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FAIR VALUE MEASUREMENTS (Details) (USD $) In Thousands, unless otherwise specified | Feb. 01, 2015 | Nov. 02, 2014
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Fair Value Assets And Liabilities Measured On Recurring and Nonrecurring Basis [Line Items] |  |
Total assets | $ 0 us-gaap_AssetsFairValueDisclosure | $ 0 us-gaap_AssetsFairValueDisclosure
Total liabilities | 0 us-gaap_LiabilitiesFairValueDisclosure | 0 us-gaap_LiabilitiesFairValueDisclosure
Fair Value [Member] | 3.25% convertible senior notes due 2016 [Member] |  |
Fair and carrying values of the Company's convertible senior notes [Abstract] |  |
Convertible senior notes | 59,978 us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = plab_ConvertibleSeniorNotesDueOnApril2016Member | 122,544 us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = plab_ConvertibleSeniorNotesDueOnApril2016Member
Fair Value [Member] | 3.25% convertible senior notes due 2019 [Member] |  |
Fair and carrying values of the Company's convertible senior notes [Abstract] |  |
Convertible senior notes | 60,479 us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = plab_ConvertibleSeniorNotesDueOnApril2019Member | 0 us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = plab_ConvertibleSeniorNotesDueOnApril2019Member
Carrying Value [Member] | 3.25% convertible senior notes due 2016 [Member] |  |
Fair and carrying values of the Company's convertible senior notes [Abstract] |  |
Convertible senior notes | 57,500 us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = plab_ConvertibleSeniorNotesDueOnApril2016Member | 115,000 us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = plab_ConvertibleSeniorNotesDueOnApril2016Member
Carrying Value [Member] | 3.25% convertible senior notes due 2019 [Member] |  |
Fair and carrying values of the Company's convertible senior notes [Abstract] |  |
Convertible senior notes | $ 57,500 us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = plab_ConvertibleSeniorNotesDueOnApril2019Member | $ 0 us-gaap_ConvertibleDebtFairValueDisclosures / us-gaap_FairValueByMeasurementBasisAxis = us-gaap_CarryingReportedAmountFairValueDisclosureMember / us-gaap_LongtermDebtTypeAxis = plab_ConvertibleSeniorNotesDueOnApril2019Member

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Convertible Security -URI http://asc.fasb.org/extlink&oid=6509036 + Details
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