Asset-Backed And Mortgage Backed Securities Risk Member Asset-Backed And Mortgage Backed Securities Risk Member Russell 2000 Value Index (reflects no deduction for fees, expenses or taxes) Russell 2000 Value Index (reflects no deduction for fees, expenses or taxes) Bloomberg U.S. Universal Bond Index (reflects no deduction for fees, expenses and taxes) Bloomberg U.S. Universal Bond Index (reflects no deduction for fees, expenses and taxes) Emerging Markets Risk Member Emerging Markets Risk Member Small Company Growth Portfolio - Institutional Class Small Company Growth Portfolio - Institutional Class, C000002810, Class, WSMGX Sector Risk, Health Care Sector Risk Member Sector Risk, Health Care Sector Risk Member Russell 1000® Value Total Return Index (reflects no deduction for fees, expenses or taxes) Russell 1000® Value Total Return Index (reflects no deduction for fees, expenses or taxes) Foreign Securities Risk Member Foreign Securities Risk Member Style Risk Member Style Risk Member Leverage Risk Member Leverage Risk Member Small Company Growth Portfolio Series Small Company Growth Portfolio Series, S000001047, Series Fixed-Income Securities Risk Member Fixed-Income Securities Risk Member Large Company Value Portfolio - Investment Class Large Company Value Portfolio - Investment Class, C000002807, Class, DTLVX Large Company Growth Portfolio - Institutional Class Large Company Growth Portfolio Institutional Class, C000002806, Class Equity Securities Risk Member Equity Securities Risk Member Affiliated Funds And Other Significant Investors Risk Member Affiliated Funds And Other Significant Investors Risk Member Wilshire Income Opportunities Fund - Investment Class Wilshire Income Opportunities Fund - Investment Class, C000167854, Class, WIORX Wilshire 5000 Index (reflects no deduction for fees, expenses or taxes) Wilshire 5000 Index (reflects no deduction for fees, expenses or taxes) Sector Risk, Financials Sector Risk Member Sector Risk, Financials Sector Risk Member Small Company Value Portfolio - Investment Class Small Company Value Portfolio - Investment Class, C000002811, Class, DTSVX Sector Risk Member Sector Risk Member Forward-Foreign Currency Exchange Contracts Risk Member Forward-Foreign Currency Exchange Contracts Risk Member Wilshire Income Opportunities Fund Wilshire Income Opportunities Fund, S000053356, Series Large Company Value Portfolio Series Large Company Value Portfolio Series, S000001046, Series Asset Allocation Risk Member Asset Allocation Risk Member Large-Cap Company Risk Member Large-Cap Company Risk Member Wilshire 5000 IndexSM Fund Wilshire 5000 IndexSM Fund, S000001049, Series Custom Blended Index (reflects no deduction for fees, expenses and taxes) Custom Blended Index (reflects no deduction for fees, expenses and taxes) Other Investment Companies Risk Member Other Investment Companies Risk Member Wilshire 5000 IndexSM Fund - Investment Class Wilshire 5000 IndexSM Fund - Investment Class, C000002815, Class, WFIVX Large Company Growth Portfolio - Investment Class Large Company Growth Portfolio Investment Class, C000002805, Class Wilshire Income Opportunities Fund - Institutional Class Wilshire Income Opportunities Fund - Institutional Class, C000167855, Class, WIOPX Russell 1000® Growth Total Return Index (reflects no deduction for fees, expenses or taxes) Russell 1000® Growth Total Return Index (reflects no deduction for fees, expenses or taxes) Small Company Growth Portfolio - Investment Class Small Company Growth Portfolio - Investment Class, C000002809, Class, DTSGX Small-Cap Risk Member Small-Cap Risk Member Small Company Value Portfolio - Institutional Class Small Company Value Portfolio - Institutional Class, C000002812, Class, WSMVX Wilshire International Equity Fund Wilshire International Equity Fund, S000019534, Series Market Risk Member Market Risk Member Wilshire International Equity Fund - Institutional Class Wilshire International Equity Fund - Institutional Class, C000065457, Class, WLTTX Multi-Managed Fund Risk Member Multi-Managed Fund Risk Member High-Yield Bond Risk Member High-Yield Bond Risk Member Derivatives Risk Member Derivatives Risk Member Wilshire 5000 IndexSM Fund - Institutional Class Wilshire 5000 IndexSM Fund - Institutional Class, C000002816, Class, WINDX Sector Risk, Information Technology Sector Risk Member Sector Risk, Information Technology Sector Risk Member Large Company Growth Portfolio Large Company Growth Portfolio, S000001045, Series Index Tracking Rick Member Index Tracking Rick Member Large Company Value Portfolio - Institutional Class Large Company Value Portfolio - Institutional Class, C000002808, Class, WLCVX Active Management Risk Member Active Management Risk Member Russell 2000® Growth Total Return Index (reflects no deduction for fees, expenses or taxes) Russell 2000® Growth Total Return Index (reflects no deduction for fees, expenses or taxes) Sector Risk, Industrials Sector Risk Member Sector Risk, Industrials Sector Risk Member Small Company Value Portfolio Small Company Value Portfolio, S000001048, Series MSCI All Country World Index ex-US Investable Market Index (reflects no deduction for fees, expenses and taxes) MSCI All Country World Index ex-US Investable Market Index (reflects no deduction for fees, expenses and taxes) Wilshire International Equity Fund - Investment Class Wilshire International Equity Fund - Investment Class, C000065456, Class, WLCTX