 | us-gaap:EarningsPerShareAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeAlternative |
 | us-gaap:EarningsPerShareAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeAlternativeStatementTable |
 | us-gaap:EarningsPerShareAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateExcludingREITs |
 | us-gaap:EarningsPerShareAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateExcludingREITsStatementTable |
 | us-gaap:EarningsPerShareAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateInvestmentTrusts |
 | us-gaap:EarningsPerShareAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeRealEstateInvestmentTrustsStatementTable |
 | us-gaap:StockTransactionsParentheticalDisclosuresAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncome |
 | us-gaap:StockTransactionsParentheticalDisclosuresAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfShareholdersEquityAndOtherComprehensiveIncomeStatementTable |
 | us-gaap:EarningsPerShareAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncome |
 | us-gaap:EarningsPerShareAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeStatementTable |
 | us-gaap:StatementLineItems | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInterestBasedRevenue |
 | us-gaap:StatementLineItems | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInterestBasedRevenueStatementTable |
 | us-gaap:StatementLineItems | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInsuranceBasedRevenue |
 | us-gaap:StatementLineItems | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeInsuranceBasedRevenueStatementTable |
 | us-gaap:StatementLineItems | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfIncomeSecuritiesBasedIncome |
 | us-gaap:StatementLineItems | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfIncomeSecuritiesBasedIncomeStatementTable |
 | us-gaap:CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/Equity |
 | us-gaap:EarningsPerShareAbstract | parent-child | http://fasb.org/us-gaap/role/disclosure/Equity |
 | us-gaap:CommonStockNumberOfSharesParValueAndOtherDisclosuresAbstract | domain-member | http://fasb.org/us-gaap/role/disclosure/EquityScheduleOfStockByClassTable |