XML 152 R130.htm IDEA: XBRL DOCUMENT
v3.25.0.1

EMPLOYEE BENEFIT PLANS - Schedule of Expenses Related to the Employee Benefit Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
401(k) Plan expenses |  |  |
Total 401(k) Plan expenses | $ 7,856 | $ 6,776 | $ 7,054
Safe harbor match expenses |  |  |
401(k) Plan expenses |  |  |
Total 401(k) Plan expenses | 4,486 | 3,745 | 4,094
Profit-sharing expenses |  |  |
401(k) Plan expenses |  |  |
Total 401(k) Plan expenses | $ 3,370 | $ 3,031 | $ 2,960

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualPostretirementBenefitsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | buse_DefinedContributionPlanTypeAxis=buse_SafeHarborMatchExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | buse_DefinedContributionPlanTypeAxis=buse_ProfitSharingExpenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |