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Debt and Credit Arrangements - Debt and Credit Arrangements (Parenthetical) (Detail) In Thousands, unless otherwise specified	Dec. 31, 2014 Brazilian Real Denominated Secured Notes Short Term Debt [Member] BRL	Dec. 31, 2014 Australian Dollar Denominated Term Loans Long-term Debt [Member] AUD	Dec. 31, 2013 Australian Dollar Denominated Term Loans Long-term Debt [Member]	Dec. 31, 2014 Brazilian Real Denominated Term Loan Long-Term Debt [Member] BRL	Dec. 31, 2014 Minimum [Member] Brazilian Real Denominated Secured Notes Short Term Debt [Member]	Dec. 31, 2013 Minimum [Member] Brazilian Real Denominated Secured Notes Short Term Debt [Member]	Dec. 31, 2014 Minimum [Member] Brazilian Real Denominated Term Loan Long-Term Debt [Member]	Dec. 31, 2014 Minimum [Member] USD Denominated Long-term Debt [Member]	Dec. 31, 2014 Maximum [Member] Brazilian Real Denominated Secured Notes Short Term Debt [Member]	Dec. 31, 2013 Maximum [Member] Brazilian Real Denominated Secured Notes Short Term Debt [Member]	Dec. 31, 2014 Maximum [Member] Brazilian Real Denominated Term Loan Long-Term Debt [Member]
Debt Instrument [Line Items]
Debt instrument interest rate		5.59%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = plpc_AustralianDollarDenominatedTermLoansLongTermDebtMember	6.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = plpc_AustralianDollarDenominatedTermLoansLongTermDebtMember		3.38%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ShortTermDebtTypeAxis = plpc_BrazilianRealDenominatedSecuredNotesShortTermDebtMember	3.25%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_RangeAxis = us-gaap_MinimumMember / us-gaap_ShortTermDebtTypeAxis = plpc_BrazilianRealDenominatedSecuredNotesShortTermDebtMember	4.50%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = plpc_BrazilianRealDenominatedTermLoanLongTermDebtMember / us-gaap_RangeAxis = us-gaap_MinimumMember	1.29%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = plpc_UsdDenominatedLongTermDebtMember / us-gaap_RangeAxis = us-gaap_MinimumMember	3.69%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ShortTermDebtTypeAxis = plpc_BrazilianRealDenominatedSecuredNotesShortTermDebtMember	3.60%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_RangeAxis = us-gaap_MaximumMember / us-gaap_ShortTermDebtTypeAxis = plpc_BrazilianRealDenominatedSecuredNotesShortTermDebtMember	8.12%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = plpc_BrazilianRealDenominatedTermLoanLongTermDebtMember / us-gaap_RangeAxis = us-gaap_MaximumMember
Debt instrument, face amount	4,805us-gaap_DebtInstrumentFaceAmount / us-gaap_ShortTermDebtTypeAxis = plpc_BrazilianRealDenominatedSecuredNotesShortTermDebtMember	1,065us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = plpc_AustralianDollarDenominatedTermLoansLongTermDebtMember		918us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = plpc_BrazilianRealDenominatedTermLoanLongTermDebtMember

X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration