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Product Warranty Reserve - Roll Forward of Product Warranty Reserve (Detail) (Warranty Reserves [Member], USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2013 | Jun. 30, 2012
Warranty Reserves [Member] |  |
Valuation and Qualifying Accounts Disclosure [Line Items] |  |
Balance at the beginning of period | $ 1,229 | $ 824
Additions charged to income | 241 | 769
Warranty usage | (218) | (401)
Currency translation | (32) | (3)
End of period balance | $ 1,220 | $ 1,189

X
- Definition The expense against earnings for the period pertaining to specific warranty claims on the entity's goods and services granted to customers. + References No definition available. + Details
Name: | plpc_AdditionsChargedToIncome
Namespace Prefix: | plpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Total increase or decrease in the product warranty liability due to currency translation. + References No definition available. + Details
Name: | plpc_CurrencyTranslation
Namespace Prefix: | plpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims. + References No definition available. + Details
Name: | plpc_ProductWarrantyAccruals
Namespace Prefix: | plpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the aggregate decrease in the liability related to payments with cash or product to satisfy claims for product warranties. + References No definition available. + Details
Name: | plpc_WarrantyUsage
Namespace Prefix: | plpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration