v3.25.4
Shareholder Report
12 Months Ended
Dec. 31, 2025
USD ($)
$ / shares
Shareholder Report [Line Items]  
Document Type N-CSR
Amendment Flag false
Registrant Name Wilshire Variable Insurance Trust
Entity Central Index Key 0001026708
Entity Investment Company Type N-1A
Document Period End Date Dec. 31, 2025
Shareholder Report Annual or Semi-Annual annual shareholder report
Wilshire Global Allocation Fund  
Shareholder Report [Line Items]  
Fund Name Wilshire Global Allocation Fund
Class Name Wilshire Global Allocation Fund
No Trading Symbol true
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Wilshire Global Allocation Fund (the “Fund”) for the period of  January 1, 2025, to December 31, 2025.
Additional Information [Text Block] You can find additional information about the Fund at https://www.wilshire.com/research-insights/product-literature. You can also request this information by contacting us at 1-866-591-1658.
Additional Information Phone Number 1-866-591-1658
Additional Information Website https://www.wilshire.com/research-insights/product-literature
Expenses [Text Block]
WHAT WERE THE FUND COSTS FOR THE PAST YEAR? (based on a hypothetical $10,000 investment)
Fund Name
Costs of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Wilshire Global Allocation Fund
$49
0.45%
Expenses Paid, Amount $ 49
Expense Ratio, Percent 0.45%
Factors Affecting Performance [Text Block]
HOW DID THE FUND PERFORM LAST YEAR AND WHAT AFFECTED ITS PERFORMANCE?
The Global Allocation Fund returned 17.41% in 2025, outperforming the Custom Benchmark return of 15.86%.  The U.S. stock market, represented by the FT Wilshire 5000 IndexSM, was up 17.13% for the past year. Sector performance was positive across all sectors with information technology (+22.81%), industrials (+18.18%) and communication services (+31.77%) leading the market. From a size perspective, FT Wilshire Small Cap IndexSM underperformed FT Wilshire Large Cap IndexSM by 9.78% for the 1-year period. Growth stocks continued to outperform Value stocks during the year. Performance results within international equity markets were positive for the year. Both Non U.S. Developed and emerging market equities outperformed U.S. equities by a significant margin. Active management faced persistant headwind as mega capitalization stocks continued to perform well relative to the rest of the equities market. Credit oriented fixed income investments such as high yield, marginally outperformed the Bloomberg U.S. Aggregate Bond Index for the year.
Top Contributors
Exposure to Wilshire Large Company Growth Portfolio was the top contributor from a manager selection stand point.
Top Detractors
Overweight exposure to fixed income was a detractor of relative returns.
Performance Past Does Not Indicate Future [Text] The Fund’s past performance is not a good predictor of how the Fund will perform in the future.
Line Graph [Table Text Block]
image
Average Annual Return [Table Text Block]
ANNUAL AVERAGE TOTAL RETURN (%)
 
1 Year
5 Year
10 Year
TF (without sales charge)
17.41
6.89
7.62
MSCI ACWI Net Total Return Index    (USD)
22.34
11.19
11.72
Bloomberg Global Aggregate USD Hedged
4.86
0.34
2.39
65/35 MSCI ACWI IMI/Bloomberg Global Agg(Hedged)
15.86
7.14
8.42
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund shares.
Updated Performance Information Location [Text Block]
Visit https://www.wilshire.com/research-insights/product-literature for more recent performance information.
Net Assets $ 508,084,713
Holdings Count | $ / shares 10
Advisory Fees Paid, Amount $ 565,158
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
KEY FUND STATISTICS (as of December 31, 2025)
Net Assets
$508,084,713
Number of Holdings
10
Net Advisory Fee
$565,158
Portfolio Turnover
22%
Holdings [Text Block]
WHAT DID THE FUND INVEST IN? (as of December 31, 2025)
Top Sectors
(% of Net Assets)
Cash & Other
100.0%
Top 10 Issuers
(% of Net Assets)
Wilshire International Equity Fund
22.2%
Wilshire Income Opportunities Fund
18.9%
Wilshire Large Company Growth Portfolio
17.4%
Wilshire Large Company Value Portfolio
16.6%
Vanguard Total International Bond Index Fund
13.9%
Vanguard Mega Cap Index Fund
4.0%
Fidelity Emerging Markets Index Fund
2.0%
Vanguard Long-Term Bond Index Fund
2.0%
Wilshire Small Company Value Portfolio
1.5%
Wilshire Small Company Growth Portfolio
1.5%
Updated Prospectus Web Address https://www.wilshire.com/research-insights/product-literature