Liabilities in Excess of Other Assets [Member] Affirm Holdings Inc Class A [Member] Datadog Inc Class A [Member] Quanta Services Inc [Member] Royal Caribbean Cruises Ltd [Member] HEICO Corp [Member] Monolithic Power Systems Inc [Member] Vertiv Holdings Co Class A [Member] Axon Enterprise Inc [Member] Snowflake Inc Class A [Member] Howmet Aerospace Inc [Member] Russell Midcap Growth Index [Member] Russell 1000 Index [Member] C000037625 [Member] Class R C000166016 [Member] Class K C000004040 [Member] Investor C C000004038 [Member] Investor A C000004037 [Member] Service C000004036 [Member] Institutional Healthcare Sector [Member] Financial Services Sector [Member] Energy Sector [Member] Short-Term Investments [Member] Real Estate Sector [Member] C000004057 [Member] C000004059 [Member] C000004061 [Member] C000219259 [Member] Samsung Electronics Co Ltd Registered Shares GDR [Member] Citigroup Inc [Member] Amazon com Inc [Member] Western Digital Corp [Member] Wells Fargo And Co [Member] CVS Health Corp [Member] FedEx Corp [Member] British American Tobacco PLC [Member] Microsoft Corp [Member] Alphabet Inc Class C NVS [Member] Russell 1000 Value Index [Member] Alphabet Inc Class A [Member] Advanced Micro Devices Inc [Member] Apple Inc [Member] Broadcom Inc [Member] NVIDIA Corp [Member] Automobiles Sector [Member] MSCI All Country World Information Technology Index Net [Member] MSCI All Country World Information Technology 10 40 Index Net [Member] MSCI All Country World Index Net [Member] IT Services [Member] Broadline Retail [Member] Electrical Equipment [Member] Communications Equipment [Member] Interactive Media And Services [Member] Electronic Equipment Instruments And Components [Member] Software [Member] Technology Hardware Storage And Peripherals [Member] Semiconductors And Semiconductor Equipment [Member] Lam Research Corp [Member] Taiwan Semiconductor Manufacturing Co Ltd ADR [Member] Samsung Electronics Co Ltd [Member] SK hynix Inc [Member] C000037630 [Member] C000216612 [Member] C000004066 [Member] C000004064 [Member] C000004063 [Member] C000004062 [Member] C000004873 [Member] C000004875 [Member] C000004877 [Member] MSCI World Energy Index Net [Member] ConocoPhillips [Member] Williams Cos Inc The [Member] Valero Energy Corp [Member] Targa Resources Corp [Member] Canadian Natural Resources Ltd [Member] Suncor Energy Inc [Member] Other Assets Less Liabilities [Member] Tesla Inc [Member] Meta Platforms Inc Class A [Member] Russell 1000 Growth Index [Member] C000037656 [Member] C000198239 [Member] C000004887 [Member] C000004885 [Member] C000004883 [Member] C000004912 [Member] C000004913 [Member] C000004914 [Member] C000004916 [Member] C000172900 [Member] C000037661 [Member] Russell 3000 Health Care Index [Member] Pharmaceuticals [Member] Biotechnology [Member] Health Care Equipment And Supplies [Member] Health Care Providers And Services [Member] Life Sciences Tools And Services [Member] Eli Lilly And Co [Member] Johnson And Johnson [Member] UnitedHealth Group Inc [Member] Merck And Co Inc [Member] Gilead Sciences Inc [Member] AbbVie Inc [Member] Amgen Inc [Member] Thermo Fisher Scientific Inc [Member] Vertex Pharmaceuticals Inc [Member] Pfizer Inc [Member] Russell 3000 Index [Member] Shell PLC [Member] MSCI EAFE Index Net [Member] Tokyo Electron Ltd [Member] Nestle SA Registered Shares [Member] Murata Manufacturing Co Ltd [Member] Siemens AG Registered Shares [Member] BHP Group Ltd [Member] HSBC Holdings PLC [Member] Banco Santander SA [Member] ABB Ltd Registered Shares [Member] ASML Holding NV [Member] Other [Member] C000037670 [Member] C000198216 [Member] C000023032 [Member] C000023030 [Member] C000023028 [Member] UNITED STATES UNITED KINGDOM SWITZERLAND SPAIN NETHERLANDS JAPAN ITALY GERMANY FRANCE AUSTRALIA Chemicals Sector [Member] Container and Packaging Sector [Member] C000103252 [Member] C000103250 [Member] C000103251 [Member] C000198241 [Member] Oil Gas And Consumable Fuels [Member] Metals And Mining [Member] Food Products [Member] Machinery [Member] Energy Equipment And Services [Member] Paper And Forest Products [Member] Exxon Mobil Corp [Member] Nutrien Ltd [Member] Chevron Corp [Member] Corteva Inc [Member] Bunge Global SA [Member] Packaging Corp of America [Member] TotalEnergies SE [Member] Deere And Co [Member] Smurfit Westrock PLC [Member] Bloomberg Commodity Index [Member] Avnet Inc [Member] Comfort Systems U S A Inc [Member] Sanmina Corp [Member] Fabrinet [Member] Sterling Infrastructure Inc [Member] Dycom Industries Inc [Member] Advanced Energy Industries Inc [Member] TTM Technologies Inc [Member] Credo Technology Group Holding Ltd [Member] Bloom Energy Corp Class A [Member] Russell 2000 Index [Member] C000166014 [Member] C000124021 [Member] C000124020 [Member] C000124019 [Member] Investment Type [Axis] Net Assets Investment Company Portfolio Turnover No Trading Symbol Flag