2.4.0.8201300 - Disclosure - Fair Value Measurements and Credit Concentration (Policies)truefalsefalse1false falsefalseFROM_Jan01_2013_TO_Jun30_2013http://www.sec.gov/CIK0000922224duration2013-01-01T00:00:002013-06-30T00:00:001true 1us-gaap_FairValueDisclosuresAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Fair Value Measurements and Credit Concentration [Abstract]2false 2us-gaap_FairValueTransferPolicyPolicyTextBlockus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p style='margin-top:0pt; margin-bottom:0pt'><font style="font-family:Times New Roman;font-size:10pt;margin-left:0px;">Transfers between levels are recognized at end-of-reporting-period values. </font></p>falsefalsefalsenonnum:textBlockItemTypenaDisclosure of accounting policy for determining when transfers between levels are recognized.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 false0Fair Value MeasurementsfalseFair Value Measurements and Credit Concentration (Policies)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://pplweb.com/role/DisclosureFairValueMeasurementsAndCreditConcentrationPolicies12