Shareholder Report, Holdings (Details)	Dec. 31, 2025
C000005433 \| Howmet Aerospace
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000005433 \| Royal Caribbean Cruises
Holdings [Line Items]
Percent of Net Asset Value	2.50%
C000005433 \| Cencora
Holdings [Line Items]
Percent of Net Asset Value	2.20%
C000005433 \| Hilton Worldwide Holdings
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000005433 \| Cloudflare
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000005433 \| IDEXX Laboratories
Holdings [Line Items]
Percent of Net Asset Value	1.90%
C000005433 \| Carvana
Holdings [Line Items]
Percent of Net Asset Value	1.90%
C000005433 \| Vistra
Holdings [Line Items]
Percent of Net Asset Value	1.90%
C000005433 \| Vertiv Holdings
Holdings [Line Items]
Percent of Net Asset Value	1.90%
C000005433 \| Alnylam Pharmaceuticals
Holdings [Line Items]
Percent of Net Asset Value	1.70%
C000005433 \| Consumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	20.90%
C000005433 \| Industrials & Business Services
Holdings [Line Items]
Percent of Net Asset Value	20.00%
C000005433 \| Information Technology
Holdings [Line Items]
Percent of Net Asset Value	18.70%
C000005433 \| Health Care
Holdings [Line Items]
Percent of Net Asset Value	16.10%
C000005433 \| Financials
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000005433 \| Communication Services
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000005433 \| Utilities
Holdings [Line Items]
Percent of Net Asset Value	2.90%
C000005433 \| Energy
Holdings [Line Items]
Percent of Net Asset Value	2.80%
C000005433 \| Consumer Staples
Holdings [Line Items]
Percent of Net Asset Value	2.20%
C000005433 \| Other Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	2.50%
C000190557 \| Howmet Aerospace
Holdings [Line Items]
Percent of Net Asset Value	3.00%
C000190557 \| Royal Caribbean Cruises
Holdings [Line Items]
Percent of Net Asset Value	2.50%
C000190557 \| Cencora
Holdings [Line Items]
Percent of Net Asset Value	2.20%
C000190557 \| Hilton Worldwide Holdings
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000190557 \| Cloudflare
Holdings [Line Items]
Percent of Net Asset Value	2.00%
C000190557 \| IDEXX Laboratories
Holdings [Line Items]
Percent of Net Asset Value	1.90%
C000190557 \| Carvana
Holdings [Line Items]
Percent of Net Asset Value	1.90%
C000190557 \| Vistra
Holdings [Line Items]
Percent of Net Asset Value	1.90%
C000190557 \| Vertiv Holdings
Holdings [Line Items]
Percent of Net Asset Value	1.90%
C000190557 \| Alnylam Pharmaceuticals
Holdings [Line Items]
Percent of Net Asset Value	1.70%
C000190557 \| Consumer Discretionary
Holdings [Line Items]
Percent of Net Asset Value	20.90%
C000190557 \| Industrials & Business Services
Holdings [Line Items]
Percent of Net Asset Value	20.00%
C000190557 \| Information Technology
Holdings [Line Items]
Percent of Net Asset Value	18.70%
C000190557 \| Health Care
Holdings [Line Items]
Percent of Net Asset Value	16.10%
C000190557 \| Financials
Holdings [Line Items]
Percent of Net Asset Value	9.00%
C000190557 \| Communication Services
Holdings [Line Items]
Percent of Net Asset Value	4.90%
C000190557 \| Utilities
Holdings [Line Items]
Percent of Net Asset Value	2.90%
C000190557 \| Energy
Holdings [Line Items]
Percent of Net Asset Value	2.80%
C000190557 \| Consumer Staples
Holdings [Line Items]
Percent of Net Asset Value	2.20%
C000190557 \| Other Holdings Grouping
Holdings [Line Items]
Percent of Net Asset Value	2.50%