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Product Warranty Reserve (Details) (Warranty Reserves [Member], USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Warranty Reserves [Member]
Rollforward of the product warranty reserve
Balance at the beginning of period	$ 824	$ 536
Additions charged to income	1,009	1,968
Warranty usage	(649)	(1,467)
Currency translation	11	(213)
End of period balance	$ 1,195	$ 824

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