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 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeAlternativeStatementTable |
 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateExcludingREITs |
 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateExcludingREITsStatementTable |
 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateInvestmentTrusts |
 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateInvestmentTrustsStatementTable |
 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncome |
 | us-gaap:GrossProfit | summation-item | http://fasb.org/us-gaap/role/statement/StatementOfIncome |
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 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInsuranceBasedRevenue |
 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInsuranceBasedRevenueStatementTable |
 | us-gaap:RevenuesAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeSecuritiesBasedIncome |
 | us-gaap:RevenuesAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeSecuritiesBasedIncomeStatementTable |
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 | us-gaap:GrossProfitAbstract | domain-member | http://fasb.org/us-gaap/role/disclosure/InvestmentsEquityMethodAndJointVenturesScheduleOfEquityMethodInvestmentsTable |
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 | us-gaap:EntityWideRevenueMajorCustomerLineItems | parent-child | http://fasb.org/us-gaap/role/disclosure/SegmentReporting |
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 | us-gaap:SegmentReportingInformationRevenueAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/SegmentReporting |
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 | us-gaap:EntityWideRevenueMajorCustomerLineItems | domain-member | http://fasb.org/us-gaap/role/disclosure/SegmentReportingScheduleOfEntityWideRevenueByMajorCustomersByReportingSegmentsTable |
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 | us-gaap:GrossProfitAbstract | domain-member | http://fasb.org/us-gaap/role/disclosure/SECDisclosureSecurityRegisteredOrBeingRegisteredAffiliateCollateralizedSecurityTable |
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