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USDtruefalse$D2013Q2_CommercialMortgageLoanMemberhttp://www.sec.gov/CIK0000355429duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseCommercial mortgage loansus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisxbrldihttp://xbrl.org/2006/xbrldipl_CommercialMortgageLoanMemberus-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$nanafalse0Commercial mortgage loans2true 3us-gaap_FinancingReceivableAllowanceForCreditLossesLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Mortgage loans3false 4pl_MortgageLoansOnRealEstateParticipatingLoanspl_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse705700000705700000USD$falsetruefalse2truefalsefalse705700000705700000USD$falsetruefalse3truefalsefalse817300000817300000USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents the amount of mortgage loans as of the balance sheet date which have a feature providing the entity a participating interest in the cash flows from the underlying real estate.No definition available.false2Mortgage loans having participation feature4false 4pl_MortgageLoansOnRealEstateParticipatingLoansIncomepl_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse58000005800000USD$falsefalsefalse2truefalsefalse92000009200000USD$falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of income earned during the period on mortgage loans, which have a feature providing the entity a participating interest in the cash flows from the underlying real estate.No definition available.false2Income recognized on participating mortgage loans5false 4pl_FinancingReceivableNonperformingForeclosedAndRestructuredLoansToInvestedAssetsPercentagepl_falsenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.00050.0005falsefalsefalse2truetruefalse0.00050.0005falsefalsefalse3falsefalsefalse00falsefalsefalsenum:percentItemTypepureRepresents the maximum amount of nonperforming mortgage loans, foreclosed properties and restructured loans pursuant to a pooling and servicing agreement, as a percent of invested assets.No definition available.false0Maximum nonperforming mortgage loans, foreclosed properties and restructured loans to invested assets (as a percent)6false 4pl_FinancingReceivableAmountOfNonperformingForeclosedAndRestructuredLoanspl_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1760000017600000USD$falsefalsefalse2truefalsefalse1760000017600000USD$falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the maximum amount of nonperforming loans, foreclosed properties, and restructured loans pursuant to a pooling and servicing agreement.No definition available.false2Maximum nonperforming mortgage loans, foreclosed properties and restructured loans pursuant to pooling and servicing agreement7false 4pl_FinancingReceivableLoanCategoriesNumberpl_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse22falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of categories of loans.No definition available.false256Number of loan categories8false 4pl_FinancingReceivableNotSubjectToPoolingAndServicingAgreementNonperformingAmountpl_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1540000015400000USD$falsefalsefalse2truefalsefalse1540000015400000USD$falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of financing receivables not subject to a pooling and servicing agreement that are nonperforming.No definition available.false2Nonperforming loans not subject to a pooling and servicing agreement9false 4pl_FinancingReceivableSubjectToPoolingAndServicingAgreementNonperformingOrRestructuredAmountpl_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse22000002200000USD$falsefalsefalse2truefalsefalse22000002200000USD$falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of financing receivables subject to a pooling and servicing agreement that are nonperforming or have been restructured under the terms and conditions of the pooling and service agreement.No definition available.false2Loans subject to a pooling and servicing agreement which are either nonperforming or restructured10false 4pl_NumberOfNonperformingFinancingReceivableSubjectToPoolingAndServicingAgreementWhichHaveBeenRestructuredpl_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of nonperforming financing receivables subject to a pooling and servicing agreement, which have been restructured under the terms and conditions of the pooling and servicing agreement.No definition available.false256Number of nonperforming loans subject to a pooling and servicing agreement which have been restructured11true 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doubtful of collection that were previously charged off.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 false2Recoveries15false 5us-gaap_ProvisionForLoanLeaseAndOtherLossesus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse68260006826000USD$falsefalsefalse3truefalsefalse68680006868000USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe sum of the periodic provision charged to earnings, based on an assessment of uncollectibility from the counterparty on account of loan, lease or other credit losses, to reduce these accounts to the amount that approximates their net realizable value.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) 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