Annual Fund Operating Expenses |
Apr. 30, 2026 |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Large Company Growth Portfolio | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | April 30, 2027 | |||||||||||||||
| Large Company Growth Portfolio | Large Company Growth Portfolio - Investment Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.75% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||
| Component1 Other Expenses | 0.13% | |||||||||||||||
| Component2 Other Expenses | 0.19% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.32% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.32% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.02%) | [1] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.30% | |||||||||||||||
| Large Company Growth Portfolio | Large Company Growth Portfolio - Institutional Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.75% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||
| Component1 Other Expenses | 0.06% | |||||||||||||||
| Component2 Other Expenses | 0.19% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.25% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.00% | |||||||||||||||
| Fee Waiver or Reimbursement | 0.00% | [1] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.00% | |||||||||||||||
| Large Company Value Portfolio Series | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | April 30, 2027 | |||||||||||||||
| Large Company Value Portfolio Series | Large Company Value Portfolio - Investment Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.75% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||
| Component1 Other Expenses | 0.07% | |||||||||||||||
| Component2 Other Expenses | 0.23% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.30% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.30% | |||||||||||||||
| Fee Waiver or Reimbursement | 0.00% | [2] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.30% | |||||||||||||||
| Large Company Value Portfolio Series | Large Company Value Portfolio - Institutional Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.75% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||
| Component1 Other Expenses | 0.05% | |||||||||||||||
| Component2 Other Expenses | 0.23% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.28% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.03% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.03%) | [2] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.00% | |||||||||||||||
| Small Company Growth Portfolio Series | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | April 30, 2027 | |||||||||||||||
| Small Company Growth Portfolio Series | Small Company Growth Portfolio - Investment Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.85% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||
| Component1 Other Expenses | 0.07% | |||||||||||||||
| Component2 Other Expenses | 0.79% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.86% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.96% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.61%) | [3] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.35% | |||||||||||||||
| Small Company Growth Portfolio Series | Small Company Growth Portfolio - Institutional Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.85% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||
| Component1 Other Expenses | 0.14% | |||||||||||||||
| Component2 Other Expenses | 0.78% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.92% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.77% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.67%) | [3] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.10% | |||||||||||||||
| Small Company Value Portfolio | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | April 30, 2027 | |||||||||||||||
| Small Company Value Portfolio | Small Company Value Portfolio - Investment Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.85% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||
| Component1 Other Expenses | 0.11% | |||||||||||||||
| Component2 Other Expenses | 0.80% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.91% | |||||||||||||||
| Expenses (as a percentage of Assets) | 2.01% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.66%) | [4] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.35% | |||||||||||||||
| Small Company Value Portfolio | Small Company Value Portfolio - Institutional Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.85% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||
| Component1 Other Expenses | 0.12% | |||||||||||||||
| Component2 Other Expenses | 0.80% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.92% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.77% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.67%) | [4] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.10% | |||||||||||||||
| Wilshire 5000 IndexSM Fund | Wilshire 5000 IndexSM Fund - Investment Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.10% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.20% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.26% | |||||||||||||||
| Acquired Fund Fees and Expenses | 0.00% | |||||||||||||||
| Expenses (as a percentage of Assets) | 0.56% | [5] | ||||||||||||||
| Wilshire 5000 IndexSM Fund | Wilshire 5000 IndexSM Fund - Institutional Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.10% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.24% | |||||||||||||||
| Acquired Fund Fees and Expenses | 0.00% | |||||||||||||||
| Expenses (as a percentage of Assets) | 0.34% | [5] | ||||||||||||||
| Wilshire International Equity Fund | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | April 30, 2027 | |||||||||||||||
| Wilshire International Equity Fund | Wilshire International Equity Fund - Investment Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 1.00% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||
| Component1 Other Expenses | 0.16% | |||||||||||||||
| Component2 Other Expenses | 0.35% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.51% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.76% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.26%) | [6] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.50% | |||||||||||||||
| Wilshire International Equity Fund | Wilshire International Equity Fund - Institutional Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 1.00% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||
| Component1 Other Expenses | 0.05% | |||||||||||||||
| Component2 Other Expenses | 0.36% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.41% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.41% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.16%) | [6] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.25% | |||||||||||||||
| Wilshire Income Opportunities Fund | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Fee Waiver or Reimbursement over Assets, Date of Termination | April 30, 2027 | |||||||||||||||
| Wilshire Income Opportunities Fund | Wilshire Income Opportunities Fund - Investment Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.60% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.25% | |||||||||||||||
| Component1 Other Expenses | 0.13% | |||||||||||||||
| Component2 Other Expenses | 0.40% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.53% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.38% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.23%) | [7] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 1.15% | |||||||||||||||
| Wilshire Income Opportunities Fund | Wilshire Income Opportunities Fund - Institutional Class | ||||||||||||||||
| Prospectus [Line Items] | ||||||||||||||||
| Management Fees (as a percentage of Assets) | 0.60% | |||||||||||||||
| Distribution and Service (12b-1) Fees | 0.00% | |||||||||||||||
| Component1 Other Expenses | 0.05% | |||||||||||||||
| Component2 Other Expenses | 0.40% | |||||||||||||||
| Other Expenses (as a percentage of Assets): | 0.45% | |||||||||||||||
| Expenses (as a percentage of Assets) | 1.05% | |||||||||||||||
| Fee Waiver or Reimbursement | (0.15%) | [7] | ||||||||||||||
| Net Expenses (as a percentage of Assets) | 0.90% | |||||||||||||||
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