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Fair Value of Financial Assets and Liabilities - Additional Information (Detail) (USD $) | 12 Months Ended | 3 Months Ended | 1 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Mar. 31, 2013 | Apr. 30, 2013 | Jan. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Fair value liabilities Level 2 | $ 0 plpc_FairValueLiabilitiesLevelTwoTransfersInAndOutAmount |  |  |
Additional earn-out consideration payment |  |  |  | 1,200,000 plpc_AdditionalEarnOutContingentConsiderationPaymentMaximum
Forma Line Industries CC [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Accrued liability additional earn out consideration payment |  | 100,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = plpc_FormaLineIndustriesCcMember |  |
Period of earn-out contingent consideration |  | 1 year |  |
Australian Electricity Systems PTY Ltd [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Accrued liability additional earn out consideration payment |  |  | $ 400,000 us-gaap_PaymentsToAcquireBusinessesGross / dei_LegalEntityAxis = plpc_AustralianElectricitySystemsPtyLtdMember |

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- Definition Fair value liabilities level two transfers in and out amount. + References No definition available. + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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