PMC Sierra (PMCS) 10-Q 12 Nov 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Sep. 28, 2013	Nov. 05, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	28-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'pmcs	'
Entity Registrant Name	'PMC SIERRA INC	'
Entity Central Index Key	'0000767920	'
Current Fiscal Year End Date	'--12-28	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	203,297,770

Condensed_Consolidated_Stateme

Condensed Consolidated Statements Of Operations (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 28, 2013		Sep. 30, 2012		Sep. 28, 2013		Sep. 30, 2012
Condensed Consolidated Statements Of Operations [Abstract]	'		'		'		'
Net revenues	$128,855		$131,723	[1]	$381,923		$401,579	[1]
Cost of revenues	37,194		38,990	[1]	112,281		121,255	[1]
Gross profit	91,661		92,733	[1]	269,642		280,324	[1]
Other costs and expenses:	'		'		'		'
Research and development	50,733		55,604	[1]	157,038		171,374	[1]
Selling, general and administrative	26,383		27,786	[1]	85,002		86,047	[1]
Amortization of purchased intangible assets	13,138		11,624	[1]	34,698		34,537	[1]
Impairment of goodwill and purchased intangible assets	'		274,637	[1]	'		274,637	[1]
Income (loss) from operations	1,407		-276,918	[1]	-7,096		-286,271	[1]
Other income (expense):	'		'		'		'
Gain on investment securities and other investments	1,762		180	[1]	1,776		746	[1]
Amortization of debt issue costs	'		-50	[1]	'		-150	[1]
Foreign exchange (loss) gain	-1,898		-2,454	[1]	1,680		-1,951	[1]
Interest income (expense), net	200		-797	[1]	794		-1,539	[1]
Income (loss) before (provision for) recovery of income	1,471		-280,039	[1]	-2,846		-289,165	[1]
(Provision for) benefit from recovery of income taxes	-4,195		5,515	[1]	-12,961		-49,790	[1]
Net loss	($2,724)	[1]	($274,524)	[1]	($15,807)	[1]	($338,955)	[1]
Net loss per common share - basic	($0.01)		($1.31)	[1]	($0.08)		($1.53)	[1]
Net loss per common share - diluted	($0.01)		($1.31)	[1]	($0.08)		($1.53)	[1]
Shares used in per share calculation - basic	205,377	[2]	209,512	[1],[2]	204,269	[2]	221,323	[1],[2]
Shares used in per share calculation - diluted	205,377	[2]	209,512	[1],[2]	204,269	[2]	221,323	[1],[2]
[1]	As Restated
[2]	PMC-Sierra Ltd. special shares are included in the calculation of basic and diluted weighted average common shares outstanding.

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements Of Comprehensive Loss (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013		Sep. 30, 2012		Sep. 28, 2013		Sep. 30, 2012
Condensed Consolidated Statements Of Comprehensive Loss [Abstract]	'		'		'		'
Net loss	($2,724)	[1]	($274,524)	[1]	($15,807)	[1]	($338,955)	[1]
Change in fair value of derivatives, net of tax of $214, $61, $48 and $289	637		624	[1]	-311		1,704	[1]
Change in fair value of investment securities, net of tax of $71, $166, ($153) and $267	202		262	[1]	-246		209	[1]
Other comprehensive (loss) income	839		886	[1]	-557		1,913	[1]
Comprehensive loss	($1,885)	[1]	($273,638)	[1]	($16,364)	[1]	($337,042)	[1]
[1]	As Restated

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements Of Comprehensive Loss (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012
Condensed Consolidated Statements Of Comprehensive Loss [Abstract]	'	'	'	'
Change in fair value of derivatives, deferred tax expense (benefit)	$214	$61	($48)	$289
Change in fair value of investment securities, deferred tax expense (benefit)".	$71	$166	($153)	$267

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 28, 2013		Dec. 29, 2012
In Thousands, unless otherwise specified
Current assets:	'		'
Cash and cash equivalents	$87,019		$169,970	[1]
Short-term investments	13,670		11,431	[1]
Accounts receivable, net of allowance for doubtful accounts of $1,157 (2012 - $1,614)	60,948		62,143	[1]
Inventories, net	32,024		23,548	[1]
Prepaid expenses and other current assets	20,030		22,125	[1]
Income taxes receivable	2,417		6,630	[1]
Prepaid tax expense	7,594		'
Deferred tax assets	52,671		43,630	[1]
Total current assets	276,373		339,477	[1]
Investment securities	109,359		91,778	[1]
Investments and other assets	13,379		20,133	[1]
Prepaid expenses	1,538		19,152	[1]
Property and equipment, net	40,240		43,146	[1]
Goodwill	279,055		252,419	[1]
Intangible assets, net	160,346		128,668	[1]
Deferred tax assets	145		'
Assets, Total	880,435		894,773	[1]
Current liabilities:	'		'
Accounts payable	20,950		27,410	[1]
Accrued liabilities	61,893		72,282	[1]
Income taxes payable	704		1,450	[1]
Liability for unrecognized tax benefit	54,607		51,810	[1]
Deferred income taxes	2,514		2,466	[1]
Deferred income	7,198		8,113	[1]
Total current liabilities	147,866		163,531	[1]
Long-term obligations	10,886		17,233	[1]
Deferred income taxes	44,752		41,936	[1]
Liability for unrecognized tax benefit	34,886		34,957	[1]
PMC special shares convertible into 1,019 (2012 - 1,019) shares of common stock	1,188		1,188	[1]
Stockholders' equity:	'		'
Common stock, par value $.001: 900,000 shares authorized; 203,420 shares issued and outstanding (2012 - 200,924)	203		201	[1]
Additional paid in capital	1,581,860		1,552,936	[1]
Accumulated other comprehensive (loss) income	59		616	[1]
Accumulated deficit	-941,265		-917,825	[1]
Total stockholders' equity	640,857	[1]	635,928	[1]
Liabilities and Stockholders' Equity, Total	$880,435		$894,773	[1]
[1]	As Restated

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 28, 2013	Dec. 29, 2012
In Thousands, except Share data, unless otherwise specified
Condensed Consolidated Balance Sheets [Abstract]	'	'
Accounts receivable, allowance for doubtful accounts	$1,157	$1,614
PMC special shares convertible into common stock, shares	1,019,000	1,019,000
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	900,000	900,000
Common stock, shares issued	203,420,000	200,924,000
Common stock, shares outstanding	203,420,000	200,924,000

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements Of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013		Sep. 30, 2012
Cash flows from operating activities:	'		'
Net loss	($15,807)	[1]	($338,955)	[1]
Adjustments to reconcile net loss to net cash provided by operating activities:	'		'
Depreciation and amortization	51,731		48,724	[1]
Stock-based compensation	19,461		19,978	[1]
Unrealized foreign exchange gain, net	-6,106		2,299	[1]
Net amortization of premiums/discounts and accrued interest of investments	1,353		3,844	[1]
Gain on investment securities and other investments	-1,767		-731	[1]
Impairment of goodwill and purchased intangible assets	'		274,637	[1]
Other asset impairment	'		1,158	[1]
Taxes related to intercompany dividend	'		60,940	[1]
Excess tax benefits from stock option transactions	-2,274		-18,226	[1]
Changes in operating assets and liabilities:	'		'
Accounts receivable	1,156		-3,352	[1]
Inventories	-6,693		12,506	[1]
Prepaid expenses and other current assets	927		4,108	[1]
Accounts payable and accrued liabilities	-8,614		-27,643	[1]
Deferred income taxes and income taxes receivables / payables	10,702		-9,524	[1]
Deferred income	-915		-3,304	[1]
Net cash provided by operating activities	43,154		26,459	[1]
Cash flows from investing activities:	'		'
Investment in long term deposits	-1,127		'
Business acquisition, net of cash acquired	-96,098		-15,900	[1]
Purchases of property and equipment	-11,297		-25,558	[1]
Purchase of intangible assets	-2,048		-4,602	[1]
Redemption of short-term investments	8,466		11,415	[1]
Disposals of investment securities, and other investments	146,340		182,488	[1]
Purchases of investment securities and other investments	-172,114		-87,267	[1]
Net cash (used in) provided by investing activities	-127,878		60,576	[1]
Cash flows from financing activities:	'		'
Repurchases of common stock	-22,544		-180,807	[1]
Equity forward contract related to accelerated share repurchase program	'		-9,827	[1]
Payment of debt issuance costs	-928		'
Proceeds from issuance of common stock	23,476		15,869	[1]
Excess tax benefits from stock option transactions	2,274		18,226	[1]
Net cash provided by (used in) financing activities	2,278		-156,539	[1]
Effect of exchange rate changes on cash and cash equivalents	-505		152	[1]
Net decrease in cash and cash equivalents	-82,951		-69,352	[1]
Cash and cash equivalents, beginning of period	169,970	[1]	182,571	[1]
Cash and cash equivalents, end of period	87,019		113,219	[1]
Supplemental disclosures of cash flow information:	'		'
Cash refund received (payments made) on income taxes, net	$1,432		($1,595)	[1]
[1]	As Restated

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements Of Stockholders' Equity (USD $)		Common Stock [Member]	Additional Paid In Capital [Member]		Accumulated Other Comprehensive Income (Loss) (Net Of Tax) [Member]	Accumulated Deficit [Member]		Total
In Thousands, except Share data, unless otherwise specified
Beginning Balance at Dec. 31, 2011		$230	$1,623,006	[1]	($1,146)	($515,623)	[1]	$1,106,467	[1]
Beginning Balance (in shares) at Dec. 31, 2011		230,233,000	'		'	'		'
Net loss	[1]	'	'		'	-338,955		-338,955
Other comprehensive income (loss):		'	'		'	'		'
Change in fair value of derivatives, net of tax		'	'		1,704	'		1,704	[1]
Change in fair value of investment securities, net of tax		'	'		209	'		209	[1]
Comprehensive income (loss)	[1]	'	'		'	'		-337,042
Issuance of common stock under stock benefit plans		4	14,991	[1]	'	'		14,995	[1]
Issuance of common stock under stock benefit plans (in shares)		4,328,000	'		'	'		'
Stock-based compensation expense	[1]	'	19,978		'	'		19,978
Benefit of stock option related loss carry-forwards	[1]	'	18,226		'	'		18,226
Repurchases of common stock		-27	-114,560	[1]	'	-66,220	[1]	-180,807	[1]
Repurchases of common stock (in shares)		-27,395,000	'		'	'		'
Equity forward contract related to accelerated share repurchase program	[1]	'	-9,827		'	'		-9,827
Ending Balance at Sep. 30, 2012		207	1,551,814	[1]	767	-920,798	[1]	631,990	[1]
Ending Balance (in shares) at Sep. 30, 2012		207,166,000	'		'	'		'
Beginning Balance at Jul. 01, 2012		210	1,558,560	[1]	-119	-639,112	[1]	919,539	[1]
Beginning Balance (in shares) at Jul. 01, 2012		209,790,000	'		'	'		'
Net loss	[1]	'	'		'	-274,524		-274,524
Other comprehensive income (loss):		'	'		'	'		'
Change in fair value of derivatives, net of tax		'	'		624	'		624	[1]
Change in fair value of investment securities, net of tax		'	'		262	'		262	[1]
Comprehensive income (loss)	[1]	'	'		'	'		-273,638
Issuance of common stock under stock benefit plans		1	6,814	[1]	'	'		6,815	[1]
Issuance of common stock under stock benefit plans (in shares)		1,657,000	'		'	'		'
Stock-based compensation expense	[1]	'	6,088		'	'		6,088
Benefit of stock option related loss carry-forwards	[1]	'	-1,790		'	'		-1,790
Repurchases of common stock		-4	-17,858	[1]	'	-7,162	[1]	-25,024	[1]
Repurchases of common stock (in shares)		-4,281,000	'		'	'		'
Ending Balance at Sep. 30, 2012		207	1,551,814	[1]	767	-920,798	[1]	631,990	[1]
Ending Balance (in shares) at Sep. 30, 2012		207,166,000	'		'	'		'
Beginning Balance at Dec. 29, 2012		201	1,552,936	[1]	616	-917,825	[1]	635,928	[1]
Beginning Balance (in shares) at Dec. 29, 2012		200,924,000	'		'	'		200,924,000
Net loss	[1]	'	'		'	-15,807		-15,807
Other comprehensive income (loss):		'	'		'	'		'
Change in fair value of derivatives, net of tax		'	'		-311	'		-311	[1]
Change in fair value of investment securities, net of tax		'	'		-246	'		-246	[1]
Comprehensive income (loss)	[1]	'	'		'	'		-16,364
Issuance of common stock under stock benefit plans		5	21,804	[1]	'	'		21,809	[1]
Issuance of common stock under stock benefit plans (in shares)		6,090,000	'		'	'		'
Stock-based compensation expense	[1]	'	19,461		'	'		19,461
Benefit of stock option related loss carry-forwards	[1]	'	2,626		'	'		2,626
Repurchases of common stock		-3	-14,967	[1]	'	-7,633	[1]	-22,603	[1]
Repurchases of common stock (in shares)		-3,594,000	'		'	'		'
Ending Balance at Sep. 28, 2013		203	1,581,860	[1]	59	-941,265	[1]	640,857	[1]
Ending Balance (in shares) at Sep. 28, 2013		203,420,000	'		'	'		203,420,000
Beginning Balance at Jun. 29, 2013		204	1,578,962	[1]	-780	-932,656	[1]	645,730	[1]
Beginning Balance (in shares) at Jun. 29, 2013		204,145,000	'		'	'		'
Net loss	[1]	'	'		'	-2,724		-2,724
Other comprehensive income (loss):		'	'		'	'		'
Change in fair value of derivatives, net of tax		'	'		637	'		637	[1]
Change in fair value of investment securities, net of tax		'	'		202	'		202	[1]
Comprehensive income (loss)	[1]	'	'		'	'		-1,885
Issuance of common stock under stock benefit plans		1	6,458	[1]	'	'		6,459	[1]
Issuance of common stock under stock benefit plans (in shares)		1,966,000	'		'	'		'
Stock-based compensation expense	[1]	'	5,874		'	'		5,874
Benefit of stock option related loss carry-forwards	[1]	'	1,775		'	'		1,775
Repurchases of common stock		-2	-11,209	[1]	'	-5,885	[1]	-17,096	[1]
Repurchases of common stock (in shares)		-2,691,000	'		'	'		'
Ending Balance at Sep. 28, 2013		$203	$1,581,860	[1]	$59	($941,265)	[1]	$640,857	[1]
Ending Balance (in shares) at Sep. 28, 2013		203,420,000	'		'	'		203,420,000
[1]	As Restated

Condensed_Consolidated_Stateme5

Condensed Consolidated Statements Of Stockholders' Equity (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012
Condensed Consolidated Statements Of Stockholders' Equity [Abstract]	'	'	'	'
Change in fair value of derivatives, deferred tax expense (benefit)	$214	$61	($48)	$289
Change in fair value of investment securities, deferred tax expense (benefit)	$71	$166	($153)	$267

Summary_Of_Significant_Account

Summary Of Significant Accounting Policies	9 Months Ended
	Sep. 28, 2013
Summary Of Significant Accounting Policies [Abstract]	'
Summary Of Significant Accounting Policies	'
	NOTE 1.  Summary of Significant Accounting Policies
	Description of business.  PMC-Sierra, Inc. (the “Company” or “PMC”) is a semiconductor innovator transforming networks that connect, move and store digital content. Building on a track record of technology leadership, the Company is driving innovation across storage, optical and mobile networks.  PMC’s highly integrated solutions increase performance and enable next generation services to accelerate the network transformation.
	Basis of presentation. The accompanying interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”) and United States Generally Accepted Accounting Principles (“GAAP”).  Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules or regulations.  These interim condensed consolidated financial statements are unaudited, but reflect all adjustments which are normal and recurring in nature and are, in the opinion of management, necessary to provide a fair statement of results for the interim periods presented.  These interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes in the Company’s Annual Report on Form 10-K/A for the year ended December 29, 2012 filed with the Securities and Exchange Commission on November 8, 2013.  Financial information presented for periods prior to the three months ended September 28, 2013 has been restated – see Note 11.  The results of operations for the interim periods are not necessarily indicative of results to be expected in future periods. Fiscal 2013 will consist of 52 weeks and will end on Saturday, December 28, 2013.  Fiscal 2012 consisted of 52 weeks and ended on Saturday, December 29, 2012.  The third quarter of each of 2013 and 2012 consisted of 13 weeks.  The Company’s reporting currency is the U.S. dollar and presented in thousands unless otherwise stated.
	Estimates. The preparation of financial statements and related disclosures in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes.  Estimates are used for, but not limited to, stock-based compensation, purchase accounting assumptions including those used to calculate the fair value of intangible assets and goodwill, the valuation of investments, accounting for doubtful accounts, inventory reserves, depreciation and amortization, asset impairments, revenue recognition, sales returns, warranty costs, income taxes including uncertain tax positions, restructuring costs, assumptions used to measure the fair value of the debt component of our senior convertible notes, accounting for employee benefit plans, and contingencies.  Actual results could differ materially from these estimates.

Business_Combinations

Business Combinations	9 Months Ended
	Sep. 28, 2013
Business Combinations [Abstract]	'
Business Combinations	'
	NOTE 2. Business Combinations
	Acquisition of Integrated Device Technology, Inc’s Enterprise Flash Controller Business
	On July 12, 2013, PMC completed the acquisition of (i) substantially all of the assets used by Integrated Device Technology, Inc., a Delaware corporation (“Seller”), and its subsidiaries, in the business of designing, developing, manufacturing, testing, marketing, supporting, maintaining, distributing, provisioning and selling non-volatile memory (flash) controllers and (ii) all technology and intellectual property rights owned by Seller or any of its subsidiaries and used exclusively in, or developed exclusively for use in, (a) switching circuits having the primary function of flexible routing of data from/to multiple switch interface ports, where all switch interface ports conform to the PCIe protocol, or (b) circuits having the primary function of executing all of the capturing, re-timing, re-generating and re-transmitting PCIe signals to help extend the physical reach of the signals in a system (the “Acquisition”), pursuant to the Asset Purchase Agreement with Seller and Integrated Device Technology (Malaysia) Sdn. Bhd., a wholly-owned subsidiary of Seller (“Selling Subsidiary” and, together with PMC, PMC’s subsidiaries and Seller, the “Parties”) dated May 29, 2013.    The Parties also entered into a license agreement, effective upon the closing of the Acquisition, whereby Seller and Selling Subsidiary will license certain intellectual property rights and technology to PMC, and PMC will license back to Seller and Selling Subsidiary certain of the intellectual property rights and technology acquired by PMC in the Acquisition. Upon the closing of the Acquisition, the Parties also entered into (a) a transition services agreement and (b) a supply agreement, whereby Seller and Selling Subsidiary provide services to PMC at the option of PMC.
	PMC’s completion of the Acquisition accelerates the Company’s product offering in the Enterprise Flash Controller and PCI Express Switch businesses, including the world’s first NVM Express (NVMe) flash controller.
	Preliminary purchase price
	The total preliminary fair value of consideration paid for the Acquisition was approximately $96,098 in cash funded by PMC’s available working capital.
	Acquisition-related costs of approximately $2 million were expensed as incurred in 2013 and are included in selling, general and administrative expense.
	Preliminary purchase price allocations
	The purchase of the IDT assets was accounted for using the acquisition method, and the allocation of fair value of consideration paid to the estimated fair value of related assets acquired and liabilities assumed as of the date of the Acquisition in the table below reflect various preliminary estimates and analyses, including preliminary work performed by third-party valuation specialists, and are subject to change as valuations are finalized.
	Current assets	$	2,210
	Intangible assets		67,400
	Goodwill		26,643
	Total asset		96,253
	Assumed liabilities		-155
	Total preliminary purchase price	$	96,098
	Of the total purchase price, a preliminary estimate of approximately $67,400 has been allocated to amortizable intangible assets acquired and a preliminary estimate of approximately $155 has been allocated to net liabilities assumed in connection with the acquisition. The amortizable intangible assets are being amortized on a straight line basis over their estimated useful lives as follows:
			Estimated fair value	Weighted average useful life
	Order backlog	$	100	< 1 year
	Existing technology		700	2 years
	Customer relationships		3,400	7 years
	Core technology		63,200	7 years
	Total intangible assets	$	67,400
	Acquired Intangible Assets
	The existing and core technologies include patents, business processes and tools, and proprietary business methods. In addition to the current products, the acquired developed technologies can be leveraged to assist and improve existing services and create future generation products.  The valuation assumptions included information on revenues from existing products and future expected trends for each technology, with an estimated useful life of between two and seven years.  Management applied discount rates of 14% and 16% respectively to value the existing and core technology assets, which took into consideration market rates of return on debt and equity capital and the risk associated with achieving forecasted revenues related to these assets.
	Customer relationships assets relate primarily to underlying customer relationships. The preliminary estimated fair value of the customer relationships represents the sum of the present value of the expected cash flows attributable to those customer relationships. The cash flows were determined from the revenue and profit forecasts associated with growth opportunities that are expected to be generated from these customer relationships. The Company used the same method to determine the fair value of this intangible asset as the developed technologies and utilized a discount rate of 16%.
	Goodwill
	The Company’s primary reasons for the Acquisition was to accelerate the Company’s time-to-market with early product leadership and a robust design win pipeline, including wins spanning tier one datacenter, original equipment manufacturer (OEM), and solid-state drive (SSD) customers.  The Acquisition also enhanced the Company’s engineering team through the addition of research and development resources.  These factors were the basis for the recognition of goodwill. The goodwill is expected to be deductible for tax purposes over 15 years.
	Proforma disclosures
	The Acquisition did not have a significant impact on PMC’s net revenues or net earnings (loss) for the periods where pro forma disclosures would be required.  Net revenues for the third quarter of 2013 from the Acquisition date was $1.4 million and net loss for the same period was $4.3 million.  Included in net loss was $2.4 million related to amortization of purchased intangible assets, $0.8 million of fair value adjustments on acquired inventory, and $0.7 million of payroll accruals.
	Acquisition of 12GB/s SAS expander business from Maxim Integrated Products, Inc.
	During the first quarter of fiscal 2012, the Company completed the acquisition of the 12Gb/s Serial attached SCSI (“SAS”) expander business from Maxim Integrated Products, Inc. (“Maxim”).  Along with a very experienced team, this acquisition provides a strong strategic fit between PMC’s core strengths in enterprise storage and Maxim’s established traction with expander solutions at the largest server storage original equipment manufacturers.  This acquisition was accounted for under the acquisition method of accounting.  The financial impact of the acquisition was not material to the Company.

Derivative_Instruments

Derivative Instruments	9 Months Ended
	Sep. 28, 2013
Derivative Instruments [Abstract]	'
Derivative Instruments	'
	NOTE 3.  Derivative Instruments
	The Company generates revenues in U.S. dollars but incurs a portion of its operating expenses in foreign currencies, primarily the Canadian dollar.  To minimize the short-term impact of foreign currency fluctuations on the Company’s operating expenses, the Company purchases forward currency contracts.
	As at September 28, 2013, the Company had 36 forward currency contracts (December 29, 2012 - 73) outstanding, all with maturities of less than 12 months, which qualified and were designated as cash flow hedges.  The U.S. dollar notional amount of these contracts was $30.5 million (December 29, 2012  - $22.5 million) and the contracts had a fair value loss of $0.3 million (September 30, 2012 – fair value gain of $1.7 million), which was recorded in Accumulated other comprehensive income (loss) net of taxes of $nil million for the nine months ended September 28, 2013 (net of taxes of $0.3 million for the nine months ended September 30, 2012).

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 28, 2013
Fair Value Measurements [Abstract]	'
Fair Value Measurements	'
	NOTE 4.  Fair Value Measurements
	ASC Topic 820 specifies a hierarchy of valuation techniques which requires an entity to maximize the use of observable inputs that may be used to measure fair value.  The Company’s valuation techniques used to measure the fair value of money market funds, and certain marketable equity securities were derived from quoted prices in active markets for identical assets or liabilities. The valuation techniques used to measure the fair value of all other financial instruments, all of which have counterparties with high credit ratings, were valued based on quoted market prices or model driven valuations using significant inputs derived from or corroborated by observable market data.
	There were $14.9 million transfers in and out of Level 1 and 2 fair value measurements during the three and nine months ended September 28, 2013.
	Assets/Liabilities Measured and Recorded at Fair Value on a Recurring Basis
	Financial assets measured on a recurring basis as at September 28, 2013 and December 29, 2012, are summarized below:
		Fair value,
		28-Sep-13
	(in thousands)	Level 1		Level 2
	Assets:
	Corporate bonds and notes (1)	$	73,914	$	14,924
	Money market funds (1)		14,407		-
	United States (“US”) treasury and government agency notes (1)		31,899		-
	Foreign government and agency notes (1)		1,648		-
	US state and municipal securities (1)		644		-
	Forward currency contracts (2)		-		129
	Total assets	$	122,512	$	15,053
		Fair value,
		29-Dec-12
	(in thousands)	Level 1		Level 2
	Assets:
	Corporate bonds and notes (1)	$	63,565	$	-
	Money market funds (1)		50,528		-
	US treasury and government agency notes (1)		33,854		-
	Foreign government and agency notes (1)		4,044		-
	US state and municipal securities (1)		1,746		-
	Forward currency contracts (2)		-		392
	Total assets	$	153,737	$	392
	(1)  Included in Cash and cash equivalents, Short-term investments, and Long-term investment securities.  See Note 7. Investment Securities.
	(2)  Included in Prepaid expenses and other current assets.
	There are no financial liabilities measured at fair value on a recurring basis.

StockBased_Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 28, 2013
Stock-Based Compensation [Abstract]	'
Stock-Based Compensation	'
	NOTE 5.   Stock-Based Compensation
	The Company has two stock-based compensation programs, which are described below.  None of the Company’s stock-based awards under these plans are classified as liabilities.  The Company did not capitalize any stock-based compensation cost and recorded compensation expense for the three and nine months ended September 28, 2013 and September 30, 2012 are as follows:
		Three Months Ended				Nine Months Ended
		September 28,		September 30,		September 28,			September 30,
	(in thousands)	2013		2012		2013			2012
	Cost of revenues	$	190	$	181	$	643		$	657
	Research and development		2,541		2,933		8,241			8,674
	Selling, general and administrative		3,143		2,974		10,577			10,647
	Total	$	5,874	$	6,088	$	19,461		$	19,978
	The Company received cash of $6.8 million and $23.5 million related to the issuance of stock-based awards during the three and nine months ended September 28, 2013, respectively.  The Company received cash of $6.9 million and $15.9 million related to the issuance of stock-based awards during the three and nine months ended September 30, 2012, respectively.
	Equity Award Plans
	The Company issues its common stock under the provisions of the 2008 Equity Plan (the “2008 Plan”).   Stock option awards are granted with an exercise price equal to the closing market price of the Company’s common stock at the grant date. The options generally expire within 10 years and vest over four years.
	The 2008 Plan was approved by stockholders at the 2008 Annual Meeting.  The 2008 Plan became effective on January 1, 2009 (the “Effective Date”).  It is a successor to the 1994 Incentive Stock Plan (the “1994 Plan”) and the 2001 Stock Option Plan (the “2001 Plan”).  Up to 30,000,000 shares of our common stock have been initially reserved for issuance under the 2008 Plan.  At the 2012 Annual Meeting, stockholders approved an increase in shares reserved for issuance under the 2008 plan by 9,500,000 shares which shares were registered on May 14, 2012 on Form S-8 bringing the total number of authorized and registered shares available under the 2008 Plan to 39,500,000.  To the extent that a share that is subject to an award that counts as 1.6 shares against the 2008 Plan’s share reserve (i.e., dividend equivalents, RSUs or stock awards awarded under the 2008 Plan when those shares are issued for cash consideration per share or unit less than 100% of the fair market value of our common stock on the award date), is added back into the 2008 Plan upon expiration or termination of the award or repurchase or forfeiture of the shares, the number of shares of common stock available for issuance under the 2008 Plan will be credited with 1.6 shares.  The implementation of the 2008 Plan did not affect any options or restricted stock units outstanding under the 1994 Plan or the 2001 Plan on the Effective Date.  To the extent that any of those options or restricted stock units subsequently terminate unexercised or prior to issuance of shares thereunder, the number of shares of common stock subject to those terminated awards will be added to the share reserve available for issuance under the 2008 Plan, up to an additional 15,000,000 shares. No additional shares may be issued under the 1994 Plan or the 2001 Plan.  In 2006, the Company assumed the stock option plans and all outstanding stock options of Passave, Inc. as part of the merger consideration in that business combination.  In 2010, the Company assumed the stock option plans and all outstanding stock options of Wintegra, Inc. as part of that business combination.
	Activity under the option plans during the nine months ended September 28, 2013 was as follows:
			Number of options	Weighted average exercise price per share			Weighted average remaining contractual term (years)			Aggregate intrinsic value at September 28, 2013
	Outstanding, December 29, 2012		28,001,047	$	7.93
	Granted and Assumed		1,059,548	$	6.43
	Exercised		-2,277,589	$	5.32
	Forfeited		-608,829	$	7.33
	Expired		-1,789,523	$	8.58
	Outstanding, September 28, 2013		24,384,654	$	8.08		5.06		$	8,965,117
	Vested & expected to vest, September 28, 2013		24,004,344	$	8.10		5.00		$	8,819,626
	Exercisable, September 28, 2013		20,138,491	$	8.34		4.39		$	7,509,493
	The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying options and the quoted price of the Company’s common stock for the options that were in-the-money at September 28, 2013.  Total forfeitures recorded amounted to $2.0 million during each of the nine months ended September 28, 2013, and September 30, 2012, respectively.
	The fair value of the Company’s stock option awards granted to employees is estimated using a lattice-binomial valuation model.  This model considers the contractual term of the option, the probability that the option will be exercised prior to the end of its contractual life, and the probability of termination or retirement of the option holder in computing the value of the option.   The model requires the input of highly subjective assumptions including the expected stock price volatility and expected life.
	The Company’s estimates of expected volatilities are based on a weighted historical and market-based implied volatility. The Company uses historical data to estimate option exercises and employee terminations within the valuation model; separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes.  The expected term of options granted is derived from the output of the stock option valuation model and represents the period of time that granted options are expected to be outstanding.  The risk-free rate for periods within the expected life of the stock option is based on the U.S. Treasury yield curve in effect at the time of the grant.
	The fair values of the Company’s stock option awards were calculated for expense recognition using an estimated forfeiture rate, assuming no expected dividends and using the following weighted average assumptions:
			Three Months Ended			Nine Months Ended
			September 28,	September 30,		September 28,		September 30,
			2013	2012		2013		2012
	Expected life (years)		5.6	5.3		5.9		5.3
	Expected volatility		40%	42%		40%		43%
	Risk-free interest rate		1.6%	0.8%		1.6%		0.8%
	The weighted average grant-date fair value per stock options granted during the three and nine months ended September 28, 2013 was $2.45 and $2.47, respectively.  The weighted average grant-date fair value per stock option granted during the three and nine months ended September 30, 2012 was $2.08 and $2.22, respectively.  The total intrinsic value of stock options exercised during the three months and nine months ended September 28, 2013 was $0.6  million and $2.8 million, respectively.  The total intrinsic value of stock options exercised during the three and nine months ended September 30, 2012 was $0.4 million and $1.6 million, respectively.
	As of September 28, 2013, there was $9.9 million of total unrecognized compensation costs related to unvested stock options granted under the plans, which is expected to be recognized over an average period of 2.2 years.
	Restricted Stock Units
	On February 1, 2007, the Company amended its stock award plans to allow for the issuance of Restricted Stock Units (“RSUs”) to employees and members of the Board of Directors.  The first grant of RSUs occurred on May 25, 2007.  The grants vest over varying terms, up to a maximum of four years from the date of grant.   The first grant of Performance RSUs occurred on August 27, 2012 to the CEO. The performance goal applicable to these Performance RSUs granted in 2012 were based on the degree of achievement of the Company’s 2012 revenue with vesting terms over three years. Performance RSUs were also granted on August 26, 2013 to the CEO and Executive Direct reports. The performance metric applicable to the RSUs granted in 2013 are based on the degree of achievement of Total Shareholder Return (“TSR”) relative to Global Industry Classification Standards (“GICS”) Semiconductor Companies (8-Digit) for the Performance Period (July 1,  2013 - June 30, 2015). The total estimated $2.5 million fair value of these 2013 grants will be recognized as compensation expense over the grant’s vesting terms, which vest fifty percent vesting on August 25, 2015 and fifty percent vesting on August 25, 2016.
	A summary of RSU activity during the nine months ended September 28, 2013 is as follows:
			Restricted Stock Units	Weighted Average Remaining Contractual Term (years)			Aggregate intrinsic value at September 28, 2013
	Unvested shares at December 29, 2012		5,358,201		-		-
	Awarded		3,503,100		-		-
	Released		-1,923,812		-		-
	Forfeited		-495,409		-		-
	Unvested shares at September 28, 2013		6,442,080		1.93	$	42,693,348
	Restricted Stock Units expected to vest September 28, 2013		5,446,803		1.82	$	36,112,306
	The intrinsic value of RSUs vested during the three and nine months ended September 28, 2013 was $4.9 million and $11.8 million, respectively.  As of September 28, 2013, total unrecognized compensation costs, adjusted for estimated forfeitures, related to unvested RSUs was $32.5 million, which is expected to be recognized over the next 3 years.
	Employee Stock Purchase Plan
	In 1991, the Company adopted an Employee Stock Purchase Plan (the “ESPP”) under Section 423 of the Internal Revenue Code.  The ESPP allows eligible participants to purchase shares of the Company’s common stock at six-month intervals through payroll deductions at a price of 85% of the lower of the fair market value at specific dates in those six-month intervals (calculated in the manner provided in the plan). Shares of the Company’s common stock are offered under the ESPP through a series of successive offering periods, generally with a maximum duration of 24 months.  Under the ESPP, the number of shares authorized to be available for issuance under the plan is increased automatically on January 1 of each year until the expiration of the plan.  The increase will be limited to the lesser of (i) 1% of the outstanding shares on January 1 of each year, (ii) 2,000,000 shares (after adjusting for stock dividends), or (iii) an amount to be determined by the Board of Directors.  The ESPP was terminated on February 10, 2011 and no additional shares will be issued under the ESPP.
	The 2011 Employee Stock Purchase Plan (the “2011 Plan”) was approved by stockholders at the 2010 Annual Meeting.  The 2011 Plan became effective on February 11, 2011 and is the successor to the ESPP. The 2011 Plan consists of consecutive offering periods, generally of a duration of 6 months, and allows eligible employees to purchase shares of the Company’s common stock at the end of each such offering period, generally February and August of any year, at a price per share equal to 85% of the lower of the fair market value of a share of Common Stock on the start date or the fair market value of a share of Common Stock on the exercise date of the offering period.  Employees purchase such shares through payroll deductions which may not exceed 10% of their total cash compensation.  The 2011 Plan imposes certain limitations upon an employee’s right to acquire Common Stock, including the following: (i) no employee may purchase more than 7,500 shares of Common Stock on any one purchase date and (ii) no employee may be granted rights to purchase more than $25,000 worth of Common Stock for each calendar year that such rights are at any time outstanding.  Up to 12,000,000 shares of our common stock have been initially reserved for issuance under the 2011 Plan.
	During the first nine months of 2013,  2,156,199 shares were issued under the 2011 Plan at a weighted average price of $5.19 per share.  As of September 28, 2013,  6,296,935 shares were available for future issuance under the 2011 Plan compared to 8,453,134 under the 2011 Plan as at December 29, 2012.
			Three Months Ended
			September 28,	September 30,
			2013	2012
	Expected life (years)		0.5	0.5
	Expected volatility		34%	44%
	Risk-free interest rate		0.1%	0.2%
	The weighted average grant date fair value per ESPP award granted during the first nine months of 2013 was $1.61.  The total intrinsic value of ESPP shares issued during the first nine months of 2013 was $2.8 million.
	As of September 28, 2013, total unrecognized compensation costs, adjusted for estimated forfeitures, related to non-vested ESPP awards was $1.3 million which is expected to be recognized over two months.

Balance_Sheet_Items

Balance Sheet Items	9 Months Ended
	Sep. 28, 2013
Balance Sheet Items [Abstract]	'
Balance Sheet Items	'
	NOTE 6.   Balance Sheet Items
	a.	Inventories.
	Inventories (net of reserves of $6.3 million and $7.8 million at September 28, 2013 and December 29, 2012, respectively) were as follows:
		September 28,		December 29,
	(in thousands)	2013		2012
	Work-in-progress	$	14,518	$	9,867
	Finished goods		17,506		13,681
		$	32,024	$	23,548
	b.	Product warranties.
	The Company provides a limited warranty on most of its standard products and accrues for the estimated cost at the time of shipment.  The Company estimates its warranty costs based on historical failure rates and related repair or replacement costs and periodically reassess these estimates as actual warranty activities occur.  The changes in the Company’s accrued warranty obligations from December 29, 2012 to September 28, 2013, and from December 31, 2011 to September 30, 2012 were as follows:
		Nine Months Ended
		September 28,		September 30,
	(in thousands)	2013		2012
	Balance, beginning of the period	$	5,981	$	5,415
	Accrual for new warranties issued		402		1,311
	Reduction for payments and product replacements		-868		-161
	Adjustments related to revisions and changes in estimate of warranty accrual		-3,198		-1,312
	Balance, end of the period	$	2,317	$	5,253
	The Company’s accrual for warranty obligations is included in Accrued liabilities in the interim Condensed Consolidated Balance Sheet.  The change in estimate of warranty accrual in the third quarter includes a reduction for amounts over accrued in prior periods and amounts do not have a material impact to 2013 or prior periods.

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 28, 2013
Investment Securities [Abstract]	'
Investment Securities	'
	NOTE 7.  Investment Securities
	The Company’s available for sale investments, by investment type, consists of the following at September 28, 2013 and December 29, 2012:
			28-Sep-13
	(in thousands)	Amortized Cost		Gross Unrealized Gains*		Gross Unrealized Losses*		Fair Value
	Cash equivalents:
	Money market funds	$	14,407	$	-	$	-	$	14,407
	Total cash equivalents		14,407		-		-		14,407
	Short-term investments:
	Corporate bonds and notes		10,640		413		-5		11,048
	US treasury and government agency notes		2,383		37		-		2,420
	Foreign government and agency notes		-		-		-		-
	US states and municipal securities		200		2		-		202
	Total short-term investments		13,223		452		-5		13,670
	Long-term investment securities:
	Corporate bonds and notes		77,833		54		-97		77,790
	US treasury and government agency notes		29,453		37		-11		29,479
	Foreign government and agency notes		1,646		3		-1		1,648
	US states and municipal securities		441		1		-		442
	Total long-term investment securities		109,373		95		-109		109,359
	Total	$	137,003	$	547	$	-114	$	137,436
	*Gross unrealized gains include accrued interest on investments of $0.4 million.  The remainder of the gross unrealized gains and losses are included in the interim Condensed Consolidated Balance Sheet as Accumulated other comprehensive income (loss).
			29-Dec-12
	(in thousands)	Amortized Cost		Gross Unrealized Gains*		Gross Unrealized Losses*		Fair Value
	Cash equivalents:
	Money market funds	$	50,528	$	-	$	-	$	50,528
	Total cash equivalents		50,528		-		-		50,528
	Short-term investments:
	Corporate bonds and notes		9,163		522		-		9,685
	US states and municipal securities		1,720		26		-		1,746
	Total short-term investments		10,883		548		-		11,431
	Long-term investment securities:
	Corporate bonds and notes		53,567		329		-16		53,880
	US treasury and government agency notes		33,830		25		-1		33,854
	Foreign government and agency notes		4,018		26		-		4,044
	Total long-term investment securities		91,415		380		-17		91,778
	Total	$	152,826	$	928	$	-17	$	153,737
	*Gross unrealized gains include accrued interest on investments of $0.9 million.  The remainder of the gross unrealized gains and losses are included in the interim Condensed Consolidated Balance Sheet as Accumulated other comprehensive income (loss).
	As of September 28, 2013 and December 29, 2012, the fair value of certain of the Company’s available-for-sale securities was less than their cost basis.  Management reviews various factors in determining whether to recognize an impairment charge related to these unrealized losses, including the current financial and credit market environment, the financial condition, near-term prospects of the issuer of the investment security, the magnitude of the unrealized loss compared to the cost of the investment, length of time the investment has been in a loss position and the Company’s intent and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery of market value.  As of September 28, 2013, the Company determined that all the unrealized losses are temporary in nature and recorded them as a component of Accumulated other comprehensive income (loss).

Credit_Facility

Credit Facility	9 Months Ended
	Sep. 28, 2013
Credit Facility [Abstract]	'
Credit Facility	'
	NOTE 8. Credit Facility
	As of September 28, 2013, the Company had available revolving line of credit with a bank under which the Company may borrow up to $100 million, of which a $nil was drawn. The Company may request, from time to time, and subject to customary conditions, including receipt of commitments, that the revolving credit facility be increased by an aggregate amount not to exceed $150 million. Interest payments are based on LIBOR plus margins, where margins ranges from 1.75% to 2.25% per annum based on the Company’s leverage ratio.  The revolving credit facility is available for general corporate purposes. The credit facility is collateralized by substantially all of the Company’s personal property. The Company’s obligations under the credit facility are jointly and severally guaranteed by material wholly-owned domestic subsidiaries of the Company.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 28, 2013
Income Taxes [Abstract]	'
Income Taxes	'
	NOTE 9.  Income Taxes
	The Company recorded a provision for income taxes of $4.2 million for the three months ended September 28, 2013 and a recovery for income taxes of $5.5 million for the three months ended September 30, 2012, respectively.
	For the three months ended September 28, 2013, compared to the same period last year, the increase in the provision for income taxes of $9.7 million was mainly the result of an additional $2.9 million tax provision relating to intercompany transactions, a  $2.2 million increase in tax expense relating to prior year true ups, $1.7 million in tax expense related to the utilization of stock option related loss carryforwards, and a $1 million increase in tax expense from deferred income taxes related to acquired goodwill.  The remaining change is mainly due to the change in mix of income across our foreign subsidiaries.  As a result, the Company’s effective tax rate was 285% for the three months ended September 28, 2013 and 2% for the three months ended September 30, 2012, respectively.
	The Company recorded a provision for income taxes of $12.9 million for the nine months ended September 28, 2013, and a provision for income taxes of $49.8 million for the nine months ended September 30, 2012, respectively.
	The Company’s effective tax rate was (456%) and (17%) for the nine months ended September 28, 2013 and the nine months ended September 30, 2012, respectively.
	For the nine months ended September 28, 2013, compared to the same period last year, the decrease in the provision for income taxes of $36.9 million was mainly the result of a $20 million withholding tax recorded in 2012 related to an intercompany dividend paid to fund the Company’s share repurchase programs, an $18.4 million period over period reduction in tax expense related to higher 2012 taxable income generated in the United States by the intercompany dividend that was offset by available stock-option-related loss carryforwards, a  $4.5 million reduction in tax expense from intercompany transactions, a  $1.6 million increase in tax expense from deferred income taxes related to acquired goodwill, and a $2.5 million increase in tax expense relating to prior year true ups.  The remaining change is mainly due to the mix of income across our foreign subsidiaries.
	The difference between our effective tax rate and the 35% federal statutory rate results from foreign earnings eligible for tax rates lower than the federal statutory rate due to economic incentives subject to certain criteria granted by foreign jurisdictions and extending to approximately 2020, adjustments for prior years taxes and tax credits, the effect of intercompany transactions, investment tax credits earned, changes in valuation allowance, changes in accruals related to the unrecognized tax benefit liabilities, permanent differences arising from stock-based compensation, non-deductible, intangible asset amortization and utilization of stock option related loss carryforwards recorded in equity.
	As at September 28, 2013, the Company’s liability for unrecognized tax benefits on a world-wide consolidated basis was $89.5 million. Recognition of an amount different from this estimate would affect the Company’s effective tax rate.
	Because our projected tax rate is volatile, the provision for income taxes in our interim Condensed Consolidated Financial Statements reflects our actual effective tax rate for the current quarter.  We believe our year-to-date tax provision for income taxes is the most reliable estimate of our annual effective tax rate.  The effective income tax rate for the current fiscal year will likely be different from the tax rate in effect for the three and nine months ended September 28, 2013 and could be considerably higher or lower, depending largely on our operating results before taxes and the geographic mix of income (loss) for the year.

Net_Loss_Per_Share

Net Loss Per Share	9 Months Ended
	Sep. 28, 2013
Net Loss Per Share [Abstract]	'
Net Income (Loss) Per Share	'
	NOTE 10.   Net Loss Per Share
	The following table sets forth the computation of basic and diluted net loss per share:
		Three Months Ended				Nine Months Ended
		September 28,		September 30,		September 28,		September 30,
		2013		2012			2013		2012
				(As Restated -				(As Restated -
	(in thousands, except per share amounts)			See Note 11)				See Note 11)
	Numerator:
	Net loss	$	-2,724	$	-274,524	$	-15,807	$	-338,955
	Denominator:
	Basic weighted average common shares outstanding (1)		205,377		209,512		204,269		221,323
	Diluted weighted average common shares outstanding (1)		205,377		209,512		204,269		221,323
	Basic net loss per share	$	-0.01	$	-1.31	$	-0.08	$	-1.53
	Diluted net loss per share	$	-0.01	$	-1.31	$	-0.08	$	-1.53
	-1	PMC-Sierra Ltd. special shares are included in the calculation of basic and diluted weighted average common shares outstanding.
	In the three and nine months ended September 28, 2013, the Company had approximately 2.1 million of stock options and Restricted Stock Units (1 million and 1.8 million in the three and nine months ended September 30, 2012, respectively) that were not included in the diluted net loss per share because they would have been anti-dilutive.

Error_Corrections

Error Corrections	9 Months Ended
	Sep. 28, 2013
Error Corrections [Abstract]	'
Error Corrections	'
	NOTE 11. Error  Corrections
	The comparative condensed consolidated financial statements as of December 29, 2012 and for the three and nine months ended September 30, 2012 have been restated to correct the misapplication of accounting principles related to income tax benefits associated with stock option deductions in excess of the expense recognized in the financial statements.  In prior periods impacted by this matter, the Company understated the income tax benefits of its loss carry-forwards that are required to be included in equity, rather than in income tax expense (benefit).  These income tax benefits were generated primarily in the 1999 and 2000 years and were utilized to reduce the previously recorded income tax expense throughout the years from 2006 and into the first two quarters of 2013.  From 2006 and forward, the Company should have recorded the income tax benefit of utilizing these stock option related loss carry-forwards as an increase to Additional Paid-in Capital, rather than as a reduction of income tax expense.  There was no change to the total amount of income tax loss carry-forwards or any other income tax assets available or utilized for tax purposes, nor to the actual amount of income tax payable to the taxing authorities as a result of this matter, in any period.
	In connection with restating our historical financial statements, the Company also made certain other corrections for the timing of recognition of amounts related to amended tax return filings and certain tax credits, and recognition of a foreign subsidiary’s deferred tax assets, not previously recognized.  The foreign subsidiary was acquired in 2010 and the deferred tax assets should have been recognized as part of the acquisition accounting, and therefore resulted in a corresponding adjustment to goodwill.
	In addition, the Company restated the quarter ended June 29, 2013 to reduce its contingency accrual estimate by $2.9M in connection with favorable developments in the status of certain contingencies.
	The tables below illustrate the effects on the condensed consolidated balance sheet and statements of operations:
		As at				As at				As at
		29-Dec-12				30-Mar-13				29-Jun-13
		As Restated		As Previously		As Restated		As Previously		As Restated		As Previously
	(in thousands)			Reported				Reported				Reported
	CONDENSED CONSOLIDATED BALANCE SHEETS
	Non-current assets:
	Prepaid tax expenses	$	19,152	$	11,851	$	15,944	$	10,441	$	6,560	$	2,856
	Goodwill and other intangible assets, net	$	381,087	$	381,087	$	370,498	$	370,498	$	360,024	$	360,024
	Total assets	$	894,773	$	887,472	$	898,129	$	892,626	$	900,025	$	896,857
	Liabilities:
	Accrued liabilities	$	72,282	$	72,282	$	65,385	$	65,385	$	71,997	$	74,887
	Deferred tax and other long-term tax liabilities	$	41,936	$	44,849	$	42,884	$	45,909	$	44,145	$	47,282
	Liability for unrecognized tax benefits - non-current	$	34,957	$	29,236	$	35,243		29,614		34,363	$	28,944
	Stockholders' equity:
	Common stock and additional paid in capital	$	1,553,137	$	1,527,710	$	1,575,453	$	1,549,830	$	1,579,166	$	1,552,145
	Accumulated deficit	$	-917,825	$	-896,891	$	-926,226	$	-903,716	$	-932,656	$	-909,616
	Total stockholders' equity	$	635,928	$	631,435	$	649,399	$	646,490	$	645,730	$	641,953
	Total liabilities and stockholders' equity	$	894,773	$	887,472	$	898,129	$	892,626	$	900,025	$	896,857
		Three Months Ended				Three Months Ended				Six Months Ended
		30-Mar-13				29-Jun-13				29-Jun-13
				As Previously				As Previously				As Previously
	(in thousands, except for per share amounts)	As Restated		Reported		As Restated		Reported		As Restated		Reported
	CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
	Research and development	$	54,624	$	54,624	$	51,681	$	54,571	$	106,305	$	109,195
	Provision for income taxes	$	-4,164	$	-2,589	$	-4,602	$	-1,181	$	-8,766	$	-3,770
	Net loss	$	-8,400	$	-6,825	$	-4,683	$	-4,152	$	-13,083	$	-10,977
	Net loss per common share - basic	$	-0.04	$	-0.03	$	-0.02	$	-0.02	$	-0.06	$	-0.05
	Net loss per common share - diluted	$	-0.04	$	-0.03	$	-0.02	$	-0.02	$	-0.06	$	-0.05
		Three Months Ended				Three Months Ended				Six Months Ended
		1-Apr-12				1-Jul-12				1-Jul-12
				As Previously				As Previously				As Previously
	(in thousands, except for per share amounts)	As Restated		Reported		As Restated		Reported		As Restated		Reported
	CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
	(Provision for) recovery of income taxes	$	-55,240	$	-57,811	$	-65	$	-519	$	-55,305	$	-58,330
	Net (loss) income	$	-64,782	$	-67,353	$	351	$	-103	$	-64,431	$	-67,456
	Net (loss) income per common share - basic	$	-0.28	$	-0.29	$	0.00	$	0	$	-0.28	$	-0.3
	Net (loss) income per common share - diluted	$	-0.28	$	-0.29	$	0.00	$	0	$	-0.28	$	-0.3
		Three Months Ended				Nine Months Ended
		30-Sep-12				30-Sep-12
				As Previously				As Previously
	(in thousands, except for per share amounts)	As Restated		Reported		As Restated		Reported
	CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
	(Provision for) recovery of income taxes	$	5,515	$	5,577	$	-49,790	$	-52,753
	Net loss	$	-274,524	$	-275,907	$	-338,955	$	-343,363
	Net loss per common share - basic	$	-1.31	$	-1.32	$	-1.53	$	-1.55
	Net loss per common share - diluted	$	-1.31	$	-1.32	$	-1.53	$	-1.55

Stock_Repurchase_Program_And_A

Stock Repurchase Program And Accelerated Stock Buyback	9 Months Ended
	Sep. 28, 2013
Stock Repurchase Program And Accelerated Stock Buyback [Abstract]	'
Stock Repurchase Program and Accelerated Stock Buyback	'
	NOTE 12.  Stock Repurchase Program and Accelerated Stock Buyback
	On March 13, 2012 the Company announced a $275 million stock repurchase program. For the three months and nine months ended September 28, 2013 the Company repurchased 2.7 million and 3.6 million shares respectively.  Total cash cost was approximately $17.1 million and $22.6 million, respectively.  On May 2, 2012, the Company entered into an Accelerated Stock Buyback agreement (“ASB agreement”) with Goldman, Sachs & Co. (“Goldman”) to repurchase an aggregate of $160 million of PMC common stock.  The Company will acquire these common shares as part of its $275 million stock repurchase program announced on March 13, 2012.  During the nine months ended September 30, 2012, the Company received 22,228,520 shares from Goldman.  These shares were cancelled during the second quarter of 2012. On October 2, 2012 Goldman Sachs completed the repurchase of the Company’s common stock under the ASB agreement and 4,600,788 shares were delivered and cancelled on October 5, 2012.  The total shares repurchased under this ASB agreement are 26,829,309 common shares. The repurchased shares were retired immediately.  Accordingly, the repurchased shares were recorded as a reduction of common stock, additional paid-in capital and accumulated deficit.  As of September 28, 2013, the Company had spent $182.6 million of the announced $275 million stock repurchase program.
	In addition, on November 10, 2011, the Board of Directors of the Company authorized a share repurchase plan for fiscal year 2012. Under the authorization, the Company may repurchase up to the sum of the number of shares of the Company’s common stock purchased in 2012 by Company employees under the Company’s qualified stock purchase plans and the number of shares of the Company’s common stock approved by the Board of Directors or its Compensation Committee for employee equity grants in 2012, at an aggregate cost to the Company of not more than $40 million. During the three months ended September 30, 2012, the Company repurchased and retired 4.3 million shares for approximately $25 million in cash.  During the nine months ended September 30, 2012, the Company repurchased and retired 5.2 million shares for approximately $30.6 million in cash.  Accordingly, the repurchased shares were recorded as a reduction of Common stock, Additional paid-in capital and Accumulated deficit.

Summary_Of_Significant_Account1

Summary Of Significant Accounting Policies (Policy)	9 Months Ended
	Sep. 28, 2013
Summary Of Significant Accounting Policies [Abstract]	'
Description Of Business	'
	Description of business.  PMC-Sierra, Inc. (the “Company” or “PMC”) is a semiconductor innovator transforming networks that connect, move and store digital content. Building on a track record of technology leadership, the Company is driving innovation across storage, optical and mobile networks.  PMC’s highly integrated solutions increase performance and enable next generation services to accelerate the network transformation.
Basis Of Presentation	'
	Basis of presentation. The accompanying interim condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”) and United States Generally Accepted Accounting Principles (“GAAP”).  Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to those rules or regulations.  These interim condensed consolidated financial statements are unaudited, but reflect all adjustments which are normal and recurring in nature and are, in the opinion of management, necessary to provide a fair statement of results for the interim periods presented.  These interim condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and accompanying notes in the Company’s Annual Report on Form 10-K/A for the year ended December 29, 2012 filed with the Securities and Exchange Commission on November 8, 2013.  Financial information presented for periods prior to the three months ended September 28, 2013 has been restated – see Note 11.  The results of operations for the interim periods are not necessarily indicative of results to be expected in future periods. Fiscal 2013 will consist of 52 weeks and will end on Saturday, December 28, 2013.  Fiscal 2012 consisted of 52 weeks and ended on Saturday, December 29, 2012.  The third quarter of each of 2013 and 2012 consisted of 13 weeks.  The Company’s reporting currency is the U.S. dollar and presented in thousands unless otherwise stated.
Estimates	'
	Estimates. The preparation of financial statements and related disclosures in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes.  Estimates are used for, but not limited to, stock-based compensation, purchase accounting assumptions including those used to calculate the fair value of intangible assets and goodwill, the valuation of investments, accounting for doubtful accounts, inventory reserves, depreciation and amortization, asset impairments, revenue recognition, sales returns, warranty costs, income taxes including uncertain tax positions, restructuring costs, assumptions used to measure the fair value of the debt component of our senior convertible notes, accounting for employee benefit plans, and contingencies.  Actual results could differ materially from these estimates.

Business_Combinations_Tables

Business Combinations (Tables)	9 Months Ended
	Sep. 28, 2013
Business Combinations [Abstract]	'
Schedule of Business Acquisition	'
	Current assets	$	2,210
	Intangible assets		67,400
	Goodwill		26,643
	Total asset		96,253
	Assumed liabilities		-155
	Total preliminary purchase price	$	96,098
Schedule Of Amortizable Intangible Assets	'
			Estimated fair value	Weighted average useful life
	Order backlog	$	100	< 1 year
	Existing technology		700	2 years
	Customer relationships		3,400	7 years
	Core technology		63,200	7 years
	Total intangible assets	$	67,400

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 28, 2013
Fair Value Measurements [Abstract]	'
Financial Assets Measured At Fair Value On Recurring Basis	'
		Fair value,
		28-Sep-13
	(in thousands)	Level 1		Level 2
	Assets:
	Corporate bonds and notes (1)	$	73,914	$	14,924
	Money market funds (1)		14,407		-
	United States (“US”) treasury and government agency notes (1)		31,899		-
	Foreign government and agency notes (1)		1,648		-
	US state and municipal securities (1)		644		-
	Forward currency contracts (2)		-		129
	Total assets	$	122,512	$	15,053
		Fair value,
		29-Dec-12
	(in thousands)	Level 1		Level 2
	Assets:
	Corporate bonds and notes (1)	$	63,565	$	-
	Money market funds (1)		50,528		-
	US treasury and government agency notes (1)		33,854		-
	Foreign government and agency notes (1)		4,044		-
	US state and municipal securities (1)		1,746		-
	Forward currency contracts (2)		-		392
	Total assets	$	153,737	$	392
	(1)  Included in Cash and cash equivalents, Short-term investments, and Long-term investment securities.  See Note 7. Investment Securities.
	(2)  Included in Prepaid expenses and other current assets.

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 28, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Schedule Of Stock-Based Compensation Expense	'
		Three Months Ended				Nine Months Ended
		September 28,		September 30,		September 28,			September 30,
	(in thousands)	2013		2012		2013			2012
	Cost of revenues	$	190	$	181	$	643		$	657
	Research and development		2,541		2,933		8,241			8,674
	Selling, general and administrative		3,143		2,974		10,577			10,647
	Total	$	5,874	$	6,088	$	19,461		$	19,978
Schedule Of Activity Under Option Plans	'
			Number of options	Weighted average exercise price per share			Weighted average remaining contractual term (years)			Aggregate intrinsic value at September 28, 2013
	Outstanding, December 29, 2012		28,001,047	$	7.93
	Granted and Assumed		1,059,548	$	6.43
	Exercised		-2,277,589	$	5.32
	Forfeited		-608,829	$	7.33
	Expired		-1,789,523	$	8.58
	Outstanding, September 28, 2013		24,384,654	$	8.08		5.06		$	8,965,117
	Vested & expected to vest, September 28, 2013		24,004,344	$	8.10		5.00		$	8,819,626
	Exercisable, September 28, 2013		20,138,491	$	8.34		4.39		$	7,509,493
Schedule Of Fair Value Assumptions	'
			Three Months Ended			Nine Months Ended
			September 28,	September 30,		September 28,		September 30,
			2013	2012		2013		2012
	Expected life (years)		5.6	5.3		5.9		5.3
	Expected volatility		40%	42%		40%		43%
	Risk-free interest rate		1.6%	0.8%		1.6%		0.8%
Schedule Of Summary Of RSU Activity	'
			Restricted Stock Units	Weighted Average Remaining Contractual Term (years)			Aggregate intrinsic value at September 28, 2013
	Unvested shares at December 29, 2012		5,358,201		-		-
	Awarded		3,503,100		-		-
	Released		-1,923,812		-		-
	Forfeited		-495,409		-		-
	Unvested shares at September 28, 2013		6,442,080		1.93	$	42,693,348
	Restricted Stock Units expected to vest September 28, 2013		5,446,803		1.82	$	36,112,306
2011 Employee Stock Purchase Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Schedule Of Fair Value Assumptions	'
			Three Months Ended
			September 28,	September 30,
			2013	2012
	Expected life (years)		0.5	0.5
	Expected volatility		34%	44%
	Risk-free interest rate		0.1%	0.2%

Balance_Sheet_Items_Tables

Balance Sheet Items (Tables)	9 Months Ended
	Sep. 28, 2013
Balance Sheet Items [Abstract]	'
Schedule Of Inventory	'
		September 28,		December 29,
	(in thousands)	2013		2012
	Work-in-progress	$	14,518	$	9,867
	Finished goods		17,506		13,681
		$	32,024	$	23,548
Schedule Of Product Warranties	'
		Nine Months Ended
		September 28,		September 30,
	(in thousands)	2013		2012
	Balance, beginning of the period	$	5,981	$	5,415
	Accrual for new warranties issued		402		1,311
	Reduction for payments and product replacements		-868		-161
	Adjustments related to revisions and changes in estimate of warranty accrual		-3,198		-1,312
	Balance, end of the period	$	2,317	$	5,253

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended
	Sep. 28, 2013
Investment Securities [Abstract]	'
Available For Sale Investments	'
			28-Sep-13
	(in thousands)	Amortized Cost		Gross Unrealized Gains*		Gross Unrealized Losses*		Fair Value
	Cash equivalents:
	Money market funds	$	14,407	$	-	$	-	$	14,407
	Total cash equivalents		14,407		-		-		14,407
	Short-term investments:
	Corporate bonds and notes		10,640		413		-5		11,048
	US treasury and government agency notes		2,383		37		-		2,420
	Foreign government and agency notes		-		-		-		-
	US states and municipal securities		200		2		-		202
	Total short-term investments		13,223		452		-5		13,670
	Long-term investment securities:
	Corporate bonds and notes		77,833		54		-97		77,790
	US treasury and government agency notes		29,453		37		-11		29,479
	Foreign government and agency notes		1,646		3		-1		1,648
	US states and municipal securities		441		1		-		442
	Total long-term investment securities		109,373		95		-109		109,359
	Total	$	137,003	$	547	$	-114	$	137,436
	*Gross unrealized gains include accrued interest on investments of $0.4 million.  The remainder of the gross unrealized gains and losses are included in the interim Condensed Consolidated Balance Sheet as Accumulated other comprehensive income (loss).
			29-Dec-12
	(in thousands)	Amortized Cost		Gross Unrealized Gains*		Gross Unrealized Losses*		Fair Value
	Cash equivalents:
	Money market funds	$	50,528	$	-	$	-	$	50,528
	Total cash equivalents		50,528		-		-		50,528
	Short-term investments:
	Corporate bonds and notes		9,163		522		-		9,685
	US states and municipal securities		1,720		26		-		1,746
	Total short-term investments		10,883		548		-		11,431
	Long-term investment securities:
	Corporate bonds and notes		53,567		329		-16		53,880
	US treasury and government agency notes		33,830		25		-1		33,854
	Foreign government and agency notes		4,018		26		-		4,044
	Total long-term investment securities		91,415		380		-17		91,778
	Total	$	152,826	$	928	$	-17	$	153,737
	*Gross unrealized gains include accrued interest on investments of $0.9 million.  The remainder of the gross unrealized gains and losses are included in the interim Condensed Consolidated Balance Sheet as Accumulated other comprehensive income (loss).

Net_Loss_Per_Share_Tables

Net Loss Per Share (Tables)	9 Months Ended
	Sep. 28, 2013
Net Loss Per Share [Abstract]	'
Schedule Of Net Income (Loss) Per Share	'
		Three Months Ended				Nine Months Ended
		September 28,		September 30,		September 28,		September 30,
		2013		2012			2013		2012
				(As Restated -				(As Restated -
	(in thousands, except per share amounts)			See Note 11)				See Note 11)
	Numerator:
	Net loss	$	-2,724	$	-274,524	$	-15,807	$	-338,955
	Denominator:
	Basic weighted average common shares outstanding (1)		205,377		209,512		204,269		221,323
	Diluted weighted average common shares outstanding (1)		205,377		209,512		204,269		221,323
	Basic net loss per share	$	-0.01	$	-1.31	$	-0.08	$	-1.53
	Diluted net loss per share	$	-0.01	$	-1.31	$	-0.08	$	-1.53
	-1	PMC-Sierra Ltd. special shares are included in the calculation of basic and diluted weighted average common shares outstanding.

Error_Corrections_Tables

Error Corrections (Tables)	9 Months Ended
	Sep. 28, 2013
Error Corrections [Abstract]	'
Summary Of Effects On Consolidated Balance Sheets And Statements Of Operations	'
		As at				As at				As at
		29-Dec-12				30-Mar-13				29-Jun-13
		As Restated		As Previously		As Restated		As Previously		As Restated		As Previously
	(in thousands)			Reported				Reported				Reported
	CONDENSED CONSOLIDATED BALANCE SHEETS
	Non-current assets:
	Prepaid tax expenses	$	19,152	$	11,851	$	15,944	$	10,441	$	6,560	$	2,856
	Goodwill and other intangible assets, net	$	381,087	$	381,087	$	370,498	$	370,498	$	360,024	$	360,024
	Total assets	$	894,773	$	887,472	$	898,129	$	892,626	$	900,025	$	896,857
	Liabilities:
	Accrued liabilities	$	72,282	$	72,282	$	65,385	$	65,385	$	71,997	$	74,887
	Deferred tax and other long-term tax liabilities	$	41,936	$	44,849	$	42,884	$	45,909	$	44,145	$	47,282
	Liability for unrecognized tax benefits - non-current	$	34,957	$	29,236	$	35,243		29,614		34,363	$	28,944
	Stockholders' equity:
	Common stock and additional paid in capital	$	1,553,137	$	1,527,710	$	1,575,453	$	1,549,830	$	1,579,166	$	1,552,145
	Accumulated deficit	$	-917,825	$	-896,891	$	-926,226	$	-903,716	$	-932,656	$	-909,616
	Total stockholders' equity	$	635,928	$	631,435	$	649,399	$	646,490	$	645,730	$	641,953
	Total liabilities and stockholders' equity	$	894,773	$	887,472	$	898,129	$	892,626	$	900,025	$	896,857
		Three Months Ended				Three Months Ended				Six Months Ended
		30-Mar-13				29-Jun-13				29-Jun-13
				As Previously				As Previously				As Previously
	(in thousands, except for per share amounts)	As Restated		Reported		As Restated		Reported		As Restated		Reported
	CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
	Research and development	$	54,624	$	54,624	$	51,681	$	54,571	$	106,305	$	109,195
	Provision for income taxes	$	-4,164	$	-2,589	$	-4,602	$	-1,181	$	-8,766	$	-3,770
	Net loss	$	-8,400	$	-6,825	$	-4,683	$	-4,152	$	-13,083	$	-10,977
	Net loss per common share - basic	$	-0.04	$	-0.03	$	-0.02	$	-0.02	$	-0.06	$	-0.05
	Net loss per common share - diluted	$	-0.04	$	-0.03	$	-0.02	$	-0.02	$	-0.06	$	-0.05
		Three Months Ended				Three Months Ended				Six Months Ended
		1-Apr-12				1-Jul-12				1-Jul-12
				As Previously				As Previously				As Previously
	(in thousands, except for per share amounts)	As Restated		Reported		As Restated		Reported		As Restated		Reported
	CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
	(Provision for) recovery of income taxes	$	-55,240	$	-57,811	$	-65	$	-519	$	-55,305	$	-58,330
	Net (loss) income	$	-64,782	$	-67,353	$	351	$	-103	$	-64,431	$	-67,456
	Net (loss) income per common share - basic	$	-0.28	$	-0.29	$	0.00	$	0	$	-0.28	$	-0.3
	Net (loss) income per common share - diluted	$	-0.28	$	-0.29	$	0.00	$	0	$	-0.28	$	-0.3
		Three Months Ended				Nine Months Ended
		30-Sep-12				30-Sep-12
				As Previously				As Previously
	(in thousands, except for per share amounts)	As Restated		Reported		As Restated		Reported
	CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
	(Provision for) recovery of income taxes	$	5,515	$	5,577	$	-49,790	$	-52,753
	Net loss	$	-274,524	$	-275,907	$	-338,955	$	-343,363
	Net loss per common share - basic	$	-1.31	$	-1.32	$	-1.53	$	-1.55
	Net loss per common share - diluted	$	-1.31	$	-1.32	$	-1.53	$	-1.55

Business_Combinations_Narrativ

Business Combinations (Narrative) (Details) (USD $)	3 Months Ended				9 Months Ended
	Sep. 28, 2013	Sep. 28, 2013	Sep. 30, 2012		Sep. 28, 2013	Sep. 30, 2012
Business Acquisition [Line Items]	'	'	'		'	'
Acquisition cash purchase price	$96,098,000	$96,098,000	'		$96,098,000	'
Acquisition-related costs	'	'	'		2,000,000	'
Amortizable intangible assets acquired	67,400,000	67,400,000	'		67,400,000	'
Net liabilities	-155,000	-155,000	'		-155,000	'
Goodwill expected tax deductible period	'	'	'		'15 years	'
Revenues	1,400,000	128,855,000	131,723,000	[1]	381,923,000	401,579,000	[1]
Net Loss	4,300,000	1,407,000	-276,918,000	[1]	-7,096,000	-286,271,000	[1]
Amortization of purchased intangible assets	'	13,138,000	11,624,000	[1]	34,698,000	34,537,000	[1]
Integrated Device Technology Inc Enterprise Flash Controller Business [Member]	'	'	'		'	'
Business Acquisition [Line Items]	'	'	'		'	'
Amortization of purchased intangible assets	2,400,000	'	'		'	'
Payroll accruals	700,000	'	'		'	'
Fair Value Adjustment to Inventory [Member] | Integrated Device Technology Inc Enterprise Flash Controller Business [Member]	'	'	'		'	'
Business Acquisition [Line Items]	'	'	'		'	'
Net Loss	$800,000	'	'		'	'
Core Technology [Member]	'	'	'		'	'
Business Acquisition [Line Items]	'	'	'		'	'
Estimated useful life	'	'	'		'7 years	'
Discount rate	'	'	'		16.00%	'
Developed Technology [Member]	'	'	'		'	'
Business Acquisition [Line Items]	'	'	'		'	'
Discount rate	'	'	'		16.00%	'
Existing Technology [Member]	'	'	'		'	'
Business Acquisition [Line Items]	'	'	'		'	'
Estimated useful life	'	'	'		'2 years	'
Discount rate	'	'	'		14.00%	'
Maximum [Member] | Core Technology [Member]	'	'	'		'	'
Business Acquisition [Line Items]	'	'	'		'	'
Estimated useful life	'	'	'		'7 years	'
Minimum [Member] | Core Technology [Member]	'	'	'		'	'
Business Acquisition [Line Items]	'	'	'		'	'
Estimated useful life	'	'	'		'2 years	'
[1]	As Restated

Business_Combinations_Schedule

Business Combinations (Schedule Of Business Acquisitions) (Details) (USD $)	Sep. 28, 2013
In Thousands, unless otherwise specified
Business Combinations [Abstract]	'
Current assets	$2,210
Intangible assets	67,400
Goodwill	26,643
Total assets	96,253
Assumed liabilities	-155
Total preliminary purchase price	$96,098

Business_Combinations_Schedule1

Business Combinations (Schedule Of Amortizable Intangible Assets) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'
Total intangible assets, estimated fair value	$67,400
Order Backlog [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Total intangible assets, estimated fair value	100
Weighted average useful life	'1 year
Existing Technology [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Total intangible assets, estimated fair value	700
Weighted average useful life	'2 years
Customer Relationships [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Total intangible assets, estimated fair value	3,400
Weighted average useful life	'7 years
Core Technology [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Total intangible assets, estimated fair value	$63,200
Weighted average useful life	'7 years

Derivative_Instruments_Details

Derivative Instruments (Details) (Cash Flow Hedging [Member], USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 28, 2013	Sep. 30, 2012	Dec. 29, 2012
	contract		contract
Cash Flow Hedging [Member]	'	'	'
Derivative [Line Items]	'	'	'
Forward currency contracts outstanding	36	'	73
Forward currency contracts maturity, maximum	'12 months	'	'
Notional amount of contracts	$30.50	'	$22.50
Fair value gain, net of taxes	-0.3	1.7	'
Tax effect on fair value gain	'	$0.30	'

Fair_Value_Measurements_Financ

Fair Value Measurements (Financial Assets Measured At Fair Values On Recurring Basis) (Details) (USD $)

3 Months Ended

Sep. 28, 2013

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Dec. 29, 2012

Sep. 28, 2013

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 1 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Level 2 [Member]

Corporate Bonds And Notes [Member]

Corporate Bonds And Notes [Member]

Money Market Funds [Member]

Money Market Funds [Member]

United States ("US") Treasury And Government Agency Notes [Member]

United States ("US") Treasury And Government Agency Notes [Member]

Foreign Government And Agency Notes [Member]

Foreign Government And Agency Notes [Member]

US State And Municipal Securities [Member]

US State And Municipal Securities [Member]

Forward Currency Contracts [Member]

Forward Currency Contracts [Member]

Corporate Bonds And Notes [Member]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Assets

'

$122,512,000

$153,737,000

$73,914,000

$63,565,000

$14,407,000

$50,528,000

$31,899,000

$33,854,000

$1,648,000

$4,044,000

$644,000

$1,746,000

$15,053,000

$392,000

$129,000

$392,000

$14,924,000

Transfers in and out of Level 1 and 2 fair value measurements

$14,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

StockBased_Compensation_Narrat

Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012	Dec. 29, 2012
			ShareBasedCompensationPlan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Number of stock-based compensation programs	'	'	2	'	'
Share repurchase plan, authorized amount	'	'	'	'	$275,000,000
Proceeds from issuance of stock-based awards	6,800,000	6,900,000	23,500,000	15,900,000	'
Weighted average grant-date fair value per stock option	$2.45	$2.08	$2.47	$2.22	'
Total intrinsic value of stock options	600,000	400,000	2,800,000	1,600,000	'
Total unrecognized compensation costs	9,900,000	'	9,900,000	'	'
Shares issued during period under ESPP	'	'	2,156,199	'	'
Weighted average price per share under ESPP	$5.19	'	$5.19	'	'
Stock available for further issuance during the period under ESPP	6,296,935	'	6,296,935	'	8,453,134
Total intrinsic value of ESPP shares issued	'	'	2,800,000	'	'
Total forfeitures recorded	'	'	2,000,000	2,000,000	'
RSU Activity [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Award vesting period (years)	'	'	'4 years	'	'
Total intrinsic value of stock options	4,900,000	'	11,800,000	'	'
Total unrecognized compensation costs	32,500,000	'	32,500,000	'	'
Unrecognized compensation expected to be recognized, average period	'	'	'3 years	'	'
Fair value of grants	'	'	2,500,000	'	'
Employee Stock Purchase Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Total unrecognized compensation costs	1,300,000	'	1,300,000	'	'
Stock price as a percentage of fair value	'	'	85.00%	'	'
Maximum annual increase in shares that can be issued under ESPP	'	'	2,000,000	'	'
Maximum annual increase in shares that can be issued under ESPP, percentage of outstanding shares	'	'	1.00%	'	'
Weighted average grant-date fair value per ESPP award	'	'	$1.61	'	'
2008 Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Option expiration term (years)	'	'	'10 years	'	'
Award vesting period (years)	'	'	'4 years	'	'
Common shares reserved for issuance	39,500,000	30,000,000	39,500,000	30,000,000	'
Additional shares reserved for issuance	9,500,000	'	9,500,000	'	'
Shares per award, ratio	'	'	1.6	'	'
RSUs or stock awards awarded when those shares are issued for cash consideration per share or unit, perecent, less than fair market value of common stock	100.00%	'	100.00%	'	'
Maximum number of unexercised options that may become eligible for reissuance under the plan	'	'	15,000,000	'	'
2011 Employee Stock Purchase Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Common shares reserved for issuance	12,000,000	'	12,000,000	'	'
Stock price as a percentage of fair value	'	'	85.00%	'	'
Maximum percentage of compensation an employee can use to purchase stock	10.00%	'	10.00%	'	'
2012 Annual Plan Of Record [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Award vesting period (years)	'	'	'3 years	'	'
Maximum [Member] | Employee Stock Purchase Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Maximum duration of offering period of common stock under ESPP (months)	'	'	'24 months	'	'
Maximum [Member] | 2011 Employee Stock Purchase Plan [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Maximum shares of stock an employee can purchase	'	'	7,500	'	'
Maximum amount granted to each employee to purchase common stock under ESPP	'	'	$25,000	'	'
Pre-Vesting [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Unrecognized compensation expected to be recognized, average period	'	'	'2 years 2 months 12 days	'	'
August 25, 2015 [Member] | RSU Activity [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Award vesting percentage	'	'	50.00%	'	'
August 25, 2016 [Member] | RSU Activity [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Award vesting percentage	'	'	50.00%	'	'

StockBased_Compensation_Schedu

Stock-Based Compensation (Schedule Of Stock-Based Compensation Expense) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	$5,874	$6,088	$19,461	$19,978
Cost of revenues [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	190	181	643	657
Research and development [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	2,541	2,933	8,241	8,674
Selling, general and administrative [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	$3,143	$2,974	$10,577	$10,647

StockBased_Compensation_Schedu1

Stock-Based Compensation (Schedule Of Activity Under Option Plans) (Details) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 28, 2013
Stock-Based Compensation [Abstract]	'
Outstanding beginning balance, Number of options	28,001,047
Granted, Number of options	1,059,548
Exercised, Number of options	-2,277,589
Forfeited, Number of options	-608,829
Expired, Number of options	-1,789,523
Outstanding ending balance, Number of options	24,384,654
Vested & expected to vest, Number of options	24,004,344
Exercisable ending balance, Number of options	20,138,491
Outstanding beginning balance, Weighted average exercise price per share	$7.93
Granted, Weighted average exercise price per share	$6.43
Exercised, Weighted average exercise price per share	$5.32
Forfeited, Weighted average exercise price per share	$7.33
Expired, Weighted average exercise price per shre	$8.58
Outstanding ending balance, Weighted average exercise price per share	$8.08
Vested & expected to vest, Weighted average exercise price per share	$8.10
Exercisable ending balance, Weighted average exercise price per share	$8.34
Outstanding ending balance, Weighted average remaining contractual term (years)	'5 years 22 days
Vested & expected to vest, Weighted average remaining contractual term (years)	'5 years
Exercisable ending balance, Weighted average remaining contractual term (years)	'4 years 4 months 21 days
Outstanding ending balance, Aggregate intrinsic value	$8,965,117
Vested & expected to vest, Aggregate intrinsic value	8,819,626
Exercisable ending balance, Aggregate intrinsic value	$7,509,493

StockBased_Compensation_Schedu2

Stock-Based Compensation (Schedule Of Fair Values Of Company's Stock Option Awards) (Details)	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Expected life (years)	'5 years 7 months 6 days	'5 years 3 months 18 days	'5 years 10 months 24 days	'5 years 3 months 18 days
Expected volatility	40.00%	42.00%	40.00%	43.00%
Risk-free interest rate	1.60%	0.80%	1.60%	0.80%
Employee Stock Purchase Plan [Member]	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Expected life (years)	'	'	'6 months	'6 months
Expected volatility	'	'	34.00%	44.00%
Risk-free interest rate	'	'	0.10%	0.20%

StockBased_Compensation_Schedu3

Stock-Based Compensation (Schedule Of Summary Of RSU Activity) (Details) (USD $)	9 Months Ended
	Sep. 28, 2013
Stock-Based Compensation [Abstract]	'
Beginning of period, Unvested Restricted Stock Units	5,358,201
Awarded, Restricted Stock Units	3,503,100
Released, Restricted Stock Units	-1,923,812
Forfeited, Restricted Stock Units	-495,409
End of period, Restricted Stock Units	6,442,080
Restricted Stock Units expected to vest	5,446,803
End of period, Weighted Average Remaining Contractual Term (years)	'1 year 11 months 5 days
Restricted Stock Units expected to vest, Weighted Average Remaining Contractual Term (years)	'1 year 9 months 26 days
End of period, Aggregate intrinsic value	$42,693,348
Restricted Stock Units expected to vest, Aggregate intrinsic value	$36,112,306

Balance_Sheet_Items_Schedule_O

Balance Sheet Items (Schedule Of Inventory) (Details) (USD $)	Sep. 28, 2013	Dec. 29, 2012
Balance Sheet Items [Abstract]	'	'
Work-in-progress	$14,518,000	$9,867,000
Finished goods	17,506,000	13,681,000
Inventory, net	32,024,000	23,548,000	[1]
Inventory reserves	$6,300,000	$7,800,000
[1]	As Restated

Balance_Sheet_Items_Schedule_O1

Balance Sheet Items (Schedule Of Product Warranties) (Details) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 30, 2012
Balance Sheet Items [Abstract]	'	'
Balance, beginning of the period	$5,981	$5,415
Accrual for new warranties issued	402	1,311
Reduction for payments and product replacements	-868	-161
Adjustments related to changes in estimate of warranty accrual	-3,198	-1,312
Balance, end of the period	$2,317	$5,253

Investment_Securities_Availabl

Investment Securities (Available For Sale Investments) (Details) (USD $)	9 Months Ended		12 Months Ended
	Sep. 28, 2013		Dec. 29, 2012
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	$137,003,000		$152,826,000
Gross Unrealized Gains	547,000	[1]	928,000	[2]
Gross Unrealized Losses	-114,000	[1]	-17,000	[2]
Fair Value	137,436,000		153,737,000
Accrued interest on investments	400,000		900,000
US States And Municipal Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	200,000		'
Gross Unrealized Gains	2,000	[1]	'
Fair Value	202,000		'
Cash Equivalents [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	14,407,000		50,528,000
Fair Value	14,407,000		50,528,000
Cash Equivalents [Member] | Money Market Funds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	14,407,000		50,528,000
Fair Value	14,407,000		50,528,000
Short-Term Investments [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	13,223,000		10,883,000
Gross Unrealized Gains	452,000	[1]	548,000	[2]
Gross Unrealized Losses	-5,000	[1]	'
Fair Value	13,670,000		11,431,000
Short-Term Investments [Member] | Corporate Bonds And Notes [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	10,640,000		9,163,000
Gross Unrealized Gains	413,000	[1]	522,000	[2]
Gross Unrealized Losses	-5,000	[1]	'
Fair Value	11,048,000		9,685,000
Short-Term Investments [Member] | US Treasury And Government Agency Notes [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	2,383,000		'
Gross Unrealized Gains	37,000	[1]	'
Fair Value	2,420,000		'
Short-Term Investments [Member] | US States And Municipal Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	'		1,720,000
Gross Unrealized Gains	'		26,000	[2]
Fair Value	'		1,746,000
Long-Term Investment Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	109,373,000		91,415,000
Gross Unrealized Gains	95,000	[1]	380,000	[2]
Gross Unrealized Losses	-109,000	[1]	-17,000	[2]
Fair Value	109,359,000		91,778,000
Long-Term Investment Securities [Member] | Corporate Bonds And Notes [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	77,833,000		53,567,000
Gross Unrealized Gains	54,000	[1]	329,000	[2]
Gross Unrealized Losses	-97,000	[1]	-16,000	[2]
Fair Value	77,790,000		53,880,000
Long-Term Investment Securities [Member] | US Treasury And Government Agency Notes [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	29,453,000		33,830,000
Gross Unrealized Gains	37,000	[1]	25,000	[2]
Gross Unrealized Losses	-11,000	[1]	-1,000	[2]
Fair Value	29,479,000		33,854,000
Long-Term Investment Securities [Member] | Foreign Government And Agency Notes [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	1,646,000		4,018,000
Gross Unrealized Gains	3,000	[1]	26,000	[2]
Gross Unrealized Losses	-1,000	[1]	'
Fair Value	1,648,000		4,044,000
Long-Term Investment Securities [Member] | US States And Municipal Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Amortized Cost	441,000		'
Gross Unrealized Gains	1,000	[1]	'
Fair Value	$442,000		'
[1]	Gross unrealized gains include accrued interest on investments of $0.4 million. The remainder of the gross unrealized gains and losses are included in the interim Condensed Consolidated Balance Sheet as Accumulated other comprehensive income (loss).
[2]	Gross unrealized gains include accrued interest on investments of $0.9 million. The remainder of the gross unrealized gains and losses are included in the interim Condensed Consolidated Balance Sheet as Accumulated other comprehensive income (loss).

Credit_Facility_Details

Credit Facility (Details) (Revolving Credit Facility [Member], USD $)	Sep. 28, 2013
Line of Credit Facility [Line Items]	'
Credit facility line of credit	$100,000,000
Line of credit, amount drawn	0
Minimum [Member]	'
Line of Credit Facility [Line Items]	'
Margin rates	1.75%
Maximum [Member]	'
Line of Credit Facility [Line Items]	'
Credit facility line of credit	$150,000,000
Margin rates	2.25%

Income_Taxes_Details

Income Taxes (Details) (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Sep. 30, 2012

Jul. 01, 2012

Apr. 01, 2012

Jun. 29, 2013

Jul. 01, 2012

Sep. 28, 2013

Sep. 30, 2012

Income Taxes [Abstract]

'

'

'

'

'

'

'

'

'

'

Provision for income taxes

$4,195,000

$4,602,000

[1]

$4,164,000

[1]

($5,515,000)

[1]

$65,000

[1]

$55,240,000

[1]

$8,766,000

[1]

$55,305,000

[1]

$12,961,000

$49,790,000

[1]

Income tax recovery related to unrecognized tax benefit accrual

'

'

'

'

'

'

'

'

'

5,500,000

Increase (Decrease) in the provision for income taxes

9,700,000

'

'

'

'

'

'

'

-36,900,000

'

Tax provision of stock option related loss carryfowards

1,700,000

'

'

'

'

'

'

'

'

'

Tax provision relating to prior year true ups

2,200,000

'

'

'

'

'

'

'

2,500,000

'

Tax provision relating to intercompany transactions

2,900,000

'

'

'

'

'

'

'

4,500,000

'

Increase in deferred income tax from acquired goodwill

1,000,000

'

'

'

'

'

'

'

1,600,000

'

Income tax provision related to an intercompany dividend

'

'

'

'

'

'

'

'

20,000,000

'

Reduction in tax expense related to taxable income related to dividends offset by available stock-option-related loss carryforwards

'

'

'

'

'

'

'

'

18,400,000

'

Effective tax rate

285.00%

'

'

2.00%

'

'

'

'

-456.00%

-17.00%

Federal statutory rate

'

'

'

'

'

'

'

'

35.00%

'

Unrecognized tax benefits, liability

$89,500,000

'

'

'

'

'

'

'

$89,500,000

'

[1]

As Restated

Net_Loss_Per_Share_Schedule_Of

Net Loss Per Share (Schedule Of Net Income Per Share) (Details) (USD $)

3 Months Ended

6 Months Ended

9 Months Ended

In Thousands, except Share data, unless otherwise specified

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Sep. 30, 2012

Jul. 01, 2012

Apr. 01, 2012

Jun. 29, 2013

Jul. 01, 2012

Sep. 28, 2013

Sep. 30, 2012

Net Loss Per Share [Abstract]

'

'

'

'

'

'

'

'

'

'

Net loss

($2,724)

[1]

($4,683)

[1]

($8,400)

[1]

($274,524)

[1]

$351

[1]

($64,782)

[1]

($13,083)

[1]

($64,431)

[1]

($15,807)

[1]

($338,955)

[1]

Basic weighted average common shares outstanding

205,377

[2]

'

'

209,512

[1],[2]

'

'

'

'

204,269

[2]

221,323

[1],[2]

Diluted weighted average common shares outstanding

205,377

[2]

'

'

209,512

[1],[2]

'

'

'

'

204,269

[2]

221,323

[1],[2]

Basic net income per share

($0.01)

($0.02)

[1]

($0.04)

[1]

($1.31)

[1]

$0

[1]

($0.28)

[1]

($0.06)

[1]

($0.28)

[1]

($0.08)

($1.53)

[1]

Diluted net income per share

($0.01)

($0.02)

[1]

($0.04)

[1]

($1.31)

[1]

$0

[1]

($0.28)

[1]

($0.06)

[1]

($0.28)

[1]

($0.08)

($1.53)

[1]

Antidilutive securities excluded from computation of earnings per share

2,100,000

'

'

1,000,000

'

'

'

'

2,100,000

1,800,000

[1]

As Restated

[2]

PMC-Sierra Ltd. special shares are included in the calculation of basic and diluted weighted average common shares outstanding.

Error_Corrections_Summary_Of_E

Error Corrections (Summary Of Effects On The Consolidated Balance Sheet) (Details) (USD $)

Sep. 28, 2013

Jun. 29, 2013

Mar. 30, 2013

Dec. 29, 2012

Sep. 30, 2012

Jul. 01, 2012

Dec. 31, 2011

In Thousands, unless otherwise specified

Prepaid expenses

$1,538

$6,560

[1]

$15,944

[1]

$19,152

[1]

'

'

'

Goodwill and other intangible assets, net

'

360,024

[1]

370,498

[1]

381,087

[1]

'

'

'

Total assets

880,435

900,025

[1]

898,129

[1]

894,773

[1]

'

'

'

Liability for unrecognized tax benefits - non-current

34,886

34,363

[1]

35,243

[1]

34,957

[1]

'

'

'

Accrued liabilities

61,893

71,997

[1]

65,385

[1]

72,282

[1]

'

'

'

Deferred tax and other long-term tax liabilities

'

44,145

[1]

42,884

[1]

41,936

[1]

'

'

'

Common stock and additional paid in capital

'

1,579,166

[1]

1,575,453

[1]

1,553,137

[1]

'

'

'

Accumulated deficit

-941,265

-932,656

[1]

-926,226

[1]

-917,825

[1]

'

'

'

Total stockholders' equity

640,857

[1]

645,730

[1]

649,399

[1]

635,928

[1]

631,990

[1]

919,539

[1]

1,106,467

[1]

Total liabilities and stockholders' equity

880,435

900,025

[1]

898,129

[1]

894,773

[1]

'

'

'

As Previously Reported [Member]

'

'

'

'

'

'

'

Prepaid expenses

'

2,856

10,441

11,851

'

'

'

Goodwill and other intangible assets, net

'

360,024

370,498

381,087

'

'

'

Total assets

'

896,857

892,626

887,472

'

'

'

Liability for unrecognized tax benefits - non-current

'

28,944

29,614

29,236

'

'

'

Accrued liabilities

'

74,887

65,385

72,282

'

'

'

Deferred tax and other long-term tax liabilities

'

47,282

45,909

44,849

'

'

'

Common stock and additional paid in capital

'

1,552,145

1,549,830

1,527,710

'

'

'

Accumulated deficit

'

-909,616

-903,716

-896,891

'

'

'

Total stockholders' equity

'

641,953

646,490

631,435

'

'

'

Total liabilities and stockholders' equity

'

$896,857

$892,626

$887,472

'

'

'

[1]

As Restated

Error_Corrections_Summary_Of_E1

Error Corrections (Summary Of Effects On The Consolidated Statements Of Operations) (Details) (USD $)	3 Months Ended												6 Months Ended				9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013		Jun. 29, 2013		Mar. 30, 2013		Sep. 30, 2012		Jul. 01, 2012		Apr. 01, 2012		Jun. 29, 2013		Jul. 01, 2012		Sep. 28, 2013		Sep. 30, 2012
Research and development	$50,733		$51,681	[1]	$54,624	[1]	$55,604	[1]	'		'		$106,305	[1]	'		$157,038		$171,374	[1]
(Provision for) recovery of income taxes	-4,195		-4,602	[1]	-4,164	[1]	5,515	[1]	-65	[1]	-55,240	[1]	-8,766	[1]	-55,305	[1]	-12,961		-49,790	[1]
Net loss	-2,724	[1]	-4,683	[1]	-8,400	[1]	-274,524	[1]	351	[1]	-64,782	[1]	-13,083	[1]	-64,431	[1]	-15,807	[1]	-338,955	[1]
Net income per common share - basic	($0.01)		($0.02)	[1]	($0.04)	[1]	($1.31)	[1]	$0	[1]	($0.28)	[1]	($0.06)	[1]	($0.28)	[1]	($0.08)		($1.53)	[1]
Net income per common share - diluted	($0.01)		($0.02)	[1]	($0.04)	[1]	($1.31)	[1]	$0	[1]	($0.28)	[1]	($0.06)	[1]	($0.28)	[1]	($0.08)		($1.53)	[1]
As Previously Reported [Member]	'		'		'		'		'		'		'		'		'		'
Research and development	'		54,571		54,624		'		'		'		109,195		'		'		'
(Provision for) recovery of income taxes	'		-1,181		-2,589		5,577		-519		-57,811		-3,770		-58,330		'		-52,753
Net loss	'		($4,152)		($6,825)		($275,907)		($103)		($67,353)		($10,977)		($67,456)		'		($343,363)
Net income per common share - basic	'		($0.02)		($0.03)		($1.32)		$0		($0.29)		($0.05)		($0.30)		'		($1.55)
Net income per common share - diluted	'		($0.02)		($0.03)		($1.32)		$0		($0.29)		($0.05)		($0.30)		'		($1.55)
[1]	As Restated

Stock_Repurchase_Program_And_A1

Stock Repurchase Program And Accelerated Stock Buyback (Details) (USD $)	0 Months Ended	3 Months Ended				9 Months Ended				12 Months Ended
	Oct. 05, 2012	Sep. 28, 2013		Sep. 30, 2012		Sep. 28, 2013		Sep. 30, 2012		Dec. 29, 2012	2-May-12
Forward Contract Indexed to Issuer's Equity [Line Items]	'	'		'		'		'		'	'
Share repurchase plan, authorized amount	'	'		'		'		'		$275,000,000	'
Stock repurchased of common stock, shares	4,600,788	'		'		'		'		'	'
Repurchase of common stock, value	'	17,096,000	[1]	25,024,000	[1]	22,603,000	[1]	180,807,000	[1]	'	'
Share repurchase plan, authorized amount available	'	182,600,000		'		182,600,000		'		'	'
Accelerated stock buyback	'	'		'		'		'		'	160,000,000
Employee equity grants	'	'		'		'		'		40,000,000	'
Shares repurchased and retired	'	'		'		5,200,000		'		'	'
Shares repurchased and retired, value	'	'		'		30,600,000		'		'	'
Accelerated Stock Buyback [Member]	'	'		'		'		'		'	'
Forward Contract Indexed to Issuer's Equity [Line Items]	'	'		'		'		'		'	'
Stock repurchased of common stock, shares	'	'		'		'		'		26,829,309	'
Accelerated Stock Buyback [Member] | Goldman, Sachs & Co. [Member]	'	'		'		'		'		'	'
Forward Contract Indexed to Issuer's Equity [Line Items]	'	'		'		'		'		'	'
Stock repurchased of common stock, shares	'	'		'		'		22,228,520		'	'
Common Stock [Member]	'	'		'		'		'		'	'
Forward Contract Indexed to Issuer's Equity [Line Items]	'	'		'		'		'		'	'
Stock repurchased of common stock, shares	'	2,691,000		4,281,000		3,594,000		27,395,000		'	'
Repurchase of common stock, value	'	$2,000		$4,000		$3,000		$27,000		'	'
[1]	As Restated