PREPAID EXPENSES AND OTHER CURRENT ASSETS AND ACCRUED EXPENSES (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
PREPAID EXPENSES AND OTHER CURRENT ASSETS AND ACCRUED EXPENSES [Abstract]
Tax and interest payment related to settlement of state excise and sales tax contingencies	$ 0.1	$ 0.9
State excise and sales tax reserve	$ 9.9	$ 8.3

Carrying value as of the balance sheet date of liabilities incurred through that date and payable for statutory sales and use taxes, including value added tax as well as any related interest.

No definition available.

Name:	pgi_SalesandExciseTaxPayableWithRelatedInterest
Namespace Prefix:	pgi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant