XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Fair Value of Financial Assets and Liabilities - Additional Information (Detail) | 6 Months Ended
--- | ---
Jun. 30, 2017 USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Abstract] |
Fair value liabilities Level 2 | $ 0

X
- Definition Fair value liabilities level two transfers in and out amount. + References No definition available. + Details
Name: | plpc_FairValueLiabilitiesLevelTwoTransfersInAndOutAmount
Namespace Prefix: | plpc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration