XML 62 R52.htm IDEA: XBRL DOCUMENT
v3.23.2

Portfolio Loans -Summary of portfolio loans that are past due and still accruing or on a non-accrual status (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | $ 7,805,284 | $ 7,725,702
90 days past due and still accruing | 569 | 673
Non-accrual Loans | 15,209 | 15,067
30 to 59 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 3,675 | 5,249
60 to 89 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 1,494 | 1,299
Past due and non-accrual commercial loans |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 5,793,426 | 5,766,496
90 days past due and still accruing | 18 | 0
Non-accrual Loans | 11,229 | 11,818
Past due and non-accrual commercial loans | 30 to 59 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 663 | 126
Past due and non-accrual commercial loans | 60 to 89 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 0 | 0
Commercial |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 1,899,718 | 1,974,154
90 days past due and still accruing | 0 | 0
Non-accrual Loans | 6,163 | 6,174
Commercial | 30 to 59 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 53 | 2
Commercial | 60 to 89 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 0 | 0
Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 3,361,308 | 3,261,873
90 days past due and still accruing | 18 | 0
Non-accrual Loans | 5,066 | 5,644
Commercial real estate | 30 to 59 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 610 | 124
Commercial real estate | 60 to 89 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 0 | 0
Past due and non-accrual retail loans |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 2,011,858 | 1,959,206
90 days past due and still accruing | 551 | 673
Non-accrual Loans | 3,980 | 3,249
Past due and non-accrual retail loans | 30 to 59 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 3,012 | 5,123
Past due and non-accrual retail loans | 60 to 89 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 1,494 | 1,299
Retail real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 1,703,057 | 1,657,082
90 days past due and still accruing | 551 | 673
Non-accrual Loans | 3,910 | 3,096
Retail real estate | 30 to 59 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 2,736 | 4,709
Retail real estate | 60 to 89 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 1,424 | 1,239
Retail other |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 308,801 | 302,124
90 days past due and still accruing | 0 | 0
Non-accrual Loans | 70 | 153
Retail other | 30 to 59 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | 276 | 414
Retail other | 60 to 89 days past due and still accruing |  |
Financing Receivable, Past Due [Line Items] |  |
Commercial loans | $ 70 | $ 60

X
- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-5 + Details
Name: | us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Subparagraph (b) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (2) -Publisher SEC Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-7 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-14 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 80 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-80 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=buse_RetailLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=buse_RetailRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=buse_RetailOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |