3.4.0.3 html 4 10 1 false 3 0 false 2 false false R1.htm 00000003 - Document - Wilshire 2015 ETF Fund Summary {Unlabeled} Sheet http://wvit/role/Wilshire2015EtfFundSummaryUnlabeled Wilshire 2015 ETF Fund Summary 1 false false R2.htm 00000004 - Document - Wilshire 2025 ETF Fund Summary {Unlabeled} Sheet http://wvit/role/Wilshire2025EtfFundSummaryUnlabeled Wilshire 2025 ETF Fund Summary 2 false false R3.htm 00000005 - Document - Wilshire 2035 ETF Fund Summary {Unlabeled} Sheet http://wvit/role/Wilshire2035EtfFundSummaryUnlabeled Wilshire 2035 ETF Fund Summary 3 false false R4.htm 040000 - Disclosure - Risk/Return Detail Data {Elements} Sheet http://xbrl.sec.gov/rr/role/RiskReturnDetailData Risk/Return Detail Data 4 false false All Reports Book All Reports wvit-20160415.xml wvit-20160415.xsd wvit-20160415_def.xml wvit-20160415_lab.xml wvit-20160415_pre.xml true false