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COMMITMENTS AND CONTINGENCIES (Details) $ in Millions | Oct. 31, 2019 USD ($)
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COMMITMENTS AND CONTINGENCIES [Abstract] |
Outstanding purchase commitments | $ 130.3
Purchase commitments related to capital equipment | 111.8
Future capital lease | 30.8
Purchase commitments | $ 17.2

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- Definition Commitment amount intended to be financed under a capital lease. + References No definition available. + Details
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Namespace Prefix: | plab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services related to capital equipment. + References No definition available. + Details
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Namespace Prefix: | plab_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25383-109308 + Details
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