012 was a 53-week year.
Principles of Consolidation	'
	Principles of Consolidation
	The accompanying consolidated financial statements have been prepared in accordance with U. S. generally accepted accounting principles (U.S. GAAP) and include the accounts of the Company and its wholly-owned subsidiaries.  All significant intercompany balances and transactions have been eliminated.
Reclassifications	'
	Reclassifications
	Certain reclassifications have been made to prior year balances in order to conform to the current year’s presentation of financial information.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in accordance with U.S. GAAP requires the use of management estimates.  These estimates are subjective in nature and involve judgments that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at fiscal year-end and the reported amounts of revenue and expenses during the reporting period.  Actual results could differ from these estimates.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policy)	12 Months Ended
	Mar. 29, 2014
Summary of Significant Accounting Policies [Abstract]	'
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	Cash and cash equivalents consist primarily of money market funds, commercial paper, and U.S. Government Treasury and Agency instruments with original maturities of three months or less at the date of purchase
Marketable Securities	'
	Marketable Securities
	We determine the appropriate classification of marketable securities at the time of purchase and reevaluate this designation as of each balance sheet date.  We classify these securities as either held-to-maturity, trading, or available-for-sale.  As of March 29, 2014 and March 30, 2013, all marketable securities were classified as available-for-sale securities.  The Company classifies its investments as “available for sale” because it expects to possibly sell some securities prior to maturity.  The Company’s investments are subject to market risk, primarily interest rate and credit risk.  The Company’s investments are managed by an outside professional manager within investment guidelines set by the Company.  Such guidelines include security type, credit quality, and maturity, and are intended to limit market risk by restricting the Company’s investments to high quality debt instruments with relatively short-term maturities.  The fair value of investments is determined using observable or quoted market prices for those securities.
	Available-for-sale securities are carried at fair value, with unrealized gains and losses included as a component of accumulated other comprehensive loss.  Realized gains and losses, declines in value judged to be other than temporary, and interest on available-for-sale securities are included in net income.  The cost of securities sold is based on the specific identification method.
Inventories	'
	Inventories
	We use the lower of cost or market method to value our inventories, with cost being determined on a first-in, first-out basis.  One of the factors we consistently evaluate in the application of this method is the extent to which products are accepted into the marketplace.  By policy, we evaluate market acceptance based on known business factors and conditions by comparing forecasted customer unit demand for our products over a specific future period, or demand horizon, to quantities on hand at the end of each accounting period.
	On a quarterly and annual basis, we analyze inventories on a part-by-part basis.  Product life cycles and the competitive nature of the industry are factors considered in the evaluation of customer unit demand at the end of each quarterly accounting period.  Inventory quantities on-hand in excess of forecasted demand is considered to have reduced market value and, therefore, the cost basis is adjusted to the lower of cost or market.  Typically, market values for excess or obsolete inventories are considered to be zero.  During fiscal year 2013, the Company recorded excess and obsolete inventory charges of $25.5 million, primarily associated with a customer build forecast that exceeded actual market demand and resulted in excess inventory levels for certain high volume products.  No significant inventory charges were recorded in fiscal year 2014 for excess and obsolete inventory.
	Inventories were comprised of the following (in thousands):
		March 29,		March 30,
		2014		2013
	Work in process	$	37,967	$	34,169
	Finished goods		31,776		85,131
		$	69,743	$	119,300
Property, Plant and Equipment, Net	'
	Property, Plant and Equipment, net
	Property, plant and equipment is recorded at cost, net of depreciation and amortization.  Depreciation and amortization is calculated on a straight-line basis over estimated economic lives, ranging from three to 39 years.  Leasehold improvements are depreciated over the shorter of the term of the lease or the estimated useful life.  Furniture, fixtures, machinery, and equipment are all depreciated over a useful life of three to 10 years, while buildings are depreciated over a period of up to 39 years.  In general, our capitalized software is amortized over a useful life of three years, with capitalized enterprise resource planning software being amortized over a useful life of 10 years.  Gains or losses related to retirements or dispositions of fixed assets are recognized in the period incurred.
	Property, plant and equipment was comprised of the following (in thousands):
		March 29,		March 30,
		2014		2013
	Land	$	23,806	$	23,778
	Buildings		37,899		38,257
	Furniture and fixtures		9,440		9,677
	Leasehold improvements		2,387		1,091
	Machinery and equipment		59,552		51,080
	Capitalized software		24,437		24,671
	Construction in progress		3,797		2,528
	Total property, plant and equipment		161,318		151,082
	Less: Accumulated depreciation and amortization		-57,668		-50,459
	Property, plant and equipment, net	$	103,650	$	100,623
	Depreciation and amortization expense on property, plant, and equipment for fiscal years 2014, 2013, and 2012, was $12.1 million, $10.2 million, and $6.3 million, respectively.
Goodwill and Intangibles, Net	'
	Goodwill and Intangibles, net
	Intangible assets include purchased technology licenses and patents that are reported at cost and are amortized on a straight-line basis over their useful lives, generally ranging from one to ten years.  Acquired intangibles include existing technology, core technology or patents, license agreements, trademarks, tradenames, and customer relationships.  These assets are amortized on a straight-line basis over lives ranging from four to fifteen years.
	Goodwill is recorded at the time of an acquisition and is calculated as the difference between the aggregate consideration paid for an acquisition and the fair value of the net tangible and intangible assets acquired.  Goodwill and intangible assets deemed to have indefinite lives are not amortized but are subject to annual impairment tests.  If the assumptions and estimates used to allocate the purchase price are not correct, or if business conditions change, purchase price adjustments or future asset impairment charges could be required.  The value of our intangible assets, including goodwill, could be impacted by future adverse changes such as: (i) any future declines in our operating results, (ii) a decline in the valuation of technology company stocks, including the valuation of our common stock, (iii) a significant slowdown in the worldwide economy and the semiconductor industry, or (iv) any failure to meet the performance projections included in our forecasts of future operating results.  The Company tests goodwill and indefinite lived intangibles for impairment on an annual basis or more frequently if the Company believes indicators of impairment exist.  Impairment evaluations involve management’s assessment of qualitative factors to determine whether it is more likely than not that goodwill and other intangible assets are impaired.  If management concludes from its assessment of qualitative factors that it is more likely than not that impairment exists, then a quantitative impairment test will be performed involving management estimates of asset useful lives and future cash flows.  Significant management judgment is required in the forecasts of future operating results that are used in these evaluations.  If our actual results, or the plans and estimates used in future impairment analyses, are lower than the original estimates used to assess the recoverability of these assets, we could incur additional impairment charges in a future period.  There were no impairments of goodwill in fiscal years 2014, 2013 or 2012.  There were no material intangible asset impairments in fiscal years 2014, 2013 and 2012.
Long-Lived Assets	'
	Long-Lived Assets
	We test for impairment losses on long-lived assets and definite-lived intangibles used in operations when indicators of impairment are present and the undiscounted cash flows estimated to be generated by those assets are less than the assets’ carrying amounts.  We measure any impairment loss by comparing the fair value of the asset to its carrying amount.  We estimate fair value based on discounted future cash flows, quoted market prices, or independent appraisals.
Foreign Currency Translation	'
	Foreign Currency Translation
	All of our international subsidiaries have the U.S. dollar as the functional currency.  The local currency financial statements are remeasured into U.S. dollars using current rates of exchange for assets and liabilities.  Gains and losses from remeasurement are included in other income (expense), net.  Revenue and expenses from our international subsidiaries are remeasured using the monthly average exchange rates in effect for the period in which the items occur.  For all periods presented, our foreign currency remeasurement expense was not significant.
Concentration of Credit Risk	'
	Concentration of Credit Risk
	Financial instruments that potentially subject us to material concentrations of credit risk consist primarily of cash equivalents, marketable securities, long-term marketable securities, and trade accounts receivable.  We are exposed to credit risk to the extent of the amounts recorded on the balance sheet.  By policy, our cash equivalents, marketable securities, and long-term marketable securities are subject to certain nationally recognized credit standards, issuer concentrations, sovereign risk, and marketability or liquidity considerations.
	In evaluating our trade receivables, we perform credit evaluations of our major customers’ financial condition and monitor closely all of our receivables to limit our financial exposure by limiting the length of time and amount of credit extended.  In certain situations, we may require payment in advance or utilize letters of credit to reduce credit risk.  By policy, we establish a reserve for trade accounts receivable based on the type of business in which a customer is engaged, the length of time a trade account receivable is outstanding, and other knowledge that we may possess relating to the probability that a trade receivable is at risk for non-payment.
	We had three contract manufacturers, Futaihua Industrial, Hongfujin Precision and Protek, who represented 14 percent, 44 percent, and 12 percent, respectively, for fiscal year 2014 and 21 percent, 36 percent, and 16 percent, respectively for fiscal year 2013,  of our consolidated gross accounts receivable.  Additionally, in fiscal year 2014, we had one distributor, Avnet, Inc. who represented 11 percent of our consolidated gross accounts receivable.  No other distributor or customer had receivable balances that represented more than 10 percent of consolidated gross trade accounts receivable as of the end of fiscal year 2014 or 2013.
	Since the components we produce are largely proprietary and generally not available from second sources, we consider our end customer to be the entity specifying the use of our component in their design.  These end customers may then purchase our products directly from us, from a distributor, or through a third party manufacturer contracted to produce their end product.  For fiscal years 2014, 2013, and 2012, our ten largest end customers represented approximately 88 percent, 89 percent, and 74 percent, of our sales, respectively.  For fiscal years 2014, 2013, and 2012, we had one end customer, Apple Inc., who purchased through multiple contract manufacturers and represented approximately 80 percent, 82 percent, and 62 percent, of the Company’s total sales, respectively.  Further, we had one distributor, Avnet, Inc., that represented 15 percent of our sales for fiscal year 2012.    No other customer or distributor represented more than 10 percent of net sales in fiscal years 2014, 2013, or 2012.
Revenue Recognition	'
	Revenue Recognition
	We recognize revenue when all of the following criteria are met: persuasive evidence that an arrangement exists, delivery of goods has occurred, the sales price is fixed or determinable and collectability is reasonably assured.  We evaluate our distributor arrangements, on a distributor by distributor basis, with respect to each of the four criteria above.  For a majority of our distributor arrangements, we provide rights of price protection and stock rotation.  As a result, revenue is deferred at the time of shipment to our domestic distributors and certain international distributors due to the determination that the ultimate sales price to the distributor is not fixed or determinable.  Once the distributor has resold the product, and our final sales price is fixed or determinable, we recognize revenue for the final sales price and record the related costs of sales.  For certain of our smaller international distributors, we do not grant price protection rights and provide minimal stock rotation rights.  For these distributors, revenue is recognized upon delivery to the distributor, less an allowance for estimated returns, as the revenue recognition criteria have been met upon shipment.
	Further, for sales where revenue is deferred, the Company defers the associated cost of goods sold on our Consolidated Balance Sheet, net within the deferred income caption.  The Company routinely evaluates the products held by our distributors for impairment to the extent such products may be returned by the distributor within these limited rights and such products would be considered excess or obsolete if included within our own inventory.  Products returned by distributors and subsequently scrapped have historically been immaterial to the Company.
Warranty Expense	'
	Warranty Expense
	We warrant our products and maintain a provision for warranty repair or replacement of shipped products.  The accrual represents management’s estimate of probable returns.  Our estimate is based on an analysis of our overall sales volume and historical claims experience.  The estimate is re-evaluated periodically for accuracy.
Shipping Costs	'
	Shipping Costs
	Our shipping and handling costs are included in cost of sales for all periods presented in the Consolidated Statements of Comprehensive Income.
Advertising Costs	'
	Advertising Costs
	Advertising costs are expensed as incurred.  Advertising costs were $1.4 million, $1.5 million, and $1.8 million, in fiscal years 2014, 2013, and 2012, respectively.
Stock-Based Compensation	'
	Stock-Based Compensation
	Stock-based compensation is measured at the grant date based on the grant-date fair value of the awards and is recognized as an expense, on a ratable basis, over the vesting period, which is generally between zero and four years.  Determining the amount of stock-based compensation to be recorded requires the Company to develop estimates used in calculating the grant-date fair value of stock options.  The Company calculates the grant-date fair value for stock options using the Black-Scholes valuation model.  The use of valuation models requires the Company to make estimates of assumptions such as expected volatility, expected term, risk-free interest rate, expected dividend yield, and forfeiture rates.  The grant-date fair value of restricted stock units is the market value at grant date multiplied by the number of units.
Income Taxes	'
	Income Taxes
	We provide for the recognition of deferred tax assets if realization of such assets is more likely than not.  The Company evaluates the ability to realize its deferred tax assets based on all the facts and circumstances, including projections of future taxable income and expiration dates of carryover attributes on a quarterly basis.  We have provided a valuation allowance against a portion of our net U.S. deferred tax assets due to uncertainties regarding its realization.  The calculation of our tax liabilities involves assessing uncertainties with respect to the application of complex tax rules and the potential for future adjustment of our uncertain tax positions by the Internal Revenue Service or other taxing jurisdiction.  We recognize liabilities for uncertain tax positions based on the two-step process.  The first step requires us to determine if the weight of available evidence indicates that the tax position has met the threshold for recognition; therefore, we must evaluate whether it is more likely than not that the position will be sustained on audit, including resolution of any related appeals or litigation processes.  The second step requires us to measure the tax benefit of the tax position taken, or expected to be taken, in an income tax return as the largest amount that is more than 50 percent likely of being realized upon ultimate settlement.  We reevaluate the uncertain tax positions each quarter based on factors including, but not limited to, changes in facts or circumstances, changes in tax law, expirations of statutes of limitation, effectively settled issues under audit, and new audit activity.  If our estimates of these taxes are greater or less than actual results, an additional tax benefit or charge will result.
	Although we believe the measurement of our liabilities for uncertain tax positions is reasonable, we cannot assure that the final outcome of these matters will not be different than what is reflected in the historical income tax provisions and accruals.  If additional taxes are assessed as a result of an audit or litigation, it could have a material effect on our income tax provision and net income in the period or periods for which that determination is made.  We operate within multiple taxing jurisdictions and are subject to audit in these jurisdictions.  These audits can involve complex issues which may require an extended period of time to resolve and could result in additional assessments of income tax.  We believe adequate provisions for income taxes have been made for all periods.
Net Income Per Share	'
	Net Income Per Share
	Basic net income per share is based on the weighted effect of common shares issued and outstanding and is calculated by dividing net income by the basic weighted average shares outstanding during the period.  Diluted net income per share is calculated by dividing net income by the weighted average number of common shares used in the basic net income per share calculation, plus the equivalent number of common shares that would be issued assuming exercise or conversion of all potentially dilutive common shares outstanding.  These potentially dilutive items consist primarily of outstanding stock options and restricted stock grants.
	The following table details the calculation of basic and diluted earnings per share for fiscal years 2014, 2013, and 2012 (in thousands, except per share amounts):
		2014		2013		2012
	Numerator:
	Net income	$	108,111	$	136,598	$	87,983
	Denominator:
	Weighted average shares outstanding		62,926		64,580		64,934
	Effect of dilutive securities		2,609		3,874		3,129
	Weighted average diluted shares		65,535		68,454		68,063
	Basic earnings per share	$	1.72	$	2.12	$	1.35
	Diluted earnings per share	$	1.65	$	2.00	$	1.29
	The weighted outstanding options excluded from our diluted calculation for the years ended March 29, 2014, March 30, 2013, and March 31, 2012, were 833 thousand,  453 thousand,  and 1,052 thousand, respectively, as the exercise price exceeded the average market price during the period.
Accumulated Other Comprehensive Loss	'
	Accumulated Other Comprehensive Loss
	Our accumulated other comprehensive loss is comprised of foreign currency translation adjustments from prior years when we had subsidiaries whose functional currency was not the U.S. Dollar, as well as unrealized gains and losses on investments classified as available-for-sale.  See Note 16 – Accumulated Other Comprehensive loss for additional discussion.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Mar. 29, 2014
Summary of Significant Accounting Policies [Abstract]	'
Schedule of Inventories	'
		March 29,		March 30,
		2014		2013
	Work in process	$	37,967	$	34,169
	Finished goods		31,776		85,131
		$	69,743	$	119,300
Components of Property, Plant and Equipment	'
		March 29,		March 30,
		2014		2013
	Land	$	23,806	$	23,778
	Buildings		37,899		38,257
	Furniture and fixtures		9,440		9,677
	Leasehold improvements		2,387		1,091
	Machinery and equipment		59,552		51,080
	Capitalized software		24,437		24,671
	Construction in progress		3,797		2,528
	Total property, plant and equipment		161,318		151,082
	Less: Accumulated depreciation and amortization		-57,668		-50,459
	Property, plant and equipment, net	$	103,650	$	100,623
Schedule of Earnings Per Share, Basic and Diluted	'
		2014		2013		2012
	Numerator:
	Net income	$	108,111	$	136,598	$	87,983
	Denominator:
	Weighted average shares outstanding		62,926		64,580		64,934
	Effect of dilutive securities		2,609		3,874		3,129
	Weighted average diluted shares		65,535		68,454		68,063
	Basic earnings per share	$	1.72	$	2.12	$	1.35
	Diluted earnings per share	$	1.65	$	2.00	$	1.29

Marketable_Securities_Tables

Marketable Securities (Tables)	12 Months Ended
	Mar. 29, 2014													Mar. 30, 2013
Marketable Securities [Abstract]	'													'
Schedule of Available-for-sale Securities	'													'
											Estimated										Estimated
					Gross			Gross			Fair Value						Gross		Gross		Fair Value
		Amortized			Unrealized			Unrealized			(Net Carrying				Amortized		Unrealized		Unrealized		(Net Carrying
	As of March 29, 2014	Cost			Gains			Losses			Amount)			As of March 30, 2013	Cost		Gains		Losses		Amount)
	Corporate debt securities	$	246,878		$	52		$	-245		$	246,685		Corporate debt securities	$	94,798	$	2	$	-133	$	94,667
	U.S. Treasury securities		56,986			10			-2			56,994		U.S. Treasury securities		34,380		4		-3		34,381
	Agency discount notes		2,008			1			-			2,009		Agency discount notes		1,027		-		-		1,027
	Commercial paper		41,962			10			-2			41,970		Commercial paper		40,089		9		-28		40,070
	Certificates of deposit		5,006			-			-4			5,002		Total securities	$	170,294	$	15	$	-164	$	170,145
	Total securities	$	352,840		$	73		$	-253		$	352,660
Schedule of Cost and Estimated Fair Value of Available-for-sale Securities by Contractual Maturity	'													'
			29-Mar-14						30-Mar-13
			Amortized			Estimated			Amortized			Estimated
			Cost			Fair Value			Cost			Fair Value
	Within 1 year		$	263,418		$	263,417		$	105,290		$	105,235
	After 1 year			89,422			89,243			65,004			64,910
	Total		$	352,840		$	352,660		$	170,294		$	170,145

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	12 Months Ended
	Mar. 29, 2014									Mar. 30, 2013
Fair Value of Financial Instruments [Abstract]	'									'
Schedule of Fair Value of Financial Assets	'									'
		Quoted Prices									Quoted Prices
		in Active		Significant							in Active		Significant
		Markets for		Other		Significant					Markets for		Other		Significant
		Identical		Observable		Unobservable					Identical		Observable		Unobservable
		Assets		Inputs		Inputs					Assets		Inputs		Inputs
		Level 1		Level 2		Level 3		Total			Level 1		Level 2		Level 3		Total
	Cash equivalents									Cash equivalents
	Money market funds	$	20,456	$	-	$	-	$	20,456	Money market funds	$	54,762	$	-	$	-	$	54,762
	Commercial paper		-		1,878		-		1,878	Commercial paper		-		1,500		-		1,500
		$	20,456	$	1,878	$	-	$	22,334		$	54,762	$	1,500	$	-	$	56,262
	Available-for-sale securities									Available-for-sale securities
	Corporate debt securities	$	-	$	246,685	$	-	$	246,685	Corporate debt securities	$	-	$	94,667	$	-	$	94,667
	U.S. Treasury securities		56,994		-		-		56,994	U.S. Treasury securities		34,381		-		-		34,381
	Agency discount notes		-		2,009		-		2,009	Agency discount notes		-		1,027		-		1,027
	Commercial paper		-		41,970		-		41,970	Commercial paper		-		40,070		-		40,070
	Certificates of deposit		-		5,002		-		5,002		$	34,381	$	135,764	$	-	$	170,145
		$	56,994	$	295,666	$	-	$	352,660

Accounts_Receivable_Net_Tables

Accounts Receivable, Net (Tables)	12 Months Ended
	Mar. 29, 2014
Accounts Receivable, Net [Abstract]	'
Components of Accounts Receivable, Net	'
		March 29,		March 30,
		2014		2013
	Gross accounts receivable	$	63,449	$	69,590
	Allowance for doubtful accounts		-229		-301
	Accounts receivable, net	$	63,220	$	69,289
Changes in the Allowance for Doubtful Accounts	'
	Balance, March 26, 2011	$	-421
	Bad debt expense, net of recoveries		50
	Balance, March 31, 2012		-371
	Bad debt expense, net of recoveries		70
	Balance, March 30, 2013		-301
	Bad debt expense, net of recoveries		72
	Balance, March 29, 2014	$	-229

Goodwill_and_Intangibles_Net_T

Goodwill and Intangibles, Net (Tables)	12 Months Ended
	Mar. 29, 2014
Goodwill and Intangibles, Net [Abstract]	'
Schedule of Gross Carrying Amount and Amortization of Intangible Assets	'
			29-Mar-14				30-Mar-13
	Intangible Category (Weighted-Average Amortization period (years))		Gross Amount		Accumulated Amortization		Gross Amount		Accumulated Amortization
	Core technology (a)	$	1,390	$	-1,390	$	1,390	$	-1,390
	License agreement (a)		440		-440		440		-440
	Existing technology (10.1)		9,826		-4,206		5,566		-3,802
	Trademarks and tradename (b)		1,600		-384		320		-320
	Customer relationships (10.0)		2,400		-120		-		-
	Technology licenses (3.2)		18,000		-15,117		16,303		-13,417
	Total	$	33,656	$	-21,657	$	24,019	$	-19,369
Schedule of Estimated Aggregate Amortization Expense for Intangibles	'
	For the year ended March 28, 2015	$	3,443
	For the year ended March 26, 2016	$	2,295
	For the year ended March 25, 2017	$	1,101
	For the year ended March 31, 2018	$	794
	For the year ended March 30, 2019	$	794

Acquisition_Tables

Acquisition (Tables)	12 Months Ended
	Mar. 29, 2014
Business Combinations [Abstract]	'
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	'
	Goodwill and Net Assets Acquired		Amount
	Cash and cash equivalents	$	120
	Accounts receivable		775
	Other current assets		2
	Property and equipment		175
	Intangible assets		7,940
	Goodwill		10,340
	Deferred tax asset - long-term		1,440
	Other non-current assets		36
	Current liabilities		-276
	Total purchase price	$	20,552
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	'
	Intangible assets		Amount	Weighted-average Amortization Period (years)
	Technology	$	4,260	10
	Tradename		1,280	10
	Customer relationships		2,400	10
	Total	$	7,940

Equity_Compensation_Tables

Equity Compensation (Tables)	12 Months Ended
	Mar. 29, 2014
Summary of Activity in Total Stock Available for Grant	'
			Shares
			Available for
			Grant
	Balance, March 26, 2011		8,175
	Plans terminated		-34
	Granted		-2,049
	Forfeited		165
	Balance, March 31, 2012		6,257
	Plans terminated		-
	Granted		-1,600
	Forfeited		468
	Balance, March 30, 2013		5,125
	Plans terminated		-
	Granted		-1,785
	Forfeited		207
	Balance, March 29, 2014		3,547
Summary of Effect of Stock-Based Compensation on Cost of Goods Sold	'
		Fiscal Years Ended
			29-Mar-14			30-Mar-13			31-Mar-12
	Cost of sales	$	864		$	751		$	398
	Research and development		10,392			10,549			5,590
	Sales, general and administrative		11,818			10,195			6,190
	Effect on pre-tax income		23,074			21,495			12,178
	Income Tax Benefit		-8,445			-106			-
	Total share-based compensation expense (net of taxes)		14,629			21,389			12,178
	Share-based compensation effects on basic earnings per share	$	0.50		$	0.33		$	0.19
	Share-based compensation effects on diluted earnings per share		0.48			0.32			0.18
	Share-based compensation effects on operating activities cash flow		14,629			21,389			12,178
	Share-based compensation effects on financing activities cash flow		8,445			106			-
Schedule of Fair Value of Stock Option Grants	'
		Year Ended
			29-Mar-14					30-Mar-13			31-Mar-12
	Expected stock price volatility		51.93	-	54.34	%		63.42	%		59.25	-	66.11	%
	Risk-free interest rate		0.47	-	0.52	%		0.31	%		0.27	-	1.43	%
	Expected term (in years)		2.46	-	2.61			2.46			2.32	-	3.82
Schedule of Stock Option Activity	'
			Outstanding Options
						Weighted
						Average
			Number			Exercise Price
	Balance, March 26, 2011		6,181		$	7.63
	Options granted		450			15.63
	Options exercised		-593			6.88
	Options forfeited		-67			7.70
	Options expired		-67			15.68
	Balance, March 31, 2012		5,904		$	8.23
	Options granted		264			37.22
	Options exercised		-1,746			6.88
	Options forfeited		-144			12.52
	Options expired		-			20.25
	Balance, March 30, 2013		4,278		$	10.42
	Options granted		318			23.45
	Options exercised		-834			6.12
	Options forfeited		-10			15.33
	Options expired		-27			19.52
	Balance, March 29, 2014		3,725		$	12.42
Summary of Outstanding Options Vesting, Expected to Vest, or Exercisable	'
						Weighted		Weighted Average
			Number of			Average		Remaining Contractual			Aggregate
			Options			Exercise price		Term (years)			Intrinsic Value
	Vested and expected to vest		3,676		$	12.24		5.68		$	32,674
	Exercisable		3,004		$	9.54		5.07		$	31,823
Summary of Outstanding and Exercisable Options	'
			Options Outstanding							Options Exercisable
					Weighted Average
					Remaining		Weighted					Weighted
					Contractual Life		Average Exercise			Number		Average
	Range of Exercise Prices		Number		(years)		Price			Exercisable		Exercise Price
	$2.82 - $5.53		502		4.03		$	5.16		502		$	5.16
	$5.55 - $5.55		943		5.50			5.55		943			5.55
	$5.66 - $7.87		701		3.21			7.27		701			7.27
	$8.06 - $16.25		831		6.74			15.21		616			15.10
	$16.28 - $24.14		499		8.30			22.03		154			19.46
	$38.99 - $38.99		249		8.52			38.99		88			38.99
			3,725		5.72		$	12.42		3,004		$	9.54
Summary of Restricted Stock Units Vesting or Expected to Vest	'
						Weighted		Weighted Average
						Average		Remaining Contractual
			Shares			Fair Value		Term (years)
	Vested and expected to vest		2,174		$	25.26		1.46
Restricted Stock Awards [Member]	'
Summary of Restricted Stock and Restricted Stock Units Activity	'
					Weighted
					Average
					Grant Date
		Number of			Fair Value
		Shares			(per share)
	26-Mar-11	45		$	7.21
	Granted	49			15.31
	Vested	-54			14.57
	Forfeited	-			-
	31-Mar-12	40			7.19
	Granted	27			28.24
	Vested	-62			15.45
	Forfeited	-			-
	30-Mar-13	5			17.28
	Granted	-			-
	Vested	-			-
	Forfeited	-			-
	29-Mar-14	5		$	17.28
Restricted Stock Units (RSUs) [Member]	'
Summary of Restricted Stock and Restricted Stock Units Activity	'
					Weighted
					Average
		Shares			Fair Value
	26-Mar-11	620		$	16.41
	Granted	1,017			16.59
	Vested	-			-
	Forfeited	-21			16.04
	31-Mar-12	1,616			16.52
	Granted	864			37.26
	Vested	-193			20.56
	Forfeited	-216			21.46
	30-Mar-13	2,071			23.66
	Granted	977			22.55
	Vested	-626			17.71
	Forfeited	-113			25.81
	29-Mar-14	2,309		$	25.26

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Mar. 29, 2014
Commitments and Contingencies [Abstract]	'
Schedule of Future Rental Commitments	'
			Facilities		Subleases		Net Facilities Commitments		Equipment Commitments		Total Commitments
	2015	$	3,292	$	238	$	3,054	$	11	$	3,065
	2016		2,623		27		2,596		8		2,604
	2017		2,519		-		2,519		5		2,524
	2018		823		-		823		5		828
	2019		373		-		373		4		377
	Thereafter		-		-		-		-		-
	Total minimum lease payment	$	9,630	$	265	$	9,365	$	33	$	9,398

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Mar. 29, 2014
Accumulated Other Comprehensive Loss [Abstract]	'
Summary of Changes in the Components of Accumulated Other Comprehensive Loss	'
					Unrealized Gains
			Foreign		(Losses) on
			Currency		Securities		Total
	Balance, March 31, 2012	$	-770	$	8	$	-762
	Current period activity		-		-157		-157
	Tax effect		-		-		-
	Balance, March 30, 2013		-770		-149		-919
	Current period activity		-		-31		-31
	Tax effect		-		64		64
	Balance, March 29, 2014	$	-770	$	-116	$	-886

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Mar. 29, 2014
Income Taxes [Abstract]	'
Summary of Income Before Income Taxes	'
		Year Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	United States	$	155,431	$	200,124	$	79,425
	Non-U.S.		306		1,066		558
		$	155,737	$	201,190	$	79,983
Summary of Provision (Benefit) for Income Taxes	'
		Year Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	Current:
	Federal	$	10,550	$	3,537	$	1,322
	State		258		323		518
	Non-U.S.		335		243		261
	Total current tax provision	$	11,143	$	4,103	$	2,101
	Deferred:
	U.S.		36,543		60,506		-10,102
	Non-U.S.		-60		-17		1
	Total deferred tax provision (benefit)		36,483		60,489		-10,101
	Total tax provision (benefit)	$	47,626	$	64,592	$	-8,000
Summary of Provision (Benefit) for Income Taxes, Statutory Federal Rate Pretax Income Reconciliation	'
		Year Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	Expected income tax provision at the U.S. federal statutory rate		35.0		35.0		35.0
	Valuation allowance changes affecting the provision of income taxes		-0.1		-1.3		-46.7
	Foreign taxes at different rates		0.1		-0.1		-
	R&D credit		-0.9		-2.1		-
	Stock compensation		-0.1		0.1		1.0
	Recognition of prior year benefit		-4.1		-		-
	Nondeductible expenses		0.5		0.3		0.1
	Other		0.2		0.2		0.6
	Provision (benefit) for income taxes		30.6		32.1		-10
Significant Components of Deferred Tax Assets and Liabilities	'
		March 29,		March 30,
		2014		2013
	Deferred tax assets:
	Inventory valuation	$	7,692	$	12,065
	Accrued expenses and allowances		3,905		5,077
	Net operating loss carryforwards		29,062		28,162
	Research and development tax credit carryforwards		15,164		37,054
	State tax credit carryforwards		231		237
	Capitalized research and development		3,485		6,601
	Other		28,627		21,505
	Total deferred tax assets	$	88,166	$	110,701
	Valuation allowance for deferred tax assets		-32,159		-23,232
	Net deferred tax assets	$	56,007	$	87,469
	Deferred tax liabilities:
	Depreciation and amortization	$	5,709	$	5,238
	Acquisition intangibles		3,209		623
	Total deferred tax liabilities	$	8,918	$	5,861
	Total net deferred tax assets	$	47,089	$	81,608
Summary of Deferred Tax Assets	'
		March 29,		March 30,
		2014		2013
	Current deferred tax assets	$	22,024	$	64,937
	Long-term deferred tax assets		25,065		16,671
	Total net deferred tax assets	$	47,089	$	81,608

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Mar. 29, 2014
Segment Information [Abstract]	'
Schedule of Segment Revenue from Product Lines	'
		Fiscal Years Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	Audio Products	$	667,739	$	754,769	$	350,743
	Energy Products		46,599		55,017		76,100
		$	714,338	$	809,786	$	426,843
Schedule of Sales by Geographic Location Based on the Sales Office Location	'
		Fiscal Years Ended
		March 29,		March 30,		March 31,
		2014		2013		2012
	United States	$	35,582	$	38,670	$	50,230
	European Union		13,125		17,601		23,493
	United Kingdom		1,513		1,610		434
	China		617,850		700,051		294,143
	Hong Kong		6,057		8,590		8,671
	Japan		5,150		9,299		15,196
	South Korea		9,338		8,975		9,781
	Taiwan		13,739		11,694		10,662
	Other Asia		11,112		10,387		13,063
	Other non-U.S. countries		872		2,909		1,170
	Total consolidated sales	$	714,338	$	809,786	$	426,843
Schedule of Property, Plant, and Equipment, Net, by Geographic Location	'
		Fiscal Years Ended
		March 29,		March 30,
		2014		2013
	United States	$	103,287	$	100,343
	United Kingdom		16		23
	China		265		137
	Hong Kong		2		5
	Japan		12		25
	South Korea		5		6
	Taiwan		52		70
	Other Asia		11		14
	Total consolidated property, plant and equipment, net	$	103,650	$	100,623

Quarterly_Results_Unaudited_Ta

Quarterly Results (Unaudited) (Tables)	12 Months Ended
	Mar. 29, 2014
Quarterly Results (Unaudited) [Abstract]	'
Schedule of Unaudited Quarterly Statement of Operations Data	'
		Fiscal Year 2014
		1st		2nd		3rd		4th
		Quarter		Quarter		Quarter		Quarter
	Net sales	$	155,125	$	190,671	$	218,883	$	149,659
	Gross profit		79,498		99,448		103,849		73,368
	Net income		20,642		33,367		41,500		12,602
	Basic income per share	$	0.33	$	0.53	$	0.66	$	0.20
	Diluted income per share		0.31		0.50		0.63		0.20
		Fiscal Year 2013
		1st		2nd		3rd		4th
		Quarter		Quarter		Quarter		Quarter
	Net sales	$	99,006	$	193,774	$	310,133	$	206,873
	Gross profit		53,440		100,087		158,050		83,614
	Net income		6,927		35,449		67,862		26,360
	Basic income per share	$	0.11	$	0.55	$	1.04	$	0.41
	Diluted income per share		0.10		0.51		0.99		0.39

Summary_of_Significant_Account3

Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
Share data in Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Inventory write-down	'	$25,500,000	'
Impairment of goodwill	0	0	0
Advertising expense	1,400,000	1,500,000	1,800,000
Weighted outstanding options excluded from diluted calculation	833	453	1,052
Maximum [Member]	'	'	'
Intangible assets, useful life	'10 years	'	'
Acquired intangible assets, useful life	'15 years	'	'
Share-based compensation, vesting period	'4 years	'	'
Minimum [Member]	'	'	'
Intangible assets, useful life	'1 year	'	'
Acquired intangible assets, useful life	'4 years	'	'
Share-based compensation, vesting period	'0 years	'	'
Buildings [Member] | Maximum [Member]	'	'	'
Estimated useful life	'39 years	'	'
Capitalized Software [Member]	'	'	'
Estimated useful life	'3 years	'	'
Furniture, Fixtures, Machinery and Equipment [Member] | Maximum [Member]	'	'	'
Estimated useful life	'10 years	'	'
Furniture, Fixtures, Machinery and Equipment [Member] | Minimum [Member]	'	'	'
Estimated useful life	'3 years	'	'
Capitalized Enterprise Resource Planning Software [Member]	'	'	'
Estimated useful life	'10 years	'	'
Property, Plant and Equipment [Member]	'	'	'
Depreciation and amortization expense on property, plant and equipment	$12,100,000	$10,200,000	$6,300,000
Property, Plant and Equipment [Member] | Maximum [Member]	'	'	'
Estimated useful life	'39 years	'	'
Property, Plant and Equipment [Member] | Minimum [Member]	'	'	'
Estimated useful life	'3 years	'	'
Futaihua Industrial [Member] | Accounts Receivable [Member]	'	'	'
Concentration risk, percentage	14.00%	21.00%	'
Hongfujin Precision [Member] | Accounts Receivable [Member]	'	'	'
Concentration risk, percentage	44.00%	36.00%	'
Protek [Member] | Accounts Receivable [Member]	'	'	'
Concentration risk, percentage	12.00%	16.00%	'
Avnet, Inc. [Member] | Accounts Receivable [Member]	'	'	'
Concentration risk, percentage	11.00%	'	'
Avnet, Inc. [Member] | Sales [Member]	'	'	'
Concentration risk, percentage	'	'	15.00%
Apple, Inc. [Member] | Sales [Member]	'	'	'
Concentration risk, percentage	80.00%	82.00%	62.00%
Ten Largest Customers [Member]	'	'	'
Number of customers responsible for sales concentration	10	'	'
Ten Largest Customers [Member] | Sales [Member]	'	'	'
Concentration risk, percentage	88.00%	89.00%	74.00%

Summary_of_Significant_Account4

Summary of Significant Accounting Policies (Schedule of Inventories) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Summary of Significant Accounting Policies [Abstract]	'	'
Work in process	$37,967	$34,169
Finished goods	31,776	85,131
Total inventories	$69,743	$119,300

Summary_of_Significant_Account5

Summary of Significant Accounting Policies (Components of Property, Plant and Equipment) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Total property, plant and equipment	$161,318	$151,082
Less: Accumulated depreciation and amortization	-57,668	-50,459
Property, plant and equipment, net	103,650	100,623
Land [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property, plant and equipment	23,806	23,778
Buildings [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property, plant and equipment	37,899	38,257
Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property, plant and equipment	9,440	9,677
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property, plant and equipment	2,387	1,091
Machinery and Equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property, plant and equipment	59,552	51,080
Capitalized Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property, plant and equipment	24,437	24,671
Construction in Progress [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Total property, plant and equipment	$3,797	$2,528

Summary_of_Significant_Account6

Summary of Significant Accounting Policies (Calculation of Basic and Diluted Earnings Per Share) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Numerator:	'	'	'	'	'	'	'	'	'	'	'
Net income	$12,602	$41,500	$33,367	$20,642	$26,360	$67,862	$35,449	$6,927	$108,111	$136,598	$87,983
Denominator:	'	'	'	'	'	'	'	'	'	'	'
Basic weighted average common shares outstanding	'	'	'	'	'	'	'	'	62,926	64,580	64,934
Effect of dilutive securities	'	'	'	'	'	'	'	'	2,609	3,874	3,129
Weighted average diluted shares	'	'	'	'	'	'	'	'	65,535	68,454	68,063
Basic earnings per share	$0.20	$0.66	$0.53	$0.33	$0.41	$1.04	$0.55	$0.11	$1.72	$2.12	$1.35
Diluted earnings per share	$0.20	$0.63	$0.50	$0.31	$0.39	$0.99	$0.51	$0.10	$1.65	$2	$1.29

Marketable_Securities_Narrativ

Marketable Securities (Narrative) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
	security	security
Marketable Securities [Abstract]	'	'
Gross Unrealized Losses	($253,000)	($164,000)
Amortized cost on available for sale securities held at gross unrealized loss	$207,800,000	$124,100,000
Number of securities	74	43

Marketable_Securities_Schedule

Marketable Securities (Schedule of Available-for-sale Securities) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value (Net Carrying Amount)	$352,660	$170,145
Gross Unrealized Losses	-253	-164
Gross Unrealized Gains	73	15
Amortized Cost	352,840	170,294
Corporate Debt Securities - U.S. [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value (Net Carrying Amount)	246,685	94,667
Gross Unrealized Losses	-245	-133
Gross Unrealized Gains	52	2
Amortized Cost	246,878	94,798
U.S. Treasury Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value (Net Carrying Amount)	56,994	34,381
Gross Unrealized Losses	-2	-3
Gross Unrealized Gains	10	4
Amortized Cost	56,986	34,380
Agency Discount Notes [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value (Net Carrying Amount)	2,009	1,027
Gross Unrealized Gains	1	'
Amortized Cost	2,008	1,027
Commercial Paper [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value (Net Carrying Amount)	41,970	40,070
Gross Unrealized Losses	-2	-28
Gross Unrealized Gains	10	9
Amortized Cost	41,962	40,089
Certificates of Deposit [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Estimated Fair Value (Net Carrying Amount)	5,002	'
Gross Unrealized Losses	-4	'
Amortized Cost	$5,006	'

Marketable_Securities_Schedule1

Marketable Securities (Schedule of Cost and Estimated Fair Value of Available-for-sale Securities by Contractual Maturity) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Marketable Securities [Abstract]	'	'
Within 1 year, Amortized Cost	$263,418	$105,290
After 1 year, Amortized Cost	89,422	65,004
Within 1 year, Estimated Fair Value	263,417	105,235
After 1 year, Estimated Fair Value	89,243	64,910
Amortized Cost	352,840	170,294
Estimated Fair Value	$352,660	$170,145

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments (Schedule of Fair Value of Financial Assets) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Cash Equivalents [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	$22,334	$56,262
Cash Equivalents [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	20,456	54,762
Cash Equivalents [Member] | Significant Other Observable Inputs Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	1,878	1,500
Cash Equivalents [Member] | Money-Market Funds [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	20,456	54,762
Cash Equivalents [Member] | Money-Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	20,456	54,762
Cash Equivalents [Member] | Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	1,878	1,500
Cash Equivalents [Member] | Commercial Paper [Member] | Significant Other Observable Inputs Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	1,878	1,500
Available-for-sale Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	352,660	170,145
Available-for-sale Securities [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	56,994	34,381
Available-for-sale Securities [Member] | Significant Other Observable Inputs Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	295,666	135,764
Available-for-sale Securities [Member] | Corporate Debt Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	246,685	94,667
Available-for-sale Securities [Member] | Corporate Debt Securities [Member] | Significant Other Observable Inputs Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	246,685	94,667
Available-for-sale Securities [Member] | U.S. Treasury Securities [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	56,994	34,381
Available-for-sale Securities [Member] | U.S. Treasury Securities [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	56,994	34,381
Available-for-sale Securities [Member] | Agency Discount Notes [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	2,009	1,027
Available-for-sale Securities [Member] | Agency Discount Notes [Member] | Significant Other Observable Inputs Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	2,009	1,027
Available-for-sale Securities [Member] | Commercial Paper [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	41,970	40,070
Available-for-sale Securities [Member] | Commercial Paper [Member] | Significant Other Observable Inputs Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	41,970	40,070
Available-for-sale Securities [Member] | Certificates of Deposit [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	5,002	'
Available-for-sale Securities [Member] | Certificates of Deposit [Member] | Significant Other Observable Inputs Level 2 [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair value of financial assets	$5,002	'

Accounts_Receivable_Net_Compon

Accounts Receivable, Net (Components of Accounts Receivable, Net) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Mar. 26, 2011
In Thousands, unless otherwise specified
Accounts Receivable, Net [Abstract]	'	'	'	'
Gross accounts receivable	$63,449	$69,590	'	'
Allowance for doubtful accounts	-229	-301	-371	-421
Accounts receivable, net	$63,220	$69,289	'	'

Accounts_Receivable_Net_Change

Accounts Receivable, Net (Changes in the Allowance for Doubtful Accounts) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Accounts Receivable, Net [Abstract]	'	'	'
Beginning balance	($301)	($371)	($421)
Bad debt expense, net of recoveries	72	70	50
Ending balance	($229)	($301)	($371)

Goodwill_and_Intangibles_Net_N

Goodwill and Intangibles, Net (Narrative) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Goodwill and Intangibles, Net [Abstract]	'	'	'
Goodwill	$16.40	$6	'
Amortization expense for intangibles	$2.80	$3.40	$3.70

Goodwill_and_Intangibles_Net_S

Goodwill and Intangibles, Net (Schedule of Gross Carrying Amount and Amortization of Intangible Assets) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Amount	$33,656	$24,019
Accumulated Amortization	-21,657	-19,369
Core Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Amount	1,390	1,390
Accumulated Amortization	-1,390	-1,390
License Agreement [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Amount	440	440
Accumulated Amortization	-440	-440
Existing Technology [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Amount	9,826	5,566
Accumulated Amortization	-4,206	-3,802
Trademarks and Tradenames [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Amount	1,600	320
Accumulated Amortization	-384	-320
Customer Relationships [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Amount	2,400	'
Accumulated Amortization	-120	'
Technology Licenses [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross Amount	18,000	16,303
Accumulated Amortization	($15,117)	($13,417)

Goodwill_and_Intangibles_Net_S1

Goodwill and Intangibles, Net (Schedule of Estimated Aggregate Amortization Expense for Intangibles) (Details) (USD $)	Mar. 29, 2014
In Thousands, unless otherwise specified
Goodwill and Intangibles, Net [Abstract]	'
Estimated aggregate amortization expense for the year ended March 28, 2015	$3,443
Estimated aggregate amortization expense for the year ended March 26, 2016	2,295
Estimated aggregate amortization expense for the year ended March 25, 2017	1,101
Estimated aggregate amortization expense for the year ended March 31, 2018	794
Estimated aggregate amortization expense for the year ended March 30, 2019	$794

Acquisition_Narrative_Details

Acquisition (Narrative) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014
Payments to Acquire Businesses, Net of Cash Acquired [Abstract]	'
Acquisition of Acoustic Technologies, net of cash obtained	$20,402

Acquisition_Schedule_of_Recogn

Acquisition (Schedule of Recognized Identified Assets Acquired, Goodwill, and Liabilities Assumed) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Goodwill	$16,400	$6,000
Acoustic [Member]	'	'
Cash and cash equivalents	120	'
Accounts receivable	775	'
Other current assets	2	'
Property and equipment	175	'
Intangible assets	7,940	'
Goodwill	10,340	'
Deferred tax asset - long-term	1,440	'
Other non-current assets	36	'
Current liabilities	-276	'
Total purchase price	$20,552	'

Acquisition_Schedule_of_Finite

Acquisition (Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination) (Details) (Acoustic [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$7,940
Technology [Member]	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	4,260
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	'10 years
Tradename [Member]	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	1,280
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	'10 years
Customer Relationships [Member]	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$2,400
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	'10 years

Asset_Sale_Narrative_Details

Asset Sale (Narrative) (Details) (USD $)	12 Months Ended
	Mar. 30, 2013	Aug. 17, 2012
Asset Sale [Abstract]	'	'
Disposition Price of Other Productive Assets Sold	'	$26,100,000
Proceeds from sale of Apex assets	22,220,000	'
Long-term note receivable	'	3,900,000
Gain on sale of asset	$200,000	'

Revolving_Line_of_Credit_Narra

Revolving Line of Credit (Narrative) (Details) (USD $)	12 Months Ended
	Mar. 29, 2014
Line of Credit [Abstract]	'
Borrowing limit under the revolving credit facility	$100,000,000
Revolving credit sublimit	15,000,000
Basis spread on variable interest rate	0.50%
Covenant Terms, Leverage Ratio Requirement	175.00%
Covenant Terms, Interest Coverage Ratio	350.00%
Line of Credit Facility, Amount Outstanding	0
Line of Credit Facility, Increase (Decrease), Net	$0

Restructuring_Costs_Details

Restructuring Costs (Details) (USD $)	12 Months Ended		18 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014
Restructuring Costs [Abstract]	'	'	'
Restructuring and other, net	($598,000)	$3,292,000	'
Restructuring and related cost, cost incurred to date, net	'	'	2,900,000
Severance costs	'	1,500,000	'
Other restructuring costs	'	2,000,000	'
Restructuring expense paid	'	'	2,500,000
Payments for severance and relocation-related costs	'	'	1,100,000
Asset impairment charge	'	'	1,000,000
Payments for facility-related costs	'	'	400,000
Remaining restructuring accrual	$400,000	'	$400,000

Employee_Benefit_Plans_Details

Employee Benefit Plans (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Employee Benefit Plans [Abstract]	'	'	'
Maximum employer contribution matching percentage	50.00%	50.00%	'
Percentage of employees' annual contribution that qualifies for employer contribution matching	8.00%	6.00%	'
Employee matching contribution expense	$1.80	$1.50	$1.30

Equity_Compensation_Narrative_

Equity Compensation (Narrative) (Details) (USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock compensation expense	$23,074,000	$21,495,000	$12,178,000
Compensation costs related to equity incentive plans not yet recognized	37,500,000	'	'
Net amount received from exercise of stock options granted	5,100,000	12,000,000	4,100,000
Number, exercised	834,000	1,746,000	593,000
Total intrinsic value of stock options exercised	12,400,000	48,600,000	7,600,000
Shares reserved for issuance under the Stock Option Plans	7,300,000	'	'
Fair value of options that became vested during the period	4,800,000	4,800,000	6,300,000
Number of options exercisable	3,004,000	3,200,000	'
Employee Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share based compensation, period from grant date options are exercisable	'10 years	'	'
Compensation costs related to equity incentive plans, weighted average recognition period	'1 year 2 months 16 days	'	'
Restricted Stock Awards [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Compensation costs related to equity incentive plans, weighted average recognition period	'3 months 7 days	'	'
Shares reserved for issuance under the Stock Option Plans	100,000	'	'
Shares available for grant reduction ratio	1.5	'	'
Intrinsic value of awards outstanding	98,000	'	'
Fair value of awards vested	'	951,000	637,000
Number of Shares, Vested	0	62,000	54,000
Restricted Stock Units (RSUs) [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Compensation costs related to equity incentive plans, weighted average recognition period	'1 year 5 months 27 days	'	'
Shares reserved for issuance under the Stock Option Plans	3,900,000	'	'
Vesting percentage	100.00%	'	'
Shares available for grant reduction ratio	1.5	'	'
Intrinsic value of awards outstanding	45,100,000	'	'
Fair value of awards vested	11,100,000	3,800,000	0
Number of Shares, Vested	626,000	193,000	'
Shares withheld to satisfy tax withholding requirements	200,000	100,000	'
Payment to taxing authorities	3,900,000	1,700,000	'
Cash received from cash settled shares	200,000	'	'
Restricted Stock Awards And Restricted Stock Units [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Stock compensation expense	$18,600,000	$16,300,000	$6,300,000
Maximum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation, vesting period	'4 years	'	'
Maximum [Member] | Employee Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation, vesting period	'4 years	'	'
Maximum [Member] | Restricted Stock Awards [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation, vesting period	'4 years	'	'
Maximum [Member] | Restricted Stock Units (RSUs) [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation, vesting period	'3 years	'	'
Minimum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation, vesting period	'0 years	'	'
Minimum [Member] | Employee Stock Option [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation, vesting period	'0 years	'	'
Minimum [Member] | Restricted Stock Units (RSUs) [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation, vesting period	'1 year	'	'
Weighted Average Estimated Fair Value Using Black-Scholes Option Valuation Model [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Fair value of stock options granted under the Black-Scholes valuation model	$10.45	$20.43	$7.58

Equity_Compensation_Summary_of

Equity Compensation (Summary of Activity in Total Stock Available for Grant) (Details)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Equity Compensation [Abstract]	'	'	'
Shares available for grant, beginning balance	5,125	6,257	8,175
Shares available for grant, terminated	'	'	-34
Shares available for grant, granted	-1,785	-1,600	-2,049
Shares available for grant, forfeited	207	468	165
Shares available for grant, ending balance	3,547	5,125	6,257

Equity_Compensation_Summary_of1

Equity Compensation (Summary of Effect of Stock-Based Compensation on Cost of Goods Sold) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Effect on pre-tax income	$23,074	$21,495	$12,178
Income tax benefit	-8,445	-106	'
Total share based compensation expense (net of taxes)	14,629	21,389	12,178
Share based compensation effects on basic earnings per share	$0.50	$0.33	$0.19
Share based compensation effects on diluted earnings per share	$0.48	$0.32	$0.18
Share based compensation effects on operating activities cash flow	14,629	21,389	12,178
Share based compensation effects on financing activities cash flow	8,445	106	'
Cost of Sales [Member]	'	'	'
Effect on pre-tax income	864	751	398
Research and Development [Member]	'	'	'
Effect on pre-tax income	10,392	10,549	5,590
Selling, General and Administrative [Member]	'	'	'
Effect on pre-tax income	$11,818	$10,195	$6,190

Equity_Compensation_Schedule_o

Equity Compensation (Schedule of Fair Value of Stock Option Grants) (Details)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected stock price volatility	'	63.42%	'
Expected stock price volatility, minimum	51.93%	'	59.25%
Expected stock price volatility, maximum	54.34%	'	66.11%
Risk-free interest rate	'	0.31%	'
Risk-free interest rate, minimum	0.47%	'	0.27%
Risk-free interest rate, maximum	0.52%	'	1.43%
Expected term	'	'2 years 5 months 16 days	'
Maximum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term	'2 years 7 months 10 days	'	'3 years 9 months 26 days
Minimum [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Expected term	'2 years 5 months 16 days	'	'2 years 3 months 26 days

Equity_Compensation_Schedule_o1

Equity Compensation (Schedule of Stock Option Activity) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Equity Compensation [Abstract]	'	'	'
Number, beginning balance	4,278	5,904	6,181
Number, granted	318	264	450
Number, exercised	-834	-1,746	-593
Number, forfeited	-10	-144	-67
Number, expired	-27	'	-67
Number, ending balance	3,725	4,278	5,904
Weighted average exercise price, beginning balance	$10.42	$8.23	$7.63
Weighted average exercise price, options granted	$23.45	$37.22	$15.63
Weighted average exercise price, options exercised	$6.12	$6.88	$6.88
Weighted average exercise price, options forfeited	$15.33	$12.52	$7.70
Weighted average exercise price, options expired	$19.52	$20.25	$15.68
Weighted average exercise price, ending balance	$12.42	$10.42	$8.23

Equity_Compensation_Summary_of2

Equity Compensation (Summary of Outstanding Options Vesting, Expected to Vest, or Exercisable) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013
Equity Compensation [Abstract]	'	'
Number of Options, Vested and expected to vest	3,676	'
Weighted Average Exercise Price, Vested and expected to vest	$12.24	'
Weighted Average Remaining Contractual Term, Vested and expected to vest	'5 years 8 months 5 days	'
Aggregate Intrinsic Value, Vested and expected to vest	$32,674	'
Number of Options, Exercisable	3,004	3,200
Weighted Average Exercise Price, Exercisable	$9.54	'
Weighted Average Remaining Contractual Term, Exercisable	'5 years 26 days	'
Aggregate Intrinsic Value, Exercisable	$31,823	'

Equity_Compensation_Summary_of3

Equity Compensation (Summary of Outstanding and Exercisable Options) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Options Outstanding, Number	3,725
Options Outstanding, Weighted Average Remaining Contractual Life	'5 years 8 months 19 days
Options Outstanding, Weighted Average Exercise Price	$12.42
Options Exercisable, Number Exercisable	3,004
Options Exercisable, Weighted Average Exercise Price	$9.54
$2.82 - $5.53 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, lower limit	$2.82
Range of Exercise Prices, upper limit	$5.53
Options Outstanding, Number	502
Options Outstanding, Weighted Average Remaining Contractual Life	'4 years 11 days
Options Outstanding, Weighted Average Exercise Price	$5.16
Options Exercisable, Number Exercisable	502
Options Exercisable, Weighted Average Exercise Price	$5.16
$5.55 - $5.55 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, lower limit	$5.55
Range of Exercise Prices, upper limit	$5.55
Options Outstanding, Number	943
Options Outstanding, Weighted Average Remaining Contractual Life	'5 years 6 months
Options Outstanding, Weighted Average Exercise Price	$5.55
Options Exercisable, Number Exercisable	943
Options Exercisable, Weighted Average Exercise Price	$5.55
$5.66 - $7.87 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, lower limit	$5.66
Range of Exercise Prices, upper limit	$7.87
Options Outstanding, Number	701
Options Outstanding, Weighted Average Remaining Contractual Life	'3 years 2 months 16 days
Options Outstanding, Weighted Average Exercise Price	$7.27
Options Exercisable, Number Exercisable	701
Options Exercisable, Weighted Average Exercise Price	$7.27
$8.06 - $16.25 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, lower limit	$8.06
Range of Exercise Prices, upper limit	$16.25
Options Outstanding, Number	831
Options Outstanding, Weighted Average Remaining Contractual Life	'6 years 8 months 27 days
Options Outstanding, Weighted Average Exercise Price	$15.21
Options Exercisable, Number Exercisable	616
Options Exercisable, Weighted Average Exercise Price	$15.10
$16.28 - $24.14 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, lower limit	$16.28
Range of Exercise Prices, upper limit	$24.14
Options Outstanding, Number	499
Options Outstanding, Weighted Average Remaining Contractual Life	'8 years 3 months 18 days
Options Outstanding, Weighted Average Exercise Price	$22.03
Options Exercisable, Number Exercisable	154
Options Exercisable, Weighted Average Exercise Price	$19.46
$38.99 - $38.99 [Member]	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'
Range of Exercise Prices, lower limit	$38.99
Range of Exercise Prices, upper limit	$38.99
Options Outstanding, Number	249
Options Outstanding, Weighted Average Remaining Contractual Life	'8 years 6 months 7 days
Options Outstanding, Weighted Average Exercise Price	$38.99
Options Exercisable, Number Exercisable	88
Options Exercisable, Weighted Average Exercise Price	$38.99

Equity_Compensation_Summary_of4

Equity Compensation (Summary of Restricted Stock Award Activity) (Details) (Restricted Stock Awards [Member], USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Restricted Stock Awards [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Number of Shares, Balance	5,000	40,000	45,000
Number of Shares, Granted	'	27,000	49,000
Number of Shares, Vested	0	-62,000	-54,000
Number of Shares, Balance	5,000	5,000	40,000
Weighted Average Grant Date Fair Value (per share), Beginning Balance	$17.28	$7.19	$7.21
Weighted Average Grant Date Fair Value (per share), Granted	'	$28.24	$15.31
Weighted Average Grant Date Fair Value (per share), Vested	'	$15.45	$14.57
Weighted Average Grant Date Fair Value (per share), Ending Balance	$17.28	$17.28	$7.19

Equity_Compensation_Summary_of5

Equity Compensation (Summary of Restricted Stock Unit Activity) (Details) (Restricted Stock Units (RSUs) [Member], USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Restricted Stock Units (RSUs) [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Number of Shares, Balance	2,071,000	1,616,000	620,000
Number of Shares, Granted	977,000	864,000	1,017,000
Number of Shares, Vested	-626,000	-193,000	'
Number of Shares, Forfeited	-113,000	-216,000	-21,000
Number of Shares, Balance	2,309,000	2,071,000	1,616,000
Weighted Average Grant Date Fair Value (per share), Beginning Balance	$23.66	$16.52	$16.41
Weighted Average Grant Date Fair Value (per share), Granted	$22.55	$37.26	$16.59
Weighted Average Grant Date Fair Value (per share), Vested	$17.71	$20.56	'
Weighted Average Grant Date Fair Value (per share), Forfeited	$25.81	$21.46	$16.04
Weighted Average Grant Date Fair Value (per share), Ending Balance	$25.26	$23.66	$16.52

Equity_Compensation_Summary_of6

Equity Compensation (Summary of Restricted Stock Units Vested and Expected to Vest) (Details) (Restricted Stock Units (RSUs) [Member], USD $)	12 Months Ended
Share data in Thousands, unless otherwise specified	Mar. 29, 2014
Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Shares, Vested and expected to vest	2,174
Weighted Average Fair Value, Vested and expected to vest	$25.26
Weighted Average Remaining Contractual Term, Vested and expected to vest	'1 year 5 months 16 days

Commitments_and_Contingencies_1

Commitments and Contingencies (Narrative) (Details) (USD $)	12 Months Ended				12 Months Ended
In Millions, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Mar. 29, 2014	Mar. 29, 2014	Mar. 30, 2013	Dec. 22, 2011	Mar. 29, 2014	Mar. 29, 2014	Mar. 29, 2014
				Tucson, Arizona Facility [Member]	Capacity Investment and Loading Agreement with STATS ChipPAC Ltd [Member]	Capacity Investment and Loading Agreement with STATS ChipPAC Ltd [Member]	Capacity Investment and Loading Agreement with STATS ChipPAC Ltd [Member]	Foundry Commitments [Member]	Assembly Purchase Order Commitments [Member]	Outside Test Services Commitments [Member]
				sqft
Purchase Commitment, Excluding Long-term Commitment [Line Items]	'	'	'	'	'	'	'	'	'	'
Square footage of Tucson facilities	'	'	'	28,000	'	'	'	'	'	'
Rent expense	$2.80	$3.20	$4.70	'	'	'	'	'	'	'
Sublease rental income	0.1	0.1	0.4	'	'	'	'	'	'	'
Non-cancelable purchase commitments	'	'	'	'	'	'	10	36.7	2.1	5.3
Purchase commitment, rebate amount	'	'	'	'	10	'	'	'	'	'
Purchase commitment, expected rebate to receive	'	'	'	'	10	'	'	'	'	'
Purchase obligation, rebate utilized	'	'	'	'	$2.60	$4.30	'	'	'	'

Commitments_and_Contingencies_2

Commitments and Contingencies (Schedule of Future Rental Commitments) (Details) (USD $)	Mar. 29, 2014
In Thousands, unless otherwise specified
Rental Commitments [Line Items]	'
2015	$3,065
2016	2,604
2017	2,524
2018	828
2019	377
Thereafter	'
Total minimum lease payment	9,398
Facilities [Member]	'
Rental Commitments [Line Items]	'
2015	3,292
2016	2,623
2017	2,519
2018	823
2019	373
Thereafter	'
Total minimum lease payment	9,630
Subleases [Member]	'
Rental Commitments [Line Items]	'
2015	238
2016	27
2017	'
2018	'
2019	'
Thereafter	'
Total minimum lease payment	265
Net Facilities Commitments [Member]	'
Rental Commitments [Line Items]	'
2015	3,054
2016	2,596
2017	2,519
2018	823
2019	373
Thereafter	'
Total minimum lease payment	9,365
Equipment Commitments [Member]	'
Rental Commitments [Line Items]	'
2015	11
2016	8
2017	5
2018	5
2019	4
Thereafter	'
Total minimum lease payment	$33

Legal_Matters_Details

Legal Matters (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014
	item
	defendant
Legal Matters [Abstract]	'
Number of U.S.Ethernet Innovations lawsuit co-defendants	2
Patents allegedly infringed number	4
Patent infringement settlements, net	($695)

Stockholders_Equity_Details

Stockholder's Equity (Details) (USD $)	12 Months Ended			0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended		18 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Nov. 04, 2010	Mar. 30, 2013	Nov. 20, 2012	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 29, 2014
				November 2010 Repurchase Program [Member]	November 2010 Repurchase Program [Member]	November 2012 Repurchase Program [Member]	November 2012 Repurchase Program [Member]	November 2012 Repurchase Program [Member]	November 2012 Repurchase Program [Member]	Series A Participating Preferred Stock [Member]
Share repurchase program, amount approved	'	'	'	$80,000,000	'	$200,000,000	'	'	'	'
Repurchase and retirement of common stock, shares	'	'	'	'	'	'	2,600,000	3,000,000	5,600,000	'
Repurchase and retirement of common stock, value	52,138,000	86,059,000	76,783,000	'	500,000	'	'	'	137,700,000	'
Average cost per share repurchased	'	'	'	'	'	'	19.78	28.59	24.46	'
Remaining amount available for share repurchases under stock repurchase program	$62,300,000	'	'	'	'	'	'	'	'	'
Preferred stock, shares authorized	5,000,000	5,000,000	'	'	'	'	'	'	'	5,000,000
Preferred Stock, shares issued	'	'	'	'	'	'	'	'	'	0

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss (Details) (USD $)	12 Months Ended					12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012	Mar. 29, 2014	Mar. 30, 2013
			Foreign Currency [Member]	Foreign Currency [Member]	Foreign Currency [Member]	Unrealized Gains (Losses) on Securities [Member]	Unrealized Gains (Losses) on Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]	'	'	'	'	'	'	'
Beginning balance, accumulated other comprehensive loss	($919)	($762)	($770)	($770)	($770)	($149)	$8
Current period activity	-31	-157	'	'	'	-31	-157
Tax effect	64	'	'	'	'	64	'
Ending balance, accumulated other comprehensive loss	($886)	($919)	($770)	($770)	($770)	($116)	($149)

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Income Taxes [Line Items]	'	'
Increase (decrease) in valuation allowance	$8,900,000	($5,800,000)
Net operating loss included in deferred tax assets	29,062,000	28,162,000
Net operating loss included in deferred tax assets, before tax effect	61,200,000	'
Net operating loss included in deferred tax asset, net of valuation allowance	8,800,000	'
Excess stock deductions	110,000,000	'
Tax credit carryforward under with and without method	612,000	'
Undistributed earnings in non-U.S subsidiaries	307,000	'
Unrecognized deferred tax liability	109,000	'
Unrecognized tax benefit	0	0
Accrued interest and penalties	0	'
Interest and penalties incurred during period	0	0
Federal [Member]	'	'
Income Taxes [Line Items]	'	'
Net operating loss included in deferred tax assets	21,400,000	'
Net operating loss carryforwards	81,300,000	'
Section 382 Of Internal Revenue Code [Member]	'	'
Income Taxes [Line Items]	'	'
Net operating loss carryforwards	29,500,000	'
Non-U.S [Member]	'	'
Income Taxes [Line Items]	'	'
Net operating loss carryforwards	2,200,000	'
State [Member]	'	'
Income Taxes [Line Items]	'	'
Net operating loss carryforwards	94,000,000	'
Research Tax Credit Carryforward [Member] | Federal [Member]	'	'
Income Taxes [Line Items]	'	'
Tax credit carryforward	21,000,000	'
Research Tax Credit Carryforward [Member] | State [Member]	'	'
Income Taxes [Line Items]	'	'
Tax credit carryforward	14,500,000	'
Tax credit carryforward subject to expiration	2,800,000	'
Tax credit carryforward not subject to expiration	$11,700,000	'

Income_Taxes_Summary_of_Income

Income Taxes (Summary of Income Before Income Taxes) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Income Taxes [Abstract]	'	'	'
United States	$155,431	$200,124	$79,425
Non-U.S.	306	1,066	558
Income before income taxes	$155,737	$201,190	$79,983

Income_Taxes_Summary_of_Provis

Income Taxes (Summary of Provision (Benefit) for Income Taxes) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Income Taxes [Line Items]	'	'	'
Total current tax provision	$11,143	$4,103	$2,101
Total deferred tax provision (benefit)	36,483	60,489	-10,101
Total provision (benefit) for income taxes	47,626	64,592	-8,000
Federal [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Total current tax provision	10,550	3,537	1,322
U.S [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Total deferred tax provision (benefit)	36,543	60,506	-10,102
State [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Total current tax provision	258	323	518
Non-U.S [Member]	'	'	'
Income Taxes [Line Items]	'	'	'
Total current tax provision	335	243	261
Total deferred tax provision (benefit)	($60)	($17)	$1

Income_Taxes_Summary_of_Provis1

Income Taxes (Summary of Provision (Benefit) for Income Taxes, Statutory Federal Rate Pretax Income Reconciliation) (Details)	12 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Income Taxes [Abstract]	'	'	'
Expected income tax provision at the U.S. federal statutory rate	35.00%	35.00%	35.00%
Valuation allowance changes affecting the provision of income taxes	-0.10%	-1.30%	-46.70%
Foreign taxes at different rates	0.10%	-0.10%	'
R&D credit	-0.90%	-2.10%	'
Stock compensation	-0.10%	0.10%	1.00%
Recognition of prior year benefit	-4.10%	'	'
Nondeductible expenses	0.50%	0.30%	0.10%
Other	0.20%	0.20%	0.60%
Provision (benefit) for income taxes	30.60%	32.10%	-10.00%

Income_Taxes_Significant_Compo

Income Taxes (Significant Components of Deferred Tax Assets and Liabilities) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Deferred tax assets:	'	'
Inventory valuation	$7,692	$12,065
Accrued expenses and allowances	3,905	5,077
Net operating loss carryforwards	29,062	28,162
Research and development tax credit carryforwards	15,164	37,054
State tax credit carryforwards	231	237
Capitalized research and development	3,485	6,601
Other	28,627	21,505
Total deferred tax assets	88,166	110,701
Valuation allowance for deferred tax assets	-32,159	-23,232
Net deferred tax assets	56,007	87,469
Deferred tax liabilities:	'	'
Depreciation and amortization	5,709	5,238
Acquisition intangibles	3,209	623
Total deferred tax liabilities	8,918	5,861
Total net deferred tax assets	$47,089	$81,608

Income_Taxes_Summary_of_Deferr

Income Taxes (Summary of Deferred Tax Assets) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Income Taxes [Abstract]	'	'
Deferred tax assets	$22,024	$64,937
Long-term deferred tax assets	25,065	16,671
Total net deferred tax assets	$47,089	$81,608

Segment_Information_Narrative_

Segment Information (Narrative) (Details)	12 Months Ended
	Mar. 29, 2014
	segment
Segment Information [Abstract]	'
Number of reportable segments	1

Segment_Information_Schedule_o

Segment Information (Schedule of Segment Revenue from Product Lines) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	$149,659	$218,883	$190,671	$155,125	$206,873	$310,133	$193,774	$99,006	$714,338	$809,786	$426,843
Audio Products [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	667,739	754,769	350,743
Energy Products [Member]	'	'	'	'	'	'	'	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	$46,599	$55,017	$76,100

Segment_Information_Schedule_o1

Segment Information (Schedule of Sales by Geographic Location Based on the Sales Office Location) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	$149,659	$218,883	$190,671	$155,125	$206,873	$310,133	$193,774	$99,006	$714,338	$809,786	$426,843
United States [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	35,582	38,670	50,230
European Union [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	13,125	17,601	23,493
United Kingdom [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	1,513	1,610	434
China [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	617,850	700,051	294,143
Hong Kong [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	6,057	8,590	8,671
Japan [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	5,150	9,299	15,196
South Korea [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	9,338	8,975	9,781
Taiwan [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	13,739	11,694	10,662
Other Asia [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	11,112	10,387	13,063
Other Non-U.S. Countries [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	$872	$2,909	$1,170

Segment_Information_Schedule_o2

Segment Information (Schedule of Property, Plant, and Equipment, Net, by Geographic Location) (Details) (USD $)	Mar. 29, 2014	Mar. 30, 2013
In Thousands, unless otherwise specified
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	$103,650	$100,623
United States [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	103,287	100,343
United Kingdom [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	16	23
China [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	265	137
Hong Kong [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	2	5
Japan [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	12	25
South Korea [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	5	6
Taiwan [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	52	70
Other Asia [Member]	'	'
Revenues from External Customers and Long-Lived Assets [Line Items]	'	'
Property and equipment, net	$11	$14

Quarterly_Results_Unaudited_Sc

Quarterly Results (Unaudited) (Schedule of Unaudited Quarterly Statement of Operations Data) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 29, 2014	Mar. 30, 2013	Mar. 31, 2012
Quarterly Results (Unaudited) [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Net sales	$149,659	$218,883	$190,671	$155,125	$206,873	$310,133	$193,774	$99,006	$714,338	$809,786	$426,843
Gross profit	73,368	103,849	99,448	79,498	83,614	158,050	100,087	53,440	356,163	395,191	230,441
Net income	$12,602	$41,500	$33,367	$20,642	$26,360	$67,862	$35,449	$6,927	$108,111	$136,598	$87,983
Basic earnings per share	$0.20	$0.66	$0.53	$0.33	$0.41	$1.04	$0.55	$0.11	$1.72	$2.12	$1.35
Diluted earnings per share	$0.20	$0.63	$0.50	$0.31	$0.39	$0.99	$0.51	$0.10	$1.65	$2	$1.29

Subsequent_Event_Narrative_Det

Subsequent Event (Narrative) (Details)	Mar. 29, 2014	Apr. 29, 2014	Apr. 29, 2014	Apr. 29, 2014	Apr. 29, 2014	Apr. 29, 2014	Apr. 29, 2014	Apr. 29, 2014	Apr. 29, 2014	Apr. 29, 2014
	USD ($)	Subsequent Event Wolfson Acquisition [Member]	Subsequent Event Wolfson Acquisition [Member]	Wolfson Wells Fargo Line of Credit [Member]	Maximum [Member]	Maximum [Member]	Maximum [Member]	Minimum [Member]	Minimum [Member]	Minimum [Member]
		USD ($)	GBP (£)	Subsequent Event Wolfson Acquisition [Member]	Wolfson Wells Fargo Line of Credit [Member]	Wolfson Wells Fargo Line of Credit [Member]	Wolfson Wells Fargo Line of Credit [Member]	Wolfson Wells Fargo Line of Credit [Member]	Wolfson Wells Fargo Line of Credit [Member]	Wolfson Wells Fargo Line of Credit [Member]
				USD ($)	Subsequent Event Wolfson Acquisition [Member]	Base Rate [Member]	London Interbank Offered Rate (LIBOR) [Member]	Subsequent Event Wolfson Acquisition [Member]	Base Rate [Member]	London Interbank Offered Rate (LIBOR) [Member]
						Subsequent Event Wolfson Acquisition [Member]	Subsequent Event Wolfson Acquisition [Member]		Subsequent Event Wolfson Acquisition [Member]	Subsequent Event Wolfson Acquisition [Member]
Business Acquisition, Share Price	'	'	£ 2.35	'	'	'	'	'	'	'
Offer Consideration	'	$488,000,000	£ 291,000,000	'	'	'	'	'	'	'
USD to GBP exchange rate at acquisition	'	1.68	'	'	'	'	'	'	'	'
Enterprise Value	'	467,000,000	278,000,000	'	'	'	'	'	'	'
Borrowing limit under the revolving credit facility	100,000,000	'	'	225,000,000	'	'	'	'	'	'
Line of Credit Facility, Interest Rate Description	'	'	'	'	'	'.25%	'2.25%	'	'0%	'1.75%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	'	'	'	'	0.40%	'	'	0.30%	'	'
Covenant Terms, Leverage Ratio Requirement	175.00%	'	'	175.00%	'	'	'	'	'	'
Covenant Terms, Sum of Cash and Cash Equiv Requirement	'	'	'	$75,000,000	'	'	'	'	'	'