 | us-gaap:TreasuryStockCommonShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-RealEstateOperations |
 | us-gaap:TreasuryStockPreferredShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-RealEstateOperations |
 | us-gaap:TreasuryStockShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-RealEstateOperations |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-RealEstateOperationsStatementTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-RealEstateOperationsStatementTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-RealEstateOperationsStatementTable |
 | us-gaap:TreasuryStockCommonShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperations |
 | us-gaap:TreasuryStockPreferredShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperations |
 | us-gaap:TreasuryStockShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperations |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperationsStatementTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperationsStatementTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperationsStatementTable |
 | us-gaap:TreasuryStockCommonShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:TreasuryStockPreferredShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:TreasuryStockShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedStatementTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedStatementTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedStatementTable |
 | us-gaap:TreasuryStockCommonShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperations |
 | us-gaap:TreasuryStockPreferredShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperations |
 | us-gaap:TreasuryStockShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperations |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperationsStatementTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperationsStatementTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-DepositBasedOperationsStatementTable |
 | us-gaap:TreasuryStockCommonShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-InvestmentBasedOperations |
 | us-gaap:TreasuryStockPreferredShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-InvestmentBasedOperations |
 | us-gaap:TreasuryStockShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-InvestmentBasedOperations |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-InvestmentBasedOperationsStatementTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-InvestmentBasedOperationsStatementTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-InvestmentBasedOperationsStatementTable |
 | us-gaap:TreasuryStockCommonShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-SecuritiesBasedOperations |
 | us-gaap:TreasuryStockPreferredShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-SecuritiesBasedOperations |
 | us-gaap:TreasuryStockShares | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-SecuritiesBasedOperations |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-SecuritiesBasedOperationsStatementTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-SecuritiesBasedOperationsStatementTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionUnclassified-SecuritiesBasedOperationsStatementTable |
 | us-gaap:TreasuryStockCommonShares | parent-child | http://fasb.org/us-gaap/role/disclosure/Equity |
 | us-gaap:TreasuryStockPreferredShares | parent-child | http://fasb.org/us-gaap/role/disclosure/Equity |
 | us-gaap:TreasuryStockShares | parent-child | http://fasb.org/us-gaap/role/disclosure/Equity |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/disclosure/EquityClassOfTreasuryStockTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/disclosure/EquityClassOfTreasuryStockTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/disclosure/EquityClassOfTreasuryStockTable |
 | us-gaap:TreasuryStockCommonShares | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations |
 | us-gaap:TreasuryStockPreferredShares | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations |
 | us-gaap:TreasuryStockShares | parent-child | http://fasb.org/us-gaap/role/disclosure/RegulatedOperations |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationEquityTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationEquityTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationEquityTable |
 | us-gaap:TreasuryStockCommonShares | domain-member | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationTable |
 | us-gaap:TreasuryStockPreferredShares | domain-member | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationTable |
 | us-gaap:TreasuryStockShares | domain-member | http://fasb.org/us-gaap/role/disclosure/RegulatedOperationsScheduleOfCapitalizationTable |