Shareholder Report, Holdings (Details)	Jun. 30, 2025
C000005445 \| NVIDIA
Holdings [Line Items]
Percent of Net Asset Value	14.10%
C000005445 \| Microsoft
Holdings [Line Items]
Percent of Net Asset Value	13.90%
C000005445 \| Apple
Holdings [Line Items]
Percent of Net Asset Value	7.80%
C000005445 \| Amazon.com
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000005445 \| Meta Platforms
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000005445 \| Alphabet
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000005445 \| Carvana
Holdings [Line Items]
Percent of Net Asset Value	3.30%
C000005445 \| Visa
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000005445 \| Broadcom
Holdings [Line Items]
Percent of Net Asset Value	3.10%
C000005445 \| Netflix
Holdings [Line Items]
Percent of Net Asset Value	2.90%
C000005445 \| Information Technology
Holdings [Line Items]
Percent of Net Asset Value	46.70%
C000005445 \| Communication Services
Holdings [Line Items]
Percent of Net Asset Value	15.70%
C000005445 \| Consumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	15.70%
C000005445 \| Financials
Holdings [Line Items]
Percent of Net Asset Value	8.70%
C000005445 \| Health Care
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000005445 \| Industrials & Business Services
Holdings [Line Items]
Percent of Net Asset Value	3.50%
C000005445 \| Utilities
Holdings [Line Items]
Percent of Net Asset Value	0.90%
C000005445 \| Consumer Staples
Holdings [Line Items]
Percent of Net Asset Value	0.80%
C000005445 \| Materials
Holdings [Line Items]
Percent of Net Asset Value	0.70%
C000005445 \| Other Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	0.60%
C000005446 \| NVIDIA
Holdings [Line Items]
Percent of Net Asset Value	14.10%
C000005446 \| Microsoft
Holdings [Line Items]
Percent of Net Asset Value	13.90%
C000005446 \| Apple
Holdings [Line Items]
Percent of Net Asset Value	7.80%
C000005446 \| Amazon.com
Holdings [Line Items]
Percent of Net Asset Value	7.10%
C000005446 \| Meta Platforms
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000005446 \| Alphabet
Holdings [Line Items]
Percent of Net Asset Value	4.50%
C000005446 \| Carvana
Holdings [Line Items]
Percent of Net Asset Value	3.30%
C000005446 \| Visa
Holdings [Line Items]
Percent of Net Asset Value	3.20%
C000005446 \| Broadcom
Holdings [Line Items]
Percent of Net Asset Value	3.10%
C000005446 \| Netflix
Holdings [Line Items]
Percent of Net Asset Value	2.90%
C000005446 \| Information Technology
Holdings [Line Items]
Percent of Net Asset Value	46.70%
C000005446 \| Communication Services
Holdings [Line Items]
Percent of Net Asset Value	15.70%
C000005446 \| Consumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	15.70%
C000005446 \| Financials
Holdings [Line Items]
Percent of Net Asset Value	8.70%
C000005446 \| Health Care
Holdings [Line Items]
Percent of Net Asset Value	6.70%
C000005446 \| Industrials & Business Services
Holdings [Line Items]
Percent of Net Asset Value	3.50%
C000005446 \| Utilities
Holdings [Line Items]
Percent of Net Asset Value	0.90%
C000005446 \| Consumer Staples
Holdings [Line Items]
Percent of Net Asset Value	0.80%
C000005446 \| Materials
Holdings [Line Items]
Percent of Net Asset Value	0.70%
C000005446 \| Other Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	0.60%