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Acquisitions (Details) (USD $) | 12 Months Ended |  | 1 Months Ended |  | 1 Months Ended |  | 1 Months Ended |  | 1 Months Ended | 12 Months Ended |  | 1 Months Ended |  |  | 12 Months Ended |  | 1 Months Ended |  | 1 Months Ended |  |  | 1 Months Ended |
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Dec. 29, 2012 | Dec. 29, 2012 Customer relationships | Dec. 29, 2012 Trademarks | Dec. 29, 2012 Core and developed technology | Dec. 29, 2012 Ember Corporation | Jul. 03, 2012 Ember Corporation | Jul. 31, 2012 Ember Corporation Developed technology | Jul. 03, 2012 Ember Corporation Developed technology | Jul. 31, 2012 Ember Corporation Customer relationships | Jul. 03, 2012 Ember Corporation Customer relationships | Jul. 31, 2012 Ember Corporation Trademarks | Jul. 03, 2012 Ember Corporation Trademarks | Jul. 31, 2012 Ember Corporation In Process research and development | Dec. 29, 2012 Ember Corporation In Process research and development | Jul. 03, 2012 Ember Corporation In Process research and development | Sep. 30, 2012 Headquarters leases item | Sep. 28, 2012 Headquarters leases | Dec. 29, 2012 400 WCC | Dec. 29, 2012 200 WCC | Dec. 31, 2011 Spectra Linear | Jan. 25, 2011 Spectra Linear | Jan. 31, 2011 Spectra Linear Customer relationships | Jan. 25, 2011 Spectra Linear Customer relationships | Jan. 31, 2011 Spectra Linear Core and developed technology | Jan. 25, 2011 Spectra Linear Core and developed technology | Apr. 30, 2010 Silicon Clocks, Inc | Apr. 30, 2010 Silicon Clocks, Inc Developed technology | Apr. 30, 2010 Silicon Clocks, Inc Customer relationships | Apr. 30, 2010 Silicon Clocks, Inc In Process research and development | Oct. 31, 2010 Chip Sensors
Business acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price of acquisition |  |  |  |  |  | $ 79,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated fair value of contingent consideration |  |  |  |  |  | 4,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |
Minimum revenue of acquired products |  |  |  |  | 27,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net liabilities assumed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,000,000 |  |  |  |  |  |  |  |  |
Post combination expenses, additional compensation paid to employees of acquired entity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,500,000 |  |  |  |  |  |  |  |  |  |
Consideration paid in cash for acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21,000,000 |  |  |  |
Number of years over which minimum revenue generate |  |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase price allocation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Indefinite intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,810,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,470,000 |
Finite intangible assets |  |  |  |  |  |  |  | 17,800,000 |  | 5,620,000 |  | 910,000 |  |  |  |  |  |  |  |  |  |  | 1,400,000 |  | 16,560,000 |  | 230,000 | 30,000 |  |
Intangible assets |  |  |  |  |  | 39,140,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 17,960,000 |  |  |  |  | 9,730,000 |  |  |  | 9,100,000
Cash and cash equivalents |  |  |  |  |  | 3,115,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 514,000 |  |  |  |
Accounts receivable |  |  |  |  |  | 1,928,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,759,000 |  |  |  |  |  |  |  |  |
Inventories |  |  |  |  |  | 4,749,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,199,000 |  |  |  |  |  |  |  |  |
Other current assets |  |  |  |  |  | 324,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,658,000 |  |  |  |  | 473,000 |  |  |  |
Goodwill |  |  |  |  |  | 14,777,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,097,000 |  |  |  |  | 3,209,000 |  |  |  | 3,100,000
Deferred tax assets - non-current |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 12,316,000 |  |  |  |  | 11,521,000 |  |  |  |
Non-current deferred tax assets, net |  |  |  |  |  | 16,449,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other non-current assets |  |  |  |  |  | 1,776,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 597,000 |  |  |  |  | 322,000 |  |  |  |
Notes payable - current portion |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,641,000) |  |  |  |  |  |  |  |  |
Current liabilities |  |  |  |  |  | (3,287,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,112,000) |  |  |  |  | (1,338,000) |  |  |  |
Deferred tax liabilities - non-current |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,406,000) |  |  |  |
Net tangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (500,000)
Total purchase price |  |  |  |  |  | 78,971,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28,579,000 |  |  |  |  | 21,025,000 |  |  |  | 11,700,000
Non-current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (3,254,000) |  |  |  |  |  |  |  |  |
Weighted-Average Amortization Period | 10 years | 9 years | 12 years | 10 years |  |  | 11 years |  | 9 years |  | 12 years |  |  |  |  |  |  |  |  |  |  | 10 years |  | 10 years |  |  | 3 years | 2 years |  |
Discount rate applicable to the cash flows (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  | 12.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 19.00% |
Estimated costs |  |  |  |  |  |  |  |  |  |  |  |  | 11,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase option price for buildings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 44,300,000 | 50,100,000 |  |  |  |  |  |  |  |  |  |  |
Buildings |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 90,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Leasehold interest in ground leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,840,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired unfavorable leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (11,925,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Lease-related charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (8,000) |  |  |  |  |  |  |  |  |  |  |  |  |
Net gain on purchase | (8,457,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (8,457,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 94,350,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life of building |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 40 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful life of leasehold interest in ground leases |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 86 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of leases purchase price fixed |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The amount of acquisition cost of a business combination allocated to inventory, including finished goods, work-in-process, and raw materials. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of acquisition cost of a business combination allocated to prepaid expenses and other current assets. Does not include amounts allocated to cash and cash equivalents, marketable securities, receivables, inventory, and assets not to be used. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of acquisition cost of a business combination allocated to receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of acquisition cost of a business combination allocated to current liabilities of the acquired entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Gross amount of acquisition cost of a business combination allocated to noncurrent deferred tax assets. + References No definition available. + Details
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- Definition Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 52 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 53 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of acquisition cost of a business combination allocated to net tangible assets. + References No definition available. + Details
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- Definition The amount of acquisition cost of a business combination allocated to noncurrent liabilities of the acquired entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Amount of acquisition cost of a business combination allocated to other noncurrent assets not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 98-1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 37 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition In a business combination in which the amount of net identifiable assets acquired and liabilities assumed exceeds the aggregate consideration transferred or to be transferred (as defined), this element represents the amount of gain recognized by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 36, 37, 38 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6571-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6527-128477 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (f)(1) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph o(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6393-128476 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6396-128476 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6387-128476 + Details
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- Definition This element represents the acquisition-date fair value of the total consideration transferred which consists of the sum of the acquisition-date fair values of the assets transferred by the acquirer, the liabilities incurred by the acquirer to former owners of the acquiree, and the equity interests issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 39, 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e6927-128479 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 12, 13, 14, 20, A107 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=9154965&loc=d3e2207-128464 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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