XML 57 R47.htm IDEA: XBRL DOCUMENT v3.23.3

Portfolio Loans- Distribution of portfolio loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	$ 7,856,160		$ 7,725,702
ACL	(91,710)	$ (91,639)	(91,608)	$ (90,722)	$ (88,757)	$ (87,887)
Portfolio loans, net	7,764,450		7,634,094
Total commercial loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	5,824,800		5,766,496
ACL	(62,530)		(68,616)
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	1,943,449		1,974,154
ACL	(22,633)	(24,510)	(23,860)	(23,695)	(23,359)	(23,855)
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	3,353,753		3,261,873
ACL	(34,691)	(33,656)	(38,299)	(37,799)	(37,182)	(38,249)
Real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	527,598		530,469
ACL	(5,206)	(5,071)	(6,457)	(5,971)	(5,669)	(5,102)
Total retail loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	2,031,360		1,959,206
ACL	(29,180)		(22,992)
Retail real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	1,715,445		1,657,082
ACL	(25,333)	(24,675)	(18,193)	(18,620)	(17,984)	(17,589)
Retail other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial loans	315,915		302,124
ACL	$ (3,847)	$ (3,727)	$ (4,799)	$ (4,637)	$ (4,563)	$ (3,092)

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

Amount excluding accrued interest, of allowance for credit loss on 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

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, after 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

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

- Details

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

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=buse_CommercialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=buse_RealEstateConstructionMember
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: