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STOCK-BASED COMPENSATION - Schedule of Changes in the Company's RSU, PSU, and DSU Awards (Details) | 9 Months Ended
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Sep. 30, 2025 $ / shares shares
RSU Awards |
Shares |
Non-vested at beginning of period (in shares) | shares | 1,066,772
Conversion of Busey ROATCE PSUs to RSUs (in shares) | shares | 157,094
Granted (in shares) | shares | 366,487
Dividend equivalents earned (in shares) | shares | 48,060
Vested (in shares) | shares | (451,041)
Forfeited (in shares) | shares | (133,212)
Non-vested at end of period (in shares) | shares | 1,395,208
Weighted- Average Grant Date Fair Value |
Non-vested at beginning of period (in dollars per share) | $ / shares | $ 21.80
Conversion of Busey ROATCE PSUs to RSUs (in dollars per share) | $ / shares | 23.99
Granted (in dollars per share) | $ / shares | 22.22
Dividend equivalents earned (in dollars per share) | $ / shares | 22.30
Vested (in dollars per share) | $ / shares | 20.03
Forfeited (in dollars per share) | $ / shares | 22.38
Non-vested at end of period (in dollars per share) | $ / shares | $ 23.23
RSU Awards | CrossFirst |
Shares |
Replacement of CrossFirst RSUs and PSUs (in shares) | shares | 341,048
Weighted- Average Grant Date Fair Value |
Replacement of CrossFirst RSUs and PSUs (in dollars per share) | $ / shares | $ 23.99
PSU Awards |
Shares |
Non-vested at beginning of period (in shares) | shares | 372,042
Modifications based on CrossFirst acquisition (in shares) | shares | (181,828)
Granted (in shares) | shares | 407,723
Dividend equivalents earned (in shares) | shares | 125
Vested (in shares) | shares | (6,131)
Forfeited (in shares) | shares | (45,878)
Non-vested at end of period (in shares) | shares | 546,053
Weighted- Average Grant Date Fair Value |
Non-vested at beginning of period (in dollars per share) | $ / shares | $ 21.15
Modifications based on CrossFirst acquisition (in dollars per share) | $ / shares | 20.43
Granted (in dollars per share) | $ / shares | 20.99
Dividend equivalents earned (in dollars per share) | $ / shares | 20.83
Vested (in dollars per share) | $ / shares | 20.87
Forfeited (in dollars per share) | $ / shares | 20.95
Non-vested at end of period (in dollars per share) | $ / shares | $ 21.29
DSU Awards |
Shares |
Non-vested at beginning of period (in shares) | shares | 36,893
Granted (in shares) | shares | 39,846
Dividend equivalents earned (in shares) | shares | 6,447
Vested (in shares) | shares | (42,424)
Non-vested at end of period (in shares) | shares | 40,762
Vested and outstanding at end of period (in shares) | shares | 144,461
Weighted- Average Grant Date Fair Value |
Non-vested at beginning of period (in dollars per share) | $ / shares | $ 23.40
Granted (in dollars per share) | $ / shares | 22.16
Dividend equivalents earned (in dollars per share) | $ / shares | 22.73
Vested (in dollars per share) | $ / shares | 23.33
Non-vested at end of period (in dollars per share) | $ / shares | 22.15
Vested and outstanding at end of period (in dollars per share) | $ / shares | $ 23.01

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- Definition The weighted-average fair value of vested and outstanding awards on equity-based plans, excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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