v3.25.2
Shareholder Report, Holdings (Details)
Jun. 30, 2025
C000005479 | American Tower  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000005479 | Equinix  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000005479 | Welltower  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000005479 | Prologis  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000005479 | Public Storage  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000005479 | Regency Centers  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000005479 | Essex Property Trust  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000005479 | Simon Property Group  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000005479 | Ventas  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000005479 | AvalonBay Communities  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000005479 | Apartment Residential  
Holdings [Line Items]  
Percent of Net Asset Value 20.50%
C000005479 | Industrial  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
C000005479 | Infrastructure  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000005479 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
C000005479 | Data Centers  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
C000005479 | Self Storage  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000005479 | Shopping Center  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000005479 | Regional Mall  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000005479 | Office  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000005479 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000005480 | American Tower  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000005480 | Equinix  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000005480 | Welltower  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000005480 | Prologis  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000005480 | Public Storage  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000005480 | Regency Centers  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000005480 | Essex Property Trust  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000005480 | Simon Property Group  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000005480 | Ventas  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000005480 | AvalonBay Communities  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000005480 | Apartment Residential  
Holdings [Line Items]  
Percent of Net Asset Value 20.50%
C000005480 | Industrial  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
C000005480 | Infrastructure  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000005480 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
C000005480 | Data Centers  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
C000005480 | Self Storage  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000005480 | Shopping Center  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000005480 | Regional Mall  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000005480 | Office  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000005480 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%
C000166334 | American Tower  
Holdings [Line Items]  
Percent of Net Asset Value 9.60%
C000166334 | Equinix  
Holdings [Line Items]  
Percent of Net Asset Value 8.90%
C000166334 | Welltower  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000166334 | Prologis  
Holdings [Line Items]  
Percent of Net Asset Value 6.50%
C000166334 | Public Storage  
Holdings [Line Items]  
Percent of Net Asset Value 5.70%
C000166334 | Regency Centers  
Holdings [Line Items]  
Percent of Net Asset Value 4.20%
C000166334 | Essex Property Trust  
Holdings [Line Items]  
Percent of Net Asset Value 4.10%
C000166334 | Simon Property Group  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000166334 | Ventas  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000166334 | AvalonBay Communities  
Holdings [Line Items]  
Percent of Net Asset Value 3.50%
C000166334 | Apartment Residential  
Holdings [Line Items]  
Percent of Net Asset Value 20.50%
C000166334 | Industrial  
Holdings [Line Items]  
Percent of Net Asset Value 15.60%
C000166334 | Infrastructure  
Holdings [Line Items]  
Percent of Net Asset Value 13.60%
C000166334 | Health Care  
Holdings [Line Items]  
Percent of Net Asset Value 11.40%
C000166334 | Data Centers  
Holdings [Line Items]  
Percent of Net Asset Value 9.10%
C000166334 | Self Storage  
Holdings [Line Items]  
Percent of Net Asset Value 8.80%
C000166334 | Shopping Center  
Holdings [Line Items]  
Percent of Net Asset Value 7.30%
C000166334 | Regional Mall  
Holdings [Line Items]  
Percent of Net Asset Value 3.80%
C000166334 | Office  
Holdings [Line Items]  
Percent of Net Asset Value 2.80%
C000166334 | Other Holdings Grouping  
Holdings [Line Items]  
Percent of Net Asset Value 7.10%