XML 60 R42.htm IDEA: XBRL DOCUMENT v2.4.0.8

Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Commitments And Contingencies Disclosure [Abstract]
Purchase commitments	$ 2.5	$ 7.2

X

- Definition

Payments for purchase commitment.

+ References

No definition available.

+ Details

Name:	ptgi_PaymentsForPurchaseCommitment
Namespace Prefix:	ptgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

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