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Income Taxes - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Reconciliation [Line Items] |  |  |
Foreign net operating loss carryforwards expiration period start year | 2017 |  |
Foreign net operating loss carryforwards expiration period end year | 2024 |  |
Valuation allowance | $ 3,614,000 us-gaap_DeferredTaxAssetsValuationAllowance | $ 1,420,000 us-gaap_DeferredTaxAssetsValuationAllowance |
Impact of valuation allowances on Income tax provision | 1,900,000 plpc_ValuationAllowancesCreditedToIncomeTaxProvision |  |
Net increase in valuation allowance from the prior year | 2,200,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |  |
Deferred tax liability not established by the company | 131,000,000 us-gaap_UndistributedEarningsOfForeignSubsidiaries |  |
Income taxes paid, net of refunds | 7,700,000 us-gaap_IncomeTaxesPaidNet | 19,900,000 us-gaap_IncomeTaxesPaidNet | 16,000,000 us-gaap_IncomeTaxesPaidNet
Recognized accrued interest and penalties lapsed | 100,000 plpc_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpenseMaximum | 100,000 plpc_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpenseMaximum | 100,000 plpc_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpenseMaximum
Payment of interest accrued | 600,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued | 600,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued | 600,000 us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued
Accrued penalties payment | 300,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued | 300,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued | 300,000 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued
Unrecognized tax benefits that would impact effective tax rate | 200,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | 0 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate | 700,000 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Scenario, Forecast [Member] |  |  |
Income Tax Reconciliation [Line Items] |  |  |
Decrease in unrecognized tax benefits within next fiscal year due to effective settlement | 600,000 us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember |  |
Maximum [Member] | Foreign Country [Member] |  |  |
Income Tax Reconciliation [Line Items] |  |  |
Foreign net operating loss carryforwards | 2,600,000 plpc_OperatingLossCarryforwardsAfterTax / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |
Minimum [Member] | Foreign Country [Member] |  |  |
Income Tax Reconciliation [Line Items] |  |  |
Foreign net operating loss carryforwards | $ 1,000,000 plpc_OperatingLossCarryforwardsAfterTax / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 + Details
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- Definition Amount of statutory penalties accrued for a tax position claimed or expected to be claimed by the entity, in its tax return. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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