| Shareholder Report, Holdings (Details) - C000030518 | May 31, 2024 |
| NVIDIA Corporation | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.90% |
| Microsoft Corporation | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.40% |
| Apple, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 6.70% |
| Alphabet, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.50% |
| BlackRock Liquidity Funds Treasury Trust Fund Portfolio Institutional Class | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.30% |
| Amazon.com, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Eli Lilly & Company | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.30% |
| Home Depot, Inc. (The) | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Meta Platforms, Inc. | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| JPMorgan Chase & Company | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.10% |
| Other Industries | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 22.20% |
| Reit | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.20% |
| Retail - Consumer Staples | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.50% |
| Oil & Gas Producers | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Machinery | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 2.90% |
| Retail - Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.20% |
| Institutional Financial Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.50% |
| Banking | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 3.90% |
| E-Commerce Discretionary | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.10% |
| Money Market | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 4.20% |
| Medical Equipment & Devices | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.30% |
| Biotech & Pharma | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 5.60% |
| Internet Media & Services | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.50% |
| Technology Hardware | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 7.80% |
| Semiconductors | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 9.60% |
| Software | |
| Holdings [Line Items] | |
| Percent of Net Asset Value | 12.60% |
| InvestmentType_Common Stocks | |
| Holdings [Line Items] | |
| Percent of Total Investments | 93.70% |
| InvestmentType_Money Market Funds | |
| Holdings [Line Items] | |
| Percent of Total Investments | 4.20% |
| InvestmentType_Reit | |
| Holdings [Line Items] | |
| Percent of Total Investments | 2.10% |
