XML 60 R48.htm IDEA: XBRL DOCUMENT
v3.20.2

Portfolio loans - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) loan | Jun. 30, 2019 USD ($) loan | Jun. 30, 2020 USD ($) loan | Jun. 30, 2019 USD ($) loan
Distributions of portfolio loans |  |  |  |
Gross interest income that would have been recorded if impaired loans had been current | $ 400 | $ 400 | $ 900 | $ 1,100
TDRs subsequently classified as non-performing and had payment defaults | loan | 0 |  | 0 |
Commercial Real Estate Loans |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans classified as a TDR |  | $ 3,200 |  | $ 3,200
TDRs subsequently classified as non-performing and had payment defaults | loan |  | 1 |  | 1
Retail Real Estate |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans in the process of foreclosure |  |  | $ 1,300 |
Maximum | Commercial Real Estate Loans |  |  |  |
Distributions of portfolio loans |  |  |  |
Limit where loans are processed through an expedited underwriting process |  |  | 1,000 |
Watch | Commercial Loans |  |  |  |
Distributions of portfolio loans |  |  |  |
Limit above which loans are annually reviewed |  |  | 1,000 |
Special Mention |  |  |  |
Distributions of portfolio loans |  |  |  |
Limit above which loans are annually reviewed |  |  | 350 |
In compliance with modified terms | Commercial Loans |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans classified as a TDR |  | $ 600 |  | $ 600
Performing loans classified as TDRs | loan |  | 1 |  | 1
In compliance with modified terms | Retail Real Estate |  |  |  |
Distributions of portfolio loans |  |  |  |
Loans classified as a TDR | $ 200 |  | $ 200 |
Performing loans classified as TDRs | loan | 1 |  | 1 |

X
- Definition Represents the limit of loan above which loans are reviewed annually. + References No definition available. + Details
Name: | buse_LoansAndLeasesReceivableLimitAboveWhichLoansAreAnnuallyReviewed
Namespace Prefix: | buse_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the limit of loan where loans are processed through an expedited underwriting process. + References No definition available. + Details
Name: | buse_LoansAndLeasesReceivableLimitAboveWhichLoansAreProcessedThroughExpeditedUnderwritingProcess
Namespace Prefix: | buse_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents residential real estate loans that are in the process of foreclosure. + References No definition available. + Details
Name: | buse_LoansInProcessOfForeclosure
Namespace Prefix: | buse_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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_AccountsNotesAndLoansReceivableLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18794-111554 + Details
Name: | us-gaap_LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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_RetailRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
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_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_CommercialLoanMember
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_PerformingFinancingReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |