 | us-gaap:RestrictedCashAndCashEquivalentsCurrentAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperations |
 | us-gaap:RestrictedInvestmentsCurrent | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperations |
 | us-gaap:OtherRestrictedAssetsCurrent | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperations |
 | us-gaap:RestrictedCashAndInvestmentsCurrent | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperations |
 | us-gaap:RestrictedCashAndCashEquivalentsCurrentAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperationsStatementTable |
 | us-gaap:RestrictedInvestmentsCurrent | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperationsStatementTable |
 | us-gaap:OtherRestrictedAssetsCurrent | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperationsStatementTable |
 | us-gaap:RestrictedCashAndInvestmentsCurrent | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified-RealEstateOperationsStatementTable |
 | us-gaap:RestrictedCashAndCashEquivalentsCurrentAbstract | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:RestrictedInvestmentsCurrent | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:OtherRestrictedAssetsCurrent | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:RestrictedCashAndInvestmentsCurrent | parent-child | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassified |
 | us-gaap:RestrictedCashAndCashEquivalentsCurrentAbstract | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedStatementTable |
 | us-gaap:RestrictedInvestmentsCurrent | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedStatementTable |
 | us-gaap:OtherRestrictedAssetsCurrent | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedStatementTable |
 | us-gaap:RestrictedCashAndInvestmentsCurrent | domain-member | http://fasb.org/us-gaap/role/statement/StatementOfFinancialPositionClassifiedStatementTable |