v3.26.1
Schedule H, Line 4i – Schedule of Assets (Held At End of Year) (Details) - EBP 002
12 Months Ended
Dec. 31, 2025
USD ($)
EBP, Schedule of Asset Held for Investment [Line Items]  
Entity tax identification number 37-1078406
Plan number 002
Participant loan, current value $ 2,894,127
Total $ 331,043,890
Participant loan, interest rate 6.75%
Minimum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant loan, interest rate 3.25%
Maximum  
EBP, Schedule of Asset Held for Investment [Line Items]  
Participant loan, interest rate 9.50%
Common stock and stock fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS $ 10,114,425
Mutual funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 227,528,576
Managed funds  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 83,054,745
Investment, Identifier [Axis]: Common stock and stock fund | First Busey Corporation | Common stock  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 603,695
Investment, Identifier [Axis]: Common stock and stock fund | First Busey Corporation | Stock fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 9,510,730
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | AQR Emerging Multi-Style II  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 642,884
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | American Century Mid Cap Value Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 676,114
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | American Funds Euro Pacific Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,938,910
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | American Funds The Growth Fund of America  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 3,208,403
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Congress Mid Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 673,064
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | DFA Emerging Markets Small Cap  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 526,528
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | DFA US Targeted Value Portfolio  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 288,980
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Dodge and Cox International Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,936,220
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Dodge and Cox Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 3,208,219
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Stone Ridge High Yield Reinsurance Risk Premium Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 876,613
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Vanguard 500 Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 3,206,361
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Vanguard Emerging Markets Bond Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 681,593
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Vanguard Short Term Corporate Bond Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 389,492
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Vanguard Small Cap Index Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 288,763
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | Virtus KAR International Small-Mid Cap Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 290,650
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Aggressive Managed Fund | William Blair Emerging Markets Small Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 524,910
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | AQR Emerging Multi-Style II  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 499,355
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | American Century Mid Cap Value Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 580,665
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | American Funds Euro Pacific Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,610,131
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | American Funds The Growth Fund of America  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,809,642
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Cash  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,485
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Congress Mid Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 572,518
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | DFA Emerging Markets Small Cap  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 467,182
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | DFA US Targeted Value Portfolio  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 230,315
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Dodge and Cox International Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,605,431
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Dodge and Cox Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,817,681
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | DoubleLine Core Fixed Income Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 11,658,325
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Federated Hermes Ultra Short Bond Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 439,844
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Stone Ridge High Yield Reinsurance Risk Premium Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 880,568
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Vanguard 500 Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,807,539
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Vanguard Emerging Markets Bond Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 733,633
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Vanguard Short Term Corporate Bond Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 439,158
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Vanguard Small Cap Index Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 229,188
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | Virtus KAR International Small-Mid Cap Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 264,130
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Balanced Managed Fund | William Blair Emerging Markets Small Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 469,072
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | AQR Emerging Multi-Style II  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 22,704
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | American Century Mid Cap Value Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 27,830
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | American Funds Euro Pacific Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 70,260
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | American Funds The Growth Fund of America  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 125,403
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Cash  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 173
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Congress Mid Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 27,549
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | DFA Emerging Markets Small Cap  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 22,510
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | DFA U.S. Targeted Value Portfolio  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 8,275
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Dodge and Cox International Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 70,225
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Dodge and Cox Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 126,030
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | DoubleLine Core Fixed Income Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,907,349
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Federated Hermes Ultra Short Bond Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 112,840
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Stone Ridge High Yield Reinsurance Risk Premium Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 56,291
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Vanguard 500 Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 128,590
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Vanguard Emerging Markets Bond Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 28,088
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Vanguard Short Term Corporate Bond Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 42,197
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | Vanguard Small Cap Index Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 8,291
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Conservative Managed Fund | William Blair Emerging Markets Small Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 19,877
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | AQR Emerging Multi-Style II  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 452,968
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | American Century Mid Cap Value Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 488,524
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | American Funds Euro Pacific Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,568,899
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | American Funds The Growth Fund of America  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,561,125
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Cash  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,376
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Congress Mid Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 486,046
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | DFA Emerging Markets Small Cap  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 434,066
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | DFA US Targeted Value Portfolio  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 233,585
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Dodge and Cox International Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,566,723
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Dodge and Cox Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,561,307
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | DoubleLine Core Fixed Income Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 3,911,032
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Stone Ridge High Yield Reinsurance Risk Premium Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 788,161
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Vanguard 500 Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,559,495
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Vanguard Emerging Markets Bond Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 630,379
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Vanguard Short Term Corporate Bond Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 394,103
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Vanguard Small Cap Index Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 233,408
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | Virtus KAR International Small-Mid Cap Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 275,371
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Growth Managed Fund | William Blair Emerging Markets Small Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 432,394
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | AQR Emerging Multi-Style II  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 160,093
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | American Century Mid Cap Value Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 182,412
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | American Funds Euro Pacific Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 551,830
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | American Funds The Growth Fund of America  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 946,327
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Cash  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 73
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Congress Mid Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 179,802
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | DFA Emerging Markets Small Cap  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 158,583
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | DFA US Targeted Value Portfolio  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 72,351
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Dodge and Cox International Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 550,220
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Dodge and Cox Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 948,965
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | DoubleLine Core Fixed Income Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 6,102,076
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Federated Hermes Ultra Short Bond Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 369,875
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Stone Ridge High Yield Reinsurance Risk Premium Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 294,296
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Vanguard 500 Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 945,617
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Vanguard Emerging Markets Bond Fund Admiral Shares  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 245,187
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Vanguard Short Term Corporate Bond Index Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 147,156
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Vanguard Small Cap Index Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 71,823
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | Virtus KAR International Small-Mid Cap Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 110,273
Investment, Identifier [Axis]: Managed Funds | First Busey Corporation | Moderate Managed Fund | William Blair Emerging Markets Small Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 159,776
Investment, Identifier [Axis]: Managed funds | First Busey Corporation | Aggressive  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 19,357,704
Investment, Identifier [Axis]: Managed funds | First Busey Corporation | Balanced  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 29,115,862
Investment, Identifier [Axis]: Managed funds | First Busey Corporation | Conservative  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,804,482
Investment, Identifier [Axis]: Managed funds | First Busey Corporation | Growth  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 19,579,962
Investment, Identifier [Axis]: Managed funds | First Busey Corporation | Moderate  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 12,196,735
Investment, Identifier [Axis]: Money market accounts | Charles Schwab Bank | Schwab Value Advantage Money Fund (Ultra Shares)  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 7,452,017
Investment, Identifier [Axis]: Mutual funds | AQR | Emerging Multi-Style II  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,654,880
Investment, Identifier [Axis]: Mutual funds | American Century | Mid Cap Value Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 658,900
Investment, Identifier [Axis]: Mutual funds | American Funds | EuroPacific Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,819,383
Investment, Identifier [Axis]: Mutual funds | American Funds | The Growth Fund of America  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 26,559,026
Investment, Identifier [Axis]: Mutual funds | American Funds | The Income Fund of America  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 7,071,885
Investment, Identifier [Axis]: Mutual funds | Congress | Mid Cap Growth Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 4,322,445
Investment, Identifier [Axis]: Mutual funds | DFA | US Targeted Value Portfolio  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 4,212,441
Investment, Identifier [Axis]: Mutual funds | Dodge and Cox | Dodge and Cox Stock Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 9,388,031
Investment, Identifier [Axis]: Mutual funds | DoubleLine | Core Fixed Income Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 10,870,826
Investment, Identifier [Axis]: Mutual funds | Federated Hermes | Ultrashort Bond Fund  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,042,178
Investment, Identifier [Axis]: Mutual funds | GMO | Trust International Developed Equity Allocation  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 12,759,906
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2010  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 54,083
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2015  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 16,550
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2020  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 5,178,788
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2025  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 3,781,266
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2030  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 26,684,949
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2035  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 7,912,530
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2040  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 19,944,506
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2045  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 8,300,663
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2050  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 16,071,006
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2055  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 3,552,395
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2060  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 6,642,262
Investment, Identifier [Axis]: Mutual funds | T. Rowe Price | Retirement Fund 2065  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 1,647,215
Investment, Identifier [Axis]: Mutual funds | Vanguard | 500 Index Fund Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 40,087,009
Investment, Identifier [Axis]: Mutual funds | Vanguard | Mid-Cap Index Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS 2,635,733
Investment, Identifier [Axis]: Mutual funds | Vanguard | Small-Cap Index Admiral  
EBP, Schedule of Asset Held for Investment [Line Items]  
TOTAL INVESTMENTS $ 2,659,720