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CHANGES IN EQUITY (Policies) | 9 Months Ended
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Jul. 29, 2018
CHANGES IN EQUITY [Abstract] |
Treasury Stock | We record treasury stock purchases under the cost method, and would employ the average cost method (with average cost being determined separately for each share repurchase program), in the event we subsequently reissue shares.

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- Definition Disclosure of accounting policy for treasury stock valuation, including method of recording repurchases (cost or par value method) and method for valuing subsequent resale. + References No definition available. + Details
Name: | plab_TreasuryStockPolicyTextBlock
Namespace Prefix: | plab_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration