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 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 815

 -SubTopic 10

 -Section 50

 -Paragraph 8

 -Subparagraph (c)

 -URI http://asc.fasb.org/extlink&amp;oid=7476318&amp;loc=d3e41678-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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 -Name FASB Staff Position (FSP)

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 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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 -Publisher FASB

 -Name Accounting Standards Codification

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 -Section 50

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 -URI http://asc.fasb.org/extlink&amp;oid=7476318&amp;loc=d3e41678-113959



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</LabelSeparator><CurrencyCode>USD</CurrencyCode><FootnoteIndexer /><hasSegments>true</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName /><CurrencySymbol>$</CurrencySymbol><contextRef><ContextID>I2013Q2_FreeStandingDerivativeMember</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0000355429</EntityValue><PeriodDisplayName /><PeriodType>instant</PeriodType><PeriodStartDate>2013-06-30T00:00:00</PeriodStartDate><PeriodEndDate>0001-01-01T00:00:00</PeriodEndDate><Segments><anyType xsi:type="Segment"><IsDefaultForEntity>false</IsDefaultForEntity><Name /><IsFromEntityGroup>false</IsFromEntityGroup><ValueName>Free-Standing derivatives</ValueName><ValueType>us-gaap_DerivativeInstrumentRiskAxis</ValueType><Namespace>xbrldi</Namespace><Schema>http://xbrl.org/2006/xbrldi</Schema><DimensionInfo><Id>pl_FreeStandingDerivativeMember</Id><dimensionId>us-gaap_DerivativeInstrumentRiskAxis</dimensionId><type>explicitMember</type></DimensionInfo></anyType></Segments><Scenarios /></contextRef><UPS><UnitProperty><UnitID>USD</UnitID><UnitType>Standard</UnitType><StandardMeasure><MeasureSchema>http://www.xbrl.org/2003/iso4217</MeasureSchema><MeasureValue>USD</MeasureValue><MeasureNamespace>iso4217</MeasureNamespace><MeasureDescription /><MeasureType /></StandardMeasure><MultiplyMeasures><Measure><MeasureSchema /><MeasureValue /><MeasureNamespace /><MeasureDescription /><MeasureType /></Measure><Measure><MeasureSchema /><MeasureValue /><MeasureNamespace /><MeasureDescription /><MeasureType /></Measure></MultiplyMeasures><NumeratorMeasure><MeasureSchema /><MeasureValue /><MeasureNamespace /><MeasureDescription /><MeasureType /></NumeratorMeasure><DenominatorMeasure><MeasureSchema /><MeasureValue /><MeasureNamespace /><MeasureDescription /><MeasureType /></DenominatorMeasure><Scale>0</Scale></UnitProperty></UPS><CurrencyCode>USD</CurrencyCode><OriginalCurrencyCode>USD</OriginalCurrencyCode></MCU><CurrencySymbol>$</CurrencySymbol><Labels><Label Key="us-gaap_DerivativeInstrumentRiskAxis:pl_FreeStandingDerivativeMember" Id="0" Label="Free-Standing derivatives" /><Label Key="Calendar" Id="1" Label="6/30/2013" /></Labels></OriginalInstanceReportColumn><ElementDataType>na</ElementDataType><SimpleDataType>na</SimpleDataType><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>Free-Standing derivatives</Label></Row><Row FlagID="0"><Id>24</Id><IsAbstractGroupTitle>true</IsAbstractGroupTitle><LabelSeparator>

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 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 815

 -SubTopic 10

 -Section 50

 -Paragraph 8

 -Subparagraph (c)

 -URI http://asc.fasb.org/extlink&amp;oid=7476318&amp;loc=d3e41678-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name FASB Staff Position (FSP)

 -Number FIN39-1

 -Paragraph 10B

 -Subparagraph a

 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 815

 -SubTopic 10

 -Section 50

 -Paragraph 8

 -Subparagraph (b)

 -URI http://asc.fasb.org/extlink&amp;oid=7476318&amp;loc=d3e41678-113959



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 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 815

 -SubTopic 10

 -Section 50

 -Paragraph 8

 -Subparagraph (c)

 -URI http://asc.fasb.org/extlink&amp;oid=7476318&amp;loc=d3e41678-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name FASB Staff Position (FSP)

 -Number FIN39-1

 -Paragraph 10B

 -Subparagraph a

 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 815

 -SubTopic 10

 -Section 50

 -Paragraph 8

 -Subparagraph (c)

 -URI http://asc.fasb.org/extlink&amp;oid=7476318&amp;loc=d3e41678-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name FASB Staff Position (FSP)

 -Number FIN39-1

 -Paragraph 10B

 -Subparagraph a

 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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