XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.21.2

Portfolio Loans - Summary of risk grades segregated by category (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Loans |  |
Portfolio loans | $ 7,150,635 | $ 6,814,177
Pass |  |
Loans |  |
Portfolio loans | 6,448,171 | 6,016,748
Watch |  |
Loans |  |
Portfolio loans | 479,566 | 554,970
Special Mention |  |
Loans |  |
Portfolio loans | 145,634 | 150,481
Substandard |  |
Loans |  |
Portfolio loans | 51,895 | 69,048
Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 25,369 | 22,930
Commercial |  |
Loans |  |
Portfolio loans | 1,931,863 | 2,014,576
Commercial | Pass |  |
Loans |  |
Portfolio loans | 1,718,398 | 1,768,755
Commercial | Watch |  |
Loans |  |
Portfolio loans | 115,108 | 136,948
Commercial | Special Mention |  |
Loans |  |
Portfolio loans | 62,094 | 72,447
Commercial | Substandard |  |
Loans |  |
Portfolio loans | 26,033 | 27,903
Commercial | Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 10,230 | 8,523
Commercial real estate |  |
Loans |  |
Portfolio loans | 3,068,622 | 2,892,535
Commercial real estate | Pass |  |
Loans |  |
Portfolio loans | 2,623,243 | 2,393,372
Commercial real estate | Watch |  |
Loans |  |
Portfolio loans | 338,270 | 383,277
Commercial real estate | Special Mention |  |
Loans |  |
Portfolio loans | 81,525 | 75,486
Commercial real estate | Substandard |  |
Loans |  |
Portfolio loans | 18,964 | 34,897
Commercial real estate | Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 6,620 | 5,503
Real estate construction |  |
Loans |  |
Portfolio loans | 430,857 | 461,786
Real estate construction | Pass |  |
Loans |  |
Portfolio loans | 413,986 | 434,681
Real estate construction | Watch |  |
Loans |  |
Portfolio loans | 14,464 | 24,481
Real estate construction | Special Mention |  |
Loans |  |
Portfolio loans | 7 | 77
Real estate construction | Substandard |  |
Loans |  |
Portfolio loans | 2,400 | 2,546
Real estate construction | Substandard Non-accrual |  |
Loans |  |
Portfolio loans |  | 1
Retail Real Estate |  |
Loans |  |
Portfolio loans | 1,512,884 | 1,407,852
Retail Real Estate | Pass |  |
Loans |  |
Portfolio loans | 1,486,172 | 1,382,616
Retail Real Estate | Watch |  |
Loans |  |
Portfolio loans | 11,724 | 10,264
Retail Real Estate | Special Mention |  |
Loans |  |
Portfolio loans | 2,008 | 2,471
Retail Real Estate | Substandard |  |
Loans |  |
Portfolio loans | 4,498 | 3,702
Retail Real Estate | Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 8,482 | 8,799
Retail Other |  |
Loans |  |
Portfolio loans | 206,409 | 37,428
Retail Other | Pass |  |
Loans |  |
Portfolio loans | 206,372 | 37,324
Retail Other | Substandard Non-accrual |  |
Loans |  |
Portfolio loans | 37 | 104
Commercial Loans |  |
Loans |  |
Portfolio loans | 1,931,863 | 2,014,576
Commercial Real Estate Loans |  |
Loans |  |
Portfolio loans | 3,068,622 | 2,892,535
Real Estate Construction |  |
Loans |  |
Portfolio loans | 430,857 | 461,786
Retail Real Estate |  |
Loans |  |
Portfolio loans | 1,512,884 | 1,407,852
Retail Other |  |
Loans |  |
Portfolio loans | $ 206,409 | $ 37,428

X
- Definition Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 + Details
Name: | us-gaap_AccountsReceivableGross
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 No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=buse_WatchListMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
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=us-gaap_ConstructionLoansMember
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: |

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

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=buse_RealEstateConstructionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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