RF Micro Devices (RFMD) 10-Q 25 Oct 13 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Sep. 28, 2013	Oct. 18, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	RF MICRO DEVICES INC
Entity Central Index Key	911160
Document Type	10-Q
Document Period End Date	28-Sep-13
Amendment Flag	FALSE
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	-26
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		282,345,184

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 28, 2013	Mar. 30, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$101,489	$101,662
Short-term investments (Note 6)	47,999	77,987
Accounts receivable, less allowance of $419 and $434 as of September 28, 2013 and March 30, 2013, respectively	188,715	143,647
Inventories (Note 3)	144,294	161,193
Prepaid expenses	12,186	13,034
Other receivables	23,122	16,233
Other current assets (Note 5)	6,378	2,481
Total current assets	524,183	516,237
Property and equipment, net of accumulated depreciation of $537,147 at September 28, 2013 and $538,494 at March 30, 2013	196,590	191,526
Goodwill (Note 9)	103,901	104,846
Intangible assets, net (Note 9)	79,893	93,197
Long-term investments (Note 6)	4,494	4,281
Other non-current assets (Note 5)	21,606	21,912
Total assets	930,667	931,999
Current liabilities:
Accounts payable	109,014	123,468
Accrued liabilities	62,712	55,760
Current portion of long term debt, net of unamortized discount (Note 4)	84,580	0
Other current liabilities	148	6,486
Total current liabilities	256,454	185,714
Long-term debt, net of unamortized discount (Note 4)	0	82,035
Other long-term liabilities (Note 5)	23,339	25,236
Total liabilities	279,793	292,985
Shareholders’ equity:
Preferred stock, no par value; 5,000 shares authorized; no shares issued and outstanding
Common stock, no par value; 500,000 shares authorized; 282,323 and 280,160 shares issued and outstanding at September 28, 2013 and March 30, 2013, respectively	1,263,718	1,259,420
Accumulated other comprehensive loss, net of tax	-389	-498
Accumulated deficit	-612,455	-619,908
Total shareholders’ equity	650,874	639,014
Total liabilities and shareholders’ equity	$930,667	$931,999

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Sep. 28, 2013	Mar. 30, 2013
In Thousands, unless otherwise specified
Statement of Financial Position [Abstract]
Allowance for accounts receivable	$419	$434
Property and equipment, accumulated depreciation	$537,147	$538,494
Preferred stock, par value
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value
Common stock, shares authorized	500,000	500,000
Common stock, shares issued	282,323	280,160
Common stock, shares outstanding	282,323	280,160

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Income Statement [Abstract]
Revenue	$310,716	$209,671	$603,712	$412,331
Cost of goods sold	206,060	143,136	405,587	281,542
Gross profit	104,656	66,535	198,125	130,789
Operating expenses:
Research and development	49,204	41,968	97,529	83,544
Marketing and selling	18,918	16,238	38,327	33,116
General and administrative	24,062	18,593	43,554	31,988
Other operating expense (income)	3,016	-114	6,024	5,158
Total operating expenses	95,200	76,685	185,434	153,806
Income (loss) from operations	9,456	-10,150	12,691	-23,017
Interest expense	-1,403	-1,644	-2,912	-3,718
Interest income	41	64	82	143
Loss on retirement of convertible subordinated notes (Note 4)	0	-2,034	0	-2,756
Other income (expense)	363	617	771	-121
Income (loss) before income taxes	8,457	-13,147	10,632	-29,469
Income tax expense (Note 5)	-2,565	-3,309	-3,179	-6,126
Net income (loss)	$5,892	($16,456)	$7,453	($35,595)
Net income (loss) per share (Note 2):
Basic (in dollars per share)	$0.02	($0.06)	$0.03	($0.13)
Diluted (in dollars per share)	$0.02	($0.06)	$0.03	($0.13)
Shares used in per share calculation:
Basic (in shares)	282,017	278,105	281,403	277,625
Diluted (in shares)	287,629	278,105	287,367	277,625

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	$5,892	($16,456)	$7,453	($35,595)
Other comprehensive income (loss):
Unrealized gain (loss) on marketable securities, net of tax	2	-66	5	-49
Foreign currency translation adjustment, including intra-entity foreign currency transactions that are of a long-term-investment nature	95	328	103	-85
Reclassification adjustments, net of tax:
Recognized loss on marketable securities	0	0	0	3
Amortization of pension actuarial loss	0	0	1	0
Other comprehensive income (loss)	97	262	109	-131
Total comprehensive income (loss)	$5,989	($16,194)	$7,562	($35,726)

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Cash flows from operating activities:
Net income (loss)	$7,453	($35,595)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	22,901	26,050
Amortization and other non-cash items	16,670	12,535
Excess tax benefit from exercises of stock options	-23	0
Deferred income taxes	2,861	1,327
Foreign currency adjustments	-755	-931
Loss on retirement of convertible subordinated notes	0	2,756
Loss on assets and other, net	2,945	4,978
(Income) loss from equity investment	-213	91
Share-based compensation expense	19,868	15,292
Changes in operating assets and liabilities:
Accounts receivable, net	-45,060	-14,758
Inventories	16,947	-4,638
Prepaid expense and other current and non-current assets	-6,203	-12,253
Accounts payable and accrued liabilities	1,039	22,497
Income tax payable/recoverable	-9,012	556
Other liabilities	-665	-394
Net cash provided by operating activities	28,753	17,513
Investing activities:
Purchase of property and equipment	-43,928	-20,124
Purchase of intangibles	-330	-143
Proceeds from sale of property and equipment	392	73
Purchase of securities available-for-sale	-47,986	-23,988
Proceeds from maturities of securities available-for-sale	78,000	96,979
Net cash (used in) provided by investing activities	-13,852	52,797
Financing activities:
Payment of debt	0	-79,432
Debt issuance cost	-122	0
Excess tax benefit from exercises of stock options	23	0
Proceeds from the issuance of common stock	4,340	2,144
Repurchase of common stock, including transaction costs	-12,000	-6,999
Tax withholding paid on behalf of employees for restricted stock units	-8,031	-5,824
Restricted cash associated with financing activities	89	2
Repayment of capital lease obligations	-32	-30
Net cash used in financing activities	-15,733	-90,139
Effect of exchange rate changes on cash	659	-697
Net decrease in cash and cash equivalents	-173	-20,526
Cash and cash equivalents at the beginning of the period	101,662	135,524
Cash and cash equivalents at the end of the period	$101,489	$114,998

Basis_of_Presentation_and_Sign

Basis of Presentation and Significant Accounting Policies	6 Months Ended
	Sep. 28, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES
	The accompanying Condensed Consolidated Financial Statements of RF Micro Devices, Inc. and Subsidiaries (together, the “Company” or “RFMD”) have been prepared in conformity with accounting principles generally accepted in the United States. The preparation of these financial statements requires management to make estimates and assumptions, which could differ materially from actual results. In addition, certain information or footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed, or omitted, pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). In the opinion of management, the financial statements include all adjustments (which are of a normal and recurring nature) necessary for the fair presentation of the results of the interim periods presented. These Condensed Consolidated Financial Statements should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended March 30, 2013.
	The Condensed Consolidated Financial Statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.
	The Company uses a 52- or 53-week fiscal year ending on the Saturday closest to March 31 of each year. The first fiscal quarter of each year ends on the Saturday closest to June 30, the second fiscal quarter of each year ends on the Saturday closest to September 30 and the third fiscal quarter of each year ends on the Saturday closest to December 31.

Net_Income_Loss_Per_Share

Net Income (Loss) Per Share	6 Months Ended
	Sep. 28, 2013
Earnings Per Share [Abstract]
NET INCOME (LOSS) PER SHARE	NET INCOME (LOSS) PER SHARE
	The following table sets forth a reconciliation of the numerators and denominators in the computation of basic and diluted net income (loss) per share (in thousands, except per share data):
		Three Months Ended					Six Months Ended
		September 28, 2013		September 29, 2012			September 28, 2013		September 29, 2012
	Numerator:
	Numerator for basic and diluted net income (loss) per share — net income (loss) available to common shareholders	$	5,892	$	(16,456	)	$	7,453	$	(35,595	)
	Denominator:
	Denominator for basic net income (loss) per share — weighted average shares	282,017		278,105			281,403		277,625
	Effect of dilutive securities:
	Share-based awards	5,612		—			5,964		—
	Denominator for diluted net income (loss) per share — adjusted weighted average shares and assumed conversions	287,629		278,105			287,367		277,625
	Basic net income (loss) per share	$	0.02	$	(0.06	)	$	0.03	$	(0.13	)
	Diluted net income (loss) per share	$	0.02	$	(0.06	)	$	0.03	$	(0.13	)
	In the computation of diluted net income per share for the three and six months ended September 28, 2013, outstanding stock options to purchase approximately 8.2 million shares and 8.5 million shares, respectively, were excluded because the exercise price of the options was greater than the average market price of the underlying common stock and the effect of their inclusion would have been anti-dilutive. In the computation of diluted net loss per share for the three and six months ended September 29, 2012, all outstanding stock options were excluded because the effect of their inclusion would have been anti-dilutive.
	The computation of diluted net income (loss) per share does not assume the conversion of the Company’s $200 million initial aggregate principal amount of 0.75% Convertible Subordinated Notes due 2012 (the “2012 Notes”) or the Company’s $175 million initial aggregate principal amount of 1.00% Convertible Subordinated Notes due 2014 (the “2014 Notes”). The 2012 Notes became due on April 15, 2012, and the remaining principal balance of $26.5 million was paid with cash on hand.
	The 2014 Notes generally would become dilutive to earnings if the average market price of the Company’s common stock exceeds approximately $8.05 per share. The maximum number of shares issuable upon conversion of the 2014 Notes as of September 28, 2013, is approximately 8.4 million shares (after giving effect to an aggregate of $87.5 million principal amount of 2014 Notes that were previously purchased and retired by the Company), which may be adjusted as a result of stock splits, stock dividends and antidilution provisions.
	Share Repurchase
	During the three and six months ended September 28, 2013, the Company repurchased 2.4 million shares of its common stock at an average price of $5.03 on the open market. During the three months ended September 29, 2012, the Company did not repurchase any shares of its common stock. During the six months ended September 29, 2012, the Company repurchased 1.9 million shares of its common stock at an average price of $3.75 on the open market.

Inventories

Inventories	6 Months Ended
	Sep. 28, 2013
Inventory Disclosure [Abstract]
INVENTORIES	INVENTORIES
	Inventories are stated at the lower of cost or market determined using the average cost method. The components of inventories are as follows (in thousands):
		September 28, 2013		March 30, 2013
	Raw materials	$	37,769	$	45,656
	Work in process	53,019		64,108
	Finished goods	53,506		51,429
	Total inventories	$	144,294	$	161,193

Debt

Debt	6 Months Ended
	Sep. 28, 2013
Debt Disclosure [Abstract]
DEBT	DEBT
	Convertible Debt
	The 2014 Notes will mature on April 15, 2014, and the balance of $84.6 million as of September 28, 2013 is recorded in "Current portion of long term debt" on the Condensed Consolidated Balance Sheet.
	During the three months ended September 29, 2012, the Company purchased and retired $32.0 million original principal amount of its 2014 Notes, for an average price of $98.33, which resulted in a loss of $2.0 million as a result of applying ASC 470-20. During the six months ended September 29, 2012, the Company purchased and retired $47.4 million original principal amount of its 2014 Notes, for an average price of $98.34, which resulted in a loss of $2.8 million, as a result of applying ASC 470-20. ASC 470-20 requires the Company to record gains and losses on the early retirement of its 2014 Notes in the period of derecognition, depending on whether the fair market value at the time of derecognition was greater than, or less than, the carrying value of the debt.
	As of September 28, 2013, the 2014 Notes had a fair value on the Private Offerings, Resale and Trading through Automated Linkages ("PORTAL") Market of $88.6 million, compared to a carrying value of $84.6 million. As of March 30, 2013, the 2014 Notes had a fair value on the PORTAL Market of $86.7 million, compared to a carrying value of $82.0 million.
	Credit Agreement
	In March 2013, the Company and certain material domestic subsidiaries of the Company (the “Guarantors”) entered into a four-year senior credit facility with Bank of America, N.A., as Administrative Agent and a lender, and a syndicate of other lenders (the “Credit Agreement”). The Credit Agreement includes a $125.0 million revolving credit facility, which includes a $5.0 million sublimit for the issuance of standby letters of credit and a $5.0 million sublimit for swingline loans. The Company may request, at any time and from time to time, that the revolving credit facility be increased by an amount not to exceed $50.0 million. The revolving credit facility is available to finance working capital, capital expenditures and other corporate purposes. The Company’s obligations under the Credit Agreement are jointly and severally guaranteed by the Guarantors. On August 15, 2013, the Credit Agreement was amended to revise the definition of "Eurodollar Base Rate" and a provision regarding restricted payments. The Company currently has no outstanding amounts under the Credit Agreement and is in compliance with the financial covenants associated with the Credit Agreement as of September 28, 2013.

Income_Taxes

Income Taxes	6 Months Ended
	Sep. 28, 2013
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES
	Income Tax Expense
	The Company’s provision for income taxes for the three and six months ended September 28, 2013 and September 29, 2012 has been calculated by applying an estimate of the annual effective tax rate for the full fiscal year to “ordinary” income or loss (pre-tax income or loss excluding unusual or infrequently occurring discrete items) for the three and six months ended September 28, 2013 and September 29, 2012.
	The Company’s income tax expense was $2.6 million and $3.2 million for the three and six months ended September 28, 2013, respectively, and $3.3 million and $6.1 million for the three and six months ended September 29, 2012, respectively. The Company’s effective tax rate was 30.3% and 29.9% for the three and six months ended September 28, 2013, respectively, and (25.2)% and (20.8)% for the three and six months ended September 29, 2012, respectively. The Company's effective tax rate for both the second quarter of fiscal 2014 and the second quarter of fiscal 2013 differed from the statutory rate primarily due to tax rate differences in foreign jurisdictions, state income taxes, domestic tax credits generated, adjustments to the valuation allowance limiting the recognition of the benefit of domestic deferred tax assets, and for fiscal 2014, adjustments to reduce the carrying value of United Kingdom (U.K.) deferred tax assets.
	Deferred Taxes
	The valuation allowance against net deferred tax assets has decreased in fiscal 2014 by $7.6 million from the $164.2 million balance as of the end of fiscal 2013. The Company intends to maintain a valuation allowance against its domestic net deferred tax assets until sufficient positive evidence exists to support its full or partial reversal. The amount of the deferred tax assets actually realized could vary depending upon the amount of taxable income the Company is able to generate in the various taxing jurisdictions in which the Company operates.
	In July 2013, the Company sold its manufacturing facility located in the U.K., which generated its U.K. tax loss carryovers. U.K. tax loss carryovers can only be used to offset income generated by the same trade or business from which they arose. In connection with the sale, the deferred tax assets related to U.K. tax losses were written off and the related valuation allowance reversed.
	The Company has outstanding domestic federal and state tax net operating loss (“NOLs”) carry-forwards that began or will begin to expire in fiscal 2019 and fiscal 2014, respectively, if unused. The use of the NOLs that were acquired in prior year acquisitions is subject to certain annual limitations under Internal Revenue Code Section 382 and similar state tax provisions.
	Uncertain Tax Positions
	The Company’s gross unrecognized tax benefits increased from $37.9 million as of the end of fiscal 2013 to $38.5 million as of the end of the second quarter of fiscal 2014, with the change arising from a $0.6 million increase related to tax positions taken with respect to the current fiscal year.
	U.S. federal tax returns through fiscal 2009, North Carolina tax returns through fiscal 2008, and German tax returns through calendar year 2007 have been examined by their respective taxing authorities. Subsequent tax years in each of those jurisdictions remain open for examination. Other material jurisdictions that are subject to examination by tax authorities are California (fiscal 2009 through present), the U.K. (fiscal 2011 through present), and China (calendar year 2003 through present).

Investments_and_Fair_Value_Mea

Investments and Fair Value Measurements	6 Months Ended
	Sep. 28, 2013
Investments and Fair Value Measurements [Abstract]
INVESTMENTS AND FAIR VALUE MEASUREMENTS	INVESTMENTS AND FAIR VALUE MEASUREMENTS
	Available-For-Sale
	The following is a summary of available-for-sale securities as of September 28, 2013 and March 30, 2013 (in thousands):
		Available-for-Sale Securities
		Cost		Gross		Gross			Estimated Fair
				Unrealized		Unrealized			Value
				Gains		Losses
	September 28, 2013
	U.S. government/agency securities	$	47,994	$	5	$	—		$	47,999
	Auction rate securities	2,150		—		—			2,150
	Money market funds	18,344		—		—			18,344
		$	68,488	$	5	$	—		$	68,493
	March 30, 2013
	U.S. government/agency securities	$	77,988	$	3	$	(4	)	$	77,987
	Auction rate securities	2,150		—		—			2,150
	Money market funds	26,328		—		—			26,328
		$	106,466	$	3	$	(4	)	$	106,465
	The estimated fair value of available-for-sale securities was based on the prevailing market values on September 28, 2013 and March 30, 2013. We determine the cost of an investment sold based on the specific identification method.
	The gross realized gains and losses recognized on available-for-sale securities for both the three and six months ended September 28, 2013 and September 29, 2012, were insignificant.
	No available-for-sale investments were in a continuous unrealized loss position for fewer than 12 months as of September 28, 2013. The available-for-sale investments that were in a continuous unrealized loss position for fewer than 12 months as of March 30, 2013 consisted of U.S. government/agency securities with gross unrealized losses of less than $0.1 million and an aggregate fair value of approximately $14.0 million. No available-for-sale investments were in a continuous unrealized loss position for 12 months or greater as of September 28, 2013 or as of March 30, 2013.
	The amortized cost of available-for-sale investments in debt securities with contractual maturities is as follows (in thousands):
		September 28, 2013				March 30, 2013
		Cost		Estimated		Cost			Estimated
				Fair Value					Fair Value
	Due in less than one year	$	66,338	$	66,343	$	104,316		$	104,315
	Due after ten years	2,150		2,150		2,150			2,150
	Total investments in debt securities	$	68,488	$	68,493	$	106,466		$	106,465
	Fair Value Measurements
	On a quarterly basis, the Company measures the fair value of its marketable securities, which are comprised of U.S. government/agency securities, auction rate securities (ARS), and money market funds. Marketable securities are reported at fair value in cash and cash equivalents, short-term investments and long-term investments on the Company’s Condensed Consolidated Balance Sheet. The related unrealized gains and losses are included in accumulated other comprehensive loss, a component of shareholders’ equity, net of tax.
	Recurring Fair Value Measurements
	The fair value of the financial assets measured at fair value on a recurring basis was determined using the following levels of inputs as of September 28, 2013 and March 30, 2013 (in thousands):
		Total		Quoted Prices In		Significant Other
				Active Markets For		Observable Inputs
				Identical Assets		(Level 2)
				(Level 1)
	September 28, 2013
	U.S. government/agency securities	$	47,999	$	47,999	$	—
	Auction rate securities	2,150		—		2,150
	Money market funds	18,344		18,344		—
		$	68,493	$	66,343	$	2,150
	March 30, 2013
	U.S. government/agency securities	$	77,987	$	77,987	$	—
	Auction rate securities	2,150		—		2,150
	Money market funds	26,328		26,328		—
		$	106,465	$	104,315	$	2,150
	ARS are debt instruments with interest rates that reset through periodic short-term auctions. The Company’s Level 2 ARS are valued at par based on quoted prices for identical or similar instruments in markets that are not active. As of September 28, 2013 and March 30, 2013, the Company did not have any Level 3 securities.
	Nonrecurring Fair Value Measurements
	The Company's non-financial assets, such as intangible assets and property and equipment, are measured at fair value when there is an indicator of impairment and recorded at fair value only when an impairment charge is recognized. During the first quarter of fiscal 2014, the Company recorded a $1.7 million impairment of certain property and equipment as a result of the phase out of manufacturing and pending sale of its manufacturing facility located in the U.K. As of June 29, 2013, the fair value of these impaired assets was estimated to be $0.8 million using a significant Level 3 unobservable input (market valuation approach). The market valuation approach uses prices and other relevant information generated primarily by recent market transactions involving similar or comparable assets, as well as the Company's experience. During the second quarter of fiscal 2014, the Company sold its U.K. manufacturing facility which resulted in a loss on these impaired assets of $0.6 million.
	Other Fair Value Disclosures
	The carrying values of cash and cash equivalents, accounts receivable, accounts payable and other accrued liabilities approximate fair values because of the relatively short-term maturities of these instruments.
	The fair value of the Company’s 2014 Notes is measured using a Level 1 input obtained from the PORTAL Market and is disclosed in Note 4 to the Condensed Consolidated Financial Statements.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	6 Months Ended
	Sep. 28, 2013
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS
	In February 2013, the FASB issued ASU 2013-02, "Reporting of Amounts Reclassified out of Accumulated Other Comprehensive Income." ASU 2013-02 requires reporting the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required to be reclassified in its entirety to net income. For other amounts that are not required to be reclassified in their entirety to net income in the same reporting period, an entity is required to cross-reference other disclosures that provide additional detail about these amounts. The amendments do not change the current requirements for reporting net income or other comprehensive income in the financial statements. The Company adopted this guidance in the first quarter of fiscal 2014. The adoption of this guidance affected the presentation of comprehensive income, but did not impact the Company's financial position, results of operations or cash flows.

Operating_Segment_Information

Operating Segment Information	6 Months Ended
	Sep. 28, 2013
Segment Reporting [Abstract]
OPERATING SEGMENT INFORMATION	OPERATING SEGMENT INFORMATION
	RFMD’s operating segments as of September 28, 2013 are its Cellular Products Group (CPG), Multi-Market Products Group (MPG) and Compound Semiconductor Group (CSG).
	CPG is a leading global supplier of cellular radio frequency (RF) solutions that perform various functions in the cellular front end section. The cellular front end section is located between the transceiver and the antenna. These RF solutions are required in third generation (3G) and fourth generation (4G) devices, and they include power amplifier (PA) modules, transmit modules, PA duplexer modules, antenna control solutions, antenna switch modules, switch filter modules, switch duplexer modules and RF power management solutions. CPG supplies its broad portfolio of cellular RF solutions into a variety of mobile devices, including smartphones, handsets, netbooks, notebooks and tablets.
	MPG is a leading global supplier of a broad array of RF solutions, such as PAs, low noise amplifiers, variable gain amplifiers, high power gallium nitride transistors, attenuators, modulators, switches, voltage-controlled oscillators (VCOs), phase locked loop modules, multi-chip modules, front end modules, and a range of military and space components (amplifiers, mixers, VCOs and power dividers). Major communications applications include mobile wireless infrastructure, point-to-point and microwave radios, small cells, WiFi (routers, access points, mobile devices and customer premises equipment) and cable television (CATV) infrastructure. Industrial applications include Smart Energy/Advanced Metering Infrastructure (AMI), private mobile radio, and test and measurement equipment. Aerospace and defense applications include military communications, radar and electronic warfare, as well as space communications.
	During the second quarter of fiscal 2013, the Company's foundry services were realigned from its CSG to its MPG. CSG is a business group established to leverage RFMD’s compound semiconductor technologies and related expertise in RF and non-RF end markets and applications.
	As of September 28, 2013, the Company’s reportable segments are CPG and MPG. CSG does not currently meet the quantitative threshold for an individually reportable segment under ASC 280-10-50-12 and is therefore included in the “Other operating segment” line in the following tables. CPG and MPG are separate reportable segments based on the organizational structure and information reviewed by the Company’s Chief Executive Officer, who is the Company’s chief operating decision maker (or CODM), and are managed separately based on the end markets and applications they support. The CODM allocates resources and assesses the performance of each operating segment primarily based on non-GAAP operating income (loss) and non-GAAP operating income (loss) as a percentage of revenue.
	The “All other” category includes operating expenses such as share-based compensation, amortization of purchased intangible assets, acquisition-related costs, loss on asset transfer transaction, intellectual property rights (IPR) litigation costs, the inventory revaluation resulting from the transfer of the Company's molecular beam epitaxy (“MBE”) operations, net restructuring costs, and other miscellaneous corporate overhead expenses that the Company does not allocate to its reportable segments because these expenses are not included in the segment operating performance measures evaluated by the Company’s CODM. The CODM does not evaluate operating segments using discrete asset information. The Company’s operating segments do not record inter-company revenue. The Company does not allocate gains and losses from equity investments, interest and other income, or taxes to operating segments. Except as discussed above regarding the “All other” category, the Company’s accounting policies for segment reporting are the same as for RFMD as a whole.
	The following tables present details of the Company’s reportable segments and a reconciliation of the “All other” category (in thousands):
		Three Months Ended						Six Months Ended
		September 28,			September 29,			September 28,			September 29,
		2013			2012			2013			2012
	Net revenue:
	CPG	$	255,476		$	160,447		$	493,188		$	313,025
	MPG	55,232			49,224			110,516			99,306
	Other operating segment	8			—			8			—
	Total net revenue	$	310,716		$	209,671		$	603,712		$	412,331
	Income (loss) from operations:
	CPG	$	29,082		$	7,204		$	51,032		$	10,460
	MPG	8,871			2,774			15,731			4,339
	Other operating segment	(751		)	(655		)	(1,573		)	(1,264		)
	All other	(27,746		)	(19,473		)	(52,499		)	(36,552		)
	Income (loss) from operations	9,456			(10,150		)	12,691			(23,017		)
	Interest expense	(1,403		)	(1,644		)	(2,912		)	(3,718		)
	Interest income	41			64			82			143
	Loss on retirement of convertible subordinated notes	—			(2,034		)	—			(2,756		)
	Other income (expense)	363			617			771			(121		)
	Income (loss) before income taxes	$	8,457		$	(13,147	)	$	10,632		$	(29,469	)
		Three Months Ended						Six Months Ended
		September 28,			September 29,			September 28,			September 29,
		2013			2012			2013			2012
	Reconciliation of “All other” category:
	Share-based compensation expense	$	(10,436	)	$	(9,546	)	$	(19,868	)	$	(15,292	)
	Amortization of intangible assets	(6,746		)	(4,752		)	(13,963		)	(9,324		)
	Restructuring and disposal costs associated with the phase out of manufacturing and sale of the U.K. facility	(3,254		)	—			(7,809		)	—
	Loss on asset transfer transaction	—			—			—			(5,042		)
	IPR litigation costs	(1,902		)	(2,775		)	(2,726		)	(3,518		)
	Inventory revaluation resulting from transfer of MBE operations	—			(2,436		)	—			(2,518		)
	Certain consulting expense	(4,800		)	—			(7,000		)	—
	Other expenses (including restructuring, acquisition-related costs, (gain) loss on property and equipment, and start-up costs)	(608		)	36			(1,133		)	(858		)
	Loss from operations for “All other”	$	(27,746	)	$	(19,473	)	$	(52,499	)	$	(36,552	)

Business_Acquisition_and_Dispo

Business Acquisition and Disposition	6 Months Ended
	Sep. 28, 2013
Business Combinations [Abstract]
BUSINESS ACQUISITION AND DISPOSITION	BUSINESS ACQUISITION AND DISPOSITION
	Acquisition
	During the third quarter of fiscal 2013, the Company completed its acquisition of Amalfi Semiconductor, Inc. ("Amalfi") to accelerate the market adoption of Amalfi's RF silicon complementary metal oxide semiconductor (RF CMOS) and mixed-signal integrated circuits (ICs).
	The Company acquired Amalfi for a total purchase price of approximately $48.4 million, net of cash received of $37.6 million (adjusted for preliminary working capital adjustments and holdback reserves). The preliminary allocation of the purchase price reflected in the accompanying financial statements is based upon estimates and assumptions that are subject to change within the measurement period (up to one year from the acquisition date pursuant to ASC 805). The measurement period remains open pending the completion of valuation procedures related to the acquired assets and assumed liabilities.
	As a result of the acquisition of Amalfi, the Company acquired in-process research and development (IPRD). The acquired IPRD enhanced and strengthened the Company's existing 2G product offerings and also enables the Company to offer future high performing, low-cost products compatible with 3G networks. As of September 28, 2013, the acquired IPRD was 70% complete with an estimated completion time of approximately six months and a total remaining cost of approximately $2.0 million to $2.5 million.
	Disposition
	During the second quarter of fiscal 2014, the Company sold its gallium arsenide semiconductor manufacturing facility located in the United Kingdom to Compound Photonics. As a result of this transaction, the Company wrote-off approximately $1.0 million of MPG-related goodwill.

Basis_of_Presentation_and_Sign1

Basis of Presentation and Significant Accounting Policies (Policies)	6 Months Ended
	Sep. 28, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Income Tax Policy	The Company intends to maintain a valuation allowance against its domestic net deferred tax assets until sufficient positive evidence exists to support its full or partial reversal. The amount of the deferred tax assets actually realized could vary depending upon the amount of taxable income the Company is able to generate in the various taxing jurisdictions in which the Company operates.
	The Company’s provision for income taxes for the three and six months ended September 28, 2013 and September 29, 2012 has been calculated by applying an estimate of the annual effective tax rate for the full fiscal year to “ordinary” income or loss (pre-tax income or loss excluding unusual or infrequently occurring discrete items) for the three and six months ended September 28, 2013 and September 29, 2012.
Fair Value Measurements Policy	On a quarterly basis, the Company measures the fair value of its marketable securities, which are comprised of U.S. government/agency securities, auction rate securities (ARS), and money market funds. Marketable securities are reported at fair value in cash and cash equivalents, short-term investments and long-term investments on the Company’s Condensed Consolidated Balance Sheet. The related unrealized gains and losses are included in accumulated other comprehensive loss, a component of shareholders’ equity, net of tax.
Operating Segment Policy	As of September 28, 2013, the Company’s reportable segments are CPG and MPG. CSG does not currently meet the quantitative threshold for an individually reportable segment under ASC 280-10-50-12 and is therefore included in the “Other operating segment” line in the following tables. CPG and MPG are separate reportable segments based on the organizational structure and information reviewed by the Company’s Chief Executive Officer, who is the Company’s chief operating decision maker (or CODM), and are managed separately based on the end markets and applications they support. The CODM allocates resources and assesses the performance of each operating segment primarily based on non-GAAP operating income (loss) and non-GAAP operating income (loss) as a percentage of revenue.

Net_Income_Loss_Per_Share_Tabl

Net Income (Loss) Per Share (Tables)	6 Months Ended
	Sep. 28, 2013
Earnings Per Share [Abstract]
Reconciliation of the numerators and denominators in the computation of basic and diluted net income (loss) per share	The following table sets forth a reconciliation of the numerators and denominators in the computation of basic and diluted net income (loss) per share (in thousands, except per share data):
		Three Months Ended					Six Months Ended
		September 28, 2013		September 29, 2012			September 28, 2013		September 29, 2012
	Numerator:
	Numerator for basic and diluted net income (loss) per share — net income (loss) available to common shareholders	$	5,892	$	(16,456	)	$	7,453	$	(35,595	)
	Denominator:
	Denominator for basic net income (loss) per share — weighted average shares	282,017		278,105			281,403		277,625
	Effect of dilutive securities:
	Share-based awards	5,612		—			5,964		—
	Denominator for diluted net income (loss) per share — adjusted weighted average shares and assumed conversions	287,629		278,105			287,367		277,625
	Basic net income (loss) per share	$	0.02	$	(0.06	)	$	0.03	$	(0.13	)
	Diluted net income (loss) per share	$	0.02	$	(0.06	)	$	0.03	$	(0.13	)

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Sep. 28, 2013
Inventory Disclosure [Abstract]
Components of inventories	Inventories are stated at the lower of cost or market determined using the average cost method. The components of inventories are as follows (in thousands):
		September 28, 2013		March 30, 2013
	Raw materials	$	37,769	$	45,656
	Work in process	53,019		64,108
	Finished goods	53,506		51,429
	Total inventories	$	144,294	$	161,193

Investments_and_Fair_Value_Mea1

Investments and Fair Value Measurements (Tables)	6 Months Ended
	Sep. 28, 2013
Investments and Fair Value Measurements [Abstract]
Available-for-sale securities	The following is a summary of available-for-sale securities as of September 28, 2013 and March 30, 2013 (in thousands):
		Available-for-Sale Securities
		Cost		Gross		Gross			Estimated Fair
				Unrealized		Unrealized			Value
				Gains		Losses
	September 28, 2013
	U.S. government/agency securities	$	47,994	$	5	$	—		$	47,999
	Auction rate securities	2,150		—		—			2,150
	Money market funds	18,344		—		—			18,344
		$	68,488	$	5	$	—		$	68,493
	March 30, 2013
	U.S. government/agency securities	$	77,988	$	3	$	(4	)	$	77,987
	Auction rate securities	2,150		—		—			2,150
	Money market funds	26,328		—		—			26,328
		$	106,466	$	3	$	(4	)	$	106,465
Amortized cost of available-for-sale investments in debt securities with contractual maturities	The amortized cost of available-for-sale investments in debt securities with contractual maturities is as follows (in thousands):
		September 28, 2013				March 30, 2013
		Cost		Estimated		Cost			Estimated
				Fair Value					Fair Value
	Due in less than one year	$	66,338	$	66,343	$	104,316		$	104,315
	Due after ten years	2,150		2,150		2,150			2,150
	Total investments in debt securities	$	68,488	$	68,493	$	106,466		$	106,465
Fair value of the financial assets measured at fair value on a recurring basis	The fair value of the financial assets measured at fair value on a recurring basis was determined using the following levels of inputs as of September 28, 2013 and March 30, 2013 (in thousands):
		Total		Quoted Prices In		Significant Other
				Active Markets For		Observable Inputs
				Identical Assets		(Level 2)
				(Level 1)
	September 28, 2013
	U.S. government/agency securities	$	47,999	$	47,999	$	—
	Auction rate securities	2,150		—		2,150
	Money market funds	18,344		18,344		—
		$	68,493	$	66,343	$	2,150
	March 30, 2013
	U.S. government/agency securities	$	77,987	$	77,987	$	—
	Auction rate securities	2,150		—		2,150
	Money market funds	26,328		26,328		—
		$	106,465	$	104,315	$	2,150

Operating_Segment_Information_

Operating Segment Information (Tables)	6 Months Ended
	Sep. 28, 2013
Segment Reporting [Abstract]
Summary of details of reportable segments	The following tables present details of the Company’s reportable segments and a reconciliation of the “All other” category (in thousands):
		Three Months Ended						Six Months Ended
		September 28,			September 29,			September 28,			September 29,
		2013			2012			2013			2012
	Net revenue:
	CPG	$	255,476		$	160,447		$	493,188		$	313,025
	MPG	55,232			49,224			110,516			99,306
	Other operating segment	8			—			8			—
	Total net revenue	$	310,716		$	209,671		$	603,712		$	412,331
	Income (loss) from operations:
	CPG	$	29,082		$	7,204		$	51,032		$	10,460
	MPG	8,871			2,774			15,731			4,339
	Other operating segment	(751		)	(655		)	(1,573		)	(1,264		)
	All other	(27,746		)	(19,473		)	(52,499		)	(36,552		)
	Income (loss) from operations	9,456			(10,150		)	12,691			(23,017		)
	Interest expense	(1,403		)	(1,644		)	(2,912		)	(3,718		)
	Interest income	41			64			82			143
	Loss on retirement of convertible subordinated notes	—			(2,034		)	—			(2,756		)
	Other income (expense)	363			617			771			(121		)
	Income (loss) before income taxes	$	8,457		$	(13,147	)	$	10,632		$	(29,469	)
Summary of reconciliation of "All other" category
		Three Months Ended						Six Months Ended
		September 28,			September 29,			September 28,			September 29,
		2013			2012			2013			2012
	Reconciliation of “All other” category:
	Share-based compensation expense	$	(10,436	)	$	(9,546	)	$	(19,868	)	$	(15,292	)
	Amortization of intangible assets	(6,746		)	(4,752		)	(13,963		)	(9,324		)
	Restructuring and disposal costs associated with the phase out of manufacturing and sale of the U.K. facility	(3,254		)	—			(7,809		)	—
	Loss on asset transfer transaction	—			—			—			(5,042		)
	IPR litigation costs	(1,902		)	(2,775		)	(2,726		)	(3,518		)
	Inventory revaluation resulting from transfer of MBE operations	—			(2,436		)	—			(2,518		)
	Certain consulting expense	(4,800		)	—			(7,000		)	—
	Other expenses (including restructuring, acquisition-related costs, (gain) loss on property and equipment, and start-up costs)	(608		)	36			(1,133		)	(858		)
	Loss from operations for “All other”	$	(27,746	)	$	(19,473	)	$	(52,499	)	$	(36,552	)

Net_Income_Loss_Per_Share_Deta

Net Income (Loss) Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Numerator:
Numerator for basic and diluted net income (loss) per share — net income (loss) available to common shareholders	$5,892	($16,456)	$7,453	($35,595)
Denominator:
Denominator for basic net income (loss) per share — weighted average shares	282,017	278,105	281,403	277,625
Effect of dilutive securities:
Share-based awards	5,612	0	5,964	0
Denominator for diluted net income (loss) per share — adjusted weighted average shares and assumed conversions	287,629	278,105	287,367	277,625
Basic net income (loss) per share (in dollars per share)	$0.02	($0.06)	$0.03	($0.13)
Diluted net income (loss) per share (in dollars per share)	$0.02	($0.06)	$0.03	($0.13)

Net_Income_Loss_Per_Share_Deta1

Net Income (Loss) Per Share (Details Textual) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended		60 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Jun. 30, 2012	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013
					Convertible Notes Due 2012 [Member]	Convertible Notes Due 2012 [Member]	Convertible Notes Due 2014 [Member]	Convertible Notes Due 2014 [Member]	Convertible Notes Due 2014 [Member]	Convertible Notes Due 2014 [Member]
Net Income (Loss) Per Share (Textual)
Approximate number of shares excluded from the computation of diluted shares outstanding	8,200,000		8,500,000
Initial aggregate principal amount of Notes issued						$200,000,000		$175,000,000		$175,000,000
Interest rate on Convertible Subordinated Notes						0.75%		1.00%		1.00%
Maturity date of the Convertible Notes						15-Apr-12		15-Apr-14
Remaining principal balance of 2012 notes, repaid					26,500,000
Approximate average market price per share of the Company's common stock to be exceeded to make Notes dilutive to earnings								$8.05
Maximum number of shares issuable upon conversion of the 2014 Notes								8,400,000		8,400,000
Extinguishment of debt, principal amount							$32,000,000		$47,400,000	$87,500,000
Shares repurchased during period	2,400,000	0	2,400,000	1,900,000
Shares acquired average cost per share	$5.03		$5.03	$3.75

Inventories_Details

Inventories (Details) (USD $)	Sep. 28, 2013	Mar. 30, 2013
In Thousands, unless otherwise specified
Components of inventories
Raw materials	$37,769	$45,656
Work in process	53,019	64,108
Finished goods	53,506	51,429
Total inventories	$144,294	$161,193

Debt_Details_Textual

Debt (Details Textual) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

60 Months Ended

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Sep. 29, 2012

Sep. 28, 2013

Sep. 29, 2012

Sep. 28, 2013

Mar. 30, 2013

Sep. 28, 2013

Mar. 30, 2013

Sep. 28, 2013

Sep. 28, 2013

Sep. 28, 2013

Sep. 28, 2013

Convertible Notes Due 2014 [Member]

Convertible Notes Due 2014 [Member]

Convertible Notes Due 2014 [Member]

Convertible Notes Due 2014 [Member]

Convertible Notes Due 2014 [Member]

Convertible Notes Due 2014 [Member]

Convertible Notes Due 2014 [Member]

Credit Agreement [Member]

Revolving Credit Facility [Member]

Standby Letters of Credit [Member]

Swingline Loan [Member]

Private Offerings, Resale and Trading through Automated Linkages [Member]

Private Offerings, Resale and Trading through Automated Linkages [Member]

Debt (Textual)

Maturity date of the Convertible Notes

15-Apr-14

Convertible subordinated notes carrying value

$84,600,000

$84,600,000

$82,000,000

Extinguishment of debt, principal amount

32,000,000

47,400,000

87,500,000

Debt Instrument Average Price Per Share

$98.33

$98.34

Loss on retirement of convertible subordinated notes

0

-2,034,000

0

-2,756,000

-2,000,000

-2,800,000

Fair value of convertible notes

88,600,000

86,700,000

Line of Credit Facility, Maximum Borrowing Capacity

125,000,000

5,000,000

5,000,000

Line of Credit Facility, Maximum amount of increase that may be requested

50,000,000

Line of Credit Facility, Amount Outstanding

$0

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012	Mar. 30, 2013
Income Taxes [Abstract]
Income tax expense	$2,565,000	$3,309,000	$3,179,000	$6,126,000
Effective tax rate	30.30%	-25.20%	29.90%	-20.80%
Decrease in valuation allowance against net deferred tax assets			-7,600,000
Valuation allowance against net deferred tax assets					164,200,000
Gross unrecognized tax benefits	38,500,000		38,500,000		37,900,000
Change in unrecognized tax benefits arising from increase related to current period tax positions			$600,000

Investments_and_Fair_Value_Mea2

Investments and Fair Value Measurements (Details) (USD $)	Sep. 28, 2013	Mar. 30, 2013
In Thousands, unless otherwise specified
Available-for-Sale securities
Cost	$68,488	$106,466
Gross Unrealized Gains	5	3
Gross Unrealized Losses	0	-4
Estimated fair value	68,493	106,465
U.S. government/agency securities [Member]
Available-for-Sale securities
Cost	47,994	77,988
Gross Unrealized Gains	5	3
Gross Unrealized Losses	0	-4
Estimated fair value	47,999	77,987
Auction Rate Securities [Member]
Available-for-Sale securities
Cost	2,150	2,150
Estimated fair value	2,150	2,150
Money Market Funds [Member]
Available-for-Sale securities
Cost	18,344	26,328
Estimated fair value	$18,344	$26,328

Investments_and_Fair_Value_Mea3

Investments and Fair Value Measurements (Details 1) (USD $)	Sep. 28, 2013	Mar. 30, 2013
In Thousands, unless otherwise specified
Amortized cost of available-for-sale investments in debt securities with contractual maturities
Cost of investments in debt securities due in less than one year	$66,338	$104,316
Cost of investments in debt securities due after ten years	2,150	2,150
Total cost of investments in debt securities	68,488	106,466
Estimated fair value of investments in debt securities due in less than one year	66,343	104,315
Estimated fair value of investments in debt securities due after ten years	2,150	2,150
Estimated fair value	$68,493	$106,465

Investments_and_Fair_Value_Mea4

Investments and Fair Value Measurements (Details 2) (USD $)	Sep. 28, 2013	Mar. 30, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	$68,493	$106,465
Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	68,493	106,465
Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	66,343	104,315
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	2,150	2,150
U.S. government/agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	47,999	77,987
U.S. government/agency securities [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	47,999	77,987
U.S. government/agency securities [Member] | Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	47,999	77,987
Auction Rate Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	2,150	2,150
Auction Rate Securities [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	2,150	2,150
Auction Rate Securities [Member] | Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	2,150	2,150
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	18,344	26,328
Money Market Funds [Member] | Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	18,344	26,328
Money Market Funds [Member] | Recurring [Member] | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Fair value of financial assets measured at fair value on a recurring basis	$18,344	$26,328

Investments_and_Fair_Value_Mea5

Investments and Fair Value Measurements (Details Textual) (USD $)	3 Months Ended		12 Months Ended	3 Months Ended
	Sep. 28, 2013	Mar. 30, 2013	Mar. 30, 2013	Jun. 29, 2013
			U.S. government/agency securities [Member]	Fair Value, Inputs, Level 3 [Member]
				Fair Value, Measurements, Nonrecurring [Member]
Investments and Fair Value Measurements (Textual)
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses [Less Than]			$100,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0		14,000,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Impairment of certain property and equipment				1,700,000
Fair value of certain property and equipment				800,000
Loss on the sale of certain property and equipment	$600,000

Operating_Segment_Information_1

Operating Segment Information (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Net revenue:
Net revenue	$310,716	$209,671	$603,712	$412,331
Income (loss) from operations:
Income (loss) from operations	9,456	-10,150	12,691	-23,017
Interest expense	-1,403	-1,644	-2,912	-3,718
Interest income	41	64	82	143
Loss on retirement of convertible subordinated notes	0	-2,034	0	-2,756
Other income (expense)	363	617	771	-121
Income (loss) before income taxes	8,457	-13,147	10,632	-29,469
CPG [Member]
Net revenue:
Net revenue	255,476	160,447	493,188	313,025
Income (loss) from operations:
Income (loss) from operations	29,082	7,204	51,032	10,460
MPG [Member]
Net revenue:
Net revenue	55,232	49,224	110,516	99,306
Income (loss) from operations:
Income (loss) from operations	8,871	2,774	15,731	4,339
Other operating segment [Member]
Net revenue:
Net revenue	8	0	8	0
Income (loss) from operations:
Income (loss) from operations	-751	-655	-1,573	-1,264
All other [Member]
Income (loss) from operations:
Income (loss) from operations	($27,746)	($19,473)	($52,499)	($36,552)

Operating_Segment_Information_2

Operating Segment Information (Details 1) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Reconciliation of "All other" category:
Share-based compensation expense			($19,868)	($15,292)
Income (loss) from operations	9,456	-10,150	12,691	-23,017
All other [Member]
Reconciliation of "All other" category:
Share-based compensation expense	-10,436	-9,546	-19,868	-15,292
Amortization of intangible assets	-6,746	-4,752	-13,963	-9,324
Restructuring and disposal costs associated with the phase out of manufacturing and sale of the U.K. facility	-3,254	0	-7,809	0
Loss on asset transfer transaction	0	0	0	-5,042
IPR litigation costs	-1,902	-2,775	-2,726	-3,518
Inventory revaluation resulting from transfer of MBE operations	0	-2,436	0	-2,518
Certain consulting expense	-4,800	0	-7,000	0
Other expenses (including restructuring, acquisition-related costs, (gain) loss on property and equipment, and start-up costs)	-608	36	-1,133	-858
Income (loss) from operations	($27,746)	($19,473)	($52,499)	($36,552)

Business_Acquisition_and_Dispo1

Business Acquisition and Disposition (Details Textual) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Sep. 28, 2013	Nov. 09, 2012	Sep. 28, 2013
		Amalfi [Member]	In-process research and development [Member]
			Amalfi [Member]
Business Acquisition and Disposition [Line Items]
Purchase price net of cash received and working capital adjustments		$48.40
Cash received in acquisition		37.6
Acquired In-Process Research and Development percentage complete			70.00%
In-Process research and development estimated completion period			6 months
Lower Range of The Remaining Research and Development Costs to Complete			2
Higher Range of The Remaining Research and Development Costs to Complete			2.5
Goodwill, Written off Related to Sale of Business	$1