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Related Party Transactions - Additional Information (Detail) (USD $) | 12 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2014 Lease Property | Dec. 31, 2013 | Dec. 31, 2012 | Aug. 14, 2014 | Aug. 31, 2012 | Dec. 31, 2012 | May 09, 2013 | Mar. 20, 2014 | Nov. 12, 2013 | May 08, 2013
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares | 40,145 us-gaap_StockRepurchasedDuringPeriodShares | 89,807 us-gaap_StockRepurchasedDuringPeriodShares | 50,334 us-gaap_StockRepurchasedDuringPeriodShares |  |  |  |  |  |  |
Compensation payment received | $ 153,273 plpc_RelatedPartyTransactionReportableCompensationPayment |  |  |  |  |  |  |  |  |
Ryan Ruhlman employee years of service | 10 years |  |  |  |  |  |  |  |  |
Compensation attributable to stock option | 39,100 plpc_RelatedPartyTransactionShareBasedCompensation |  |  |  |  |  |  |  |  |
Service expense | 0 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty | 0 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty | 700,000 us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty |  |  |  |  |  |  |
Related party transactions number of property leased | 2 plpc_RelatedPartyTransactionsNumberOfPropertyLeased |  |  |  |  |  |  |  |  |
Related party transaction lease expenses | 300,000 plpc_RelatedPartyTransactionLeaseExpenses | 300,000 plpc_RelatedPartyTransactionLeaseExpenses | 300,000 plpc_RelatedPartyTransactionLeaseExpenses |  |  |  |  |  |  |
Related party transactions number of property rented | 2 plpc_RelatedPartyTransactionsNumberOfPropertyRented |  |  |  |  |  |  |  |  |
Rent Expenses | 200,000 plpc_RelatedPartyTransactionRentExpense | 300,000 plpc_RelatedPartyTransactionRentExpense | 300,000 plpc_RelatedPartyTransactionRentExpense |  |  |  |  |  |  |
Labor expense | $ 500,000 plpc_RelatedPartyTransactionLaborExpense | $ 300,000 plpc_RelatedPartyTransactionLaborExpense | $ 700,000 plpc_RelatedPartyTransactionLaborExpense |  |  |  |  |  |  |
Ownership percentage owned by related party | 50.00%plpc_RelatedPartyOwnershipPercentage |  |  |  |  |  |  |  |  |
Trust [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  | 34,106 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_TrustMember | 30,410 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_TrustMember |  |  |  |  |
Common shares price per share |  |  |  | $ 54.83 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_TrustMember | $ 54.92 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_TrustMember |  |  |  |  |
Number of trading days to be considered for average price of stock repurchased |  |  |  |  | 30 days |  |  |  |  |
Mckenna [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  | 4,100 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_MckennaMember |  |  |  |  |
Common shares price per share |  |  |  |  | $ 55.91 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_MckennaMember |  |  |  |  |
Number of trading days to be considered for average price of stock repurchased |  |  |  |  | 30 days |  |  |  |  |
Haag [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  |  | 7,408 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_HaagMember |  |  |  |
Common shares price per share |  |  | $ 54.71 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_HaagMember |  |  | $ 54.71 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_HaagMember |  |  |  |
Number of trading days to be considered for average price of stock repurchased |  |  |  |  |  | 30 days |  |  |  |
Ruhlman [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  |  |  | 9,757 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RuhlmanMember |  |  |
Common shares price per share |  |  |  |  |  |  | $ 76.87 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RuhlmanMember |  |  |
Robert G Ruhlman [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  |  |  |  | 2,098 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RobertRuhlmanMember | 25,000 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RobertRuhlmanMember |
Common shares price per share |  |  |  |  |  |  |  | $ 62.99 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RobertRuhlmanMember | $ 78.91 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RobertRuhlmanMember |
Number of trading days to be considered for average price of stock repurchased |  |  |  |  |  |  |  | 30 days | 30 days |
Dennis F Mckenna [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  |  |  |  |  | 2,750 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_DennisMckennaMember |
Common shares price per share |  |  |  |  |  |  |  |  | $ 78.91 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_DennisMckennaMember |
Number of trading days to be considered for average price of stock repurchased |  |  |  |  |  |  |  |  | 30 days |
J Cecil Curlee [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  |  |  |  |  | 2,500 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_CecilCurleeMember |
Common shares price per share |  |  |  |  |  |  |  |  | $ 78.91 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_CecilCurleeMember |
Number of trading days to be considered for average price of stock repurchased |  |  |  |  |  |  |  |  | 30 days |
Caroline S Vaccariello [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  |  |  |  |  | 1,750 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_CarolineVaccarielloMember |
Common shares price per share |  |  |  |  |  |  |  |  | $ 78.91 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_CarolineVaccarielloMember |
Number of trading days to be considered for average price of stock repurchased |  |  |  |  |  |  |  |  | 30 days |
Ryan Ruhlman [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  |  |  |  |  | 3,200 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RyanRuhlmanMember | 2,500 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RyanRuhlmanMember
Common shares price per share |  |  |  |  |  |  |  |  | $ 78.91 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RyanRuhlmanMember | $ 76.98 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_RyanRuhlmanMember
Number of trading days to be considered for average price of stock repurchased |  |  |  |  |  |  |  |  | 30 days | 30 days
David C Sunkle [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Purchase of common shares |  |  |  |  |  |  |  |  | 1,000 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_DavidSunkleMember | 3,000 us-gaap_StockRepurchasedDuringPeriodShares / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_DavidSunkleMember
Common shares price per share |  |  |  |  |  |  |  |  | $ 78.91 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_DavidSunkleMember | $ 76.98 plpc_StockRepurchasedDuringPeriodPricePerShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = plpc_DavidSunkleMember
Number of trading days to be considered for average price of stock repurchased |  |  |  |  |  |  |  |  | 30 days | 30 days

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- Definition Related party employee years of service. + References No definition available. + Details
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- Definition Related party ownership percentage. + References No definition available. + Details
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- Definition Related party transaction labor expense. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Related party transaction lease expenses. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Related party transaction rent expense. + References No definition available. + Details
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Namespace Prefix: | plpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Related party transaction reportable compensation payment. + References No definition available. + Details
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Namespace Prefix: | plpc_
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Balance Type: | credit
Period Type: | duration

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- Definition Related party transaction share based compensation. + References No definition available. + Details
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- Definition Related party transactions number of property leased. + References No definition available. + Details
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Period Type: | duration

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- Definition Related party transactions number of property rented. + References No definition available. + Details
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- Definition Stock repurchased during period price per share. + References No definition available. + Details
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- Definition Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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