XML 53 R42.htm IDEA: XBRL DOCUMENT v3.21.2

Significant Accounting Policies - COVID-19 (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) customer	Dec. 31, 2020 USD ($)
COVID-19
Percentage of remaining loan maintains government guarantee	100.00%
PPP Loans
COVID-19
Customers with PPP loans processed | customer	7,043
PPP loans originated	$ 1,045,775
Customers with PPP loans outstanding | customer	3,104
PPP loans acquired from GSB	$ 43,477
PPP loans outstanding	399,704
PPP loans outstanding, amortized cost	390,395	$ 446,400
Received	685,584
Applications in process	$ 20,891
CARES Act
COVID-19
Customers with PPP loans processed | customer	4,569
PPP loans originated	$ 749,429
Customers with PPP loans outstanding | customer	581
PPP loans acquired from GSB	$ 15,783
PPP loans outstanding	93,455
PPP loans outstanding, amortized cost	93,099
Received	667,796
Applications in process	$ 18,652
Economic Aid Act
COVID-19
Customers with PPP loans processed | customer	2,474
PPP loans originated	$ 296,346
Customers with PPP loans outstanding | customer	2,523
PPP loans acquired from GSB	$ 27,694
PPP loans outstanding	306,249
PPP loans outstanding, amortized cost	297,296
Received	17,788
Applications in process	$ 2,239
GSB | PPP Loans
COVID-19
GSB customers with PPP loans acquired | customer	292
GSB | CARES Act
COVID-19
GSB customers with PPP loans acquired | customer	26
GSB | Economic Aid Act
COVID-19
GSB customers with PPP loans acquired | customer	266

X

- Definition

Represents the amortized cost of the loans outstanding related to the PPP (paycheck protection program).

+ References

No definition available.

+ Details

Name:	buse_FinancingReceivableAmortizedCostCaresAct
Namespace Prefix:	buse_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Represents Paycheck Protection Program loans acquired.

+ References

No definition available.

+ Details

Name:	buse_PaycheckProtectionProgramLoansAcquired
Namespace Prefix:	buse_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the amount of PPP loans acquired.

+ References

No definition available.

+ Details

Name:	buse_PaycheckProtectionProgramLoansAcquiredAmount
Namespace Prefix:	buse_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of Paycheck Protection Program loans balance forgiveness applications in process.

+ References

No definition available.

+ Details

Name:	buse_PaycheckProtectionProgramLoansBalanceForgivenessApplicationsInProcess
Namespace Prefix:	buse_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of Paycheck Protection Program loans balance forgiveness received.

+ References

No definition available.

+ Details

Name:	buse_PaycheckProtectionProgramLoansBalanceForgivenessReceived
Namespace Prefix:	buse_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of Paycheck Protection Program loans originated.

+ References

No definition available.

+ Details

Name:	buse_PaycheckProtectionProgramLoansOriginated
Namespace Prefix:	buse_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Paycheck Protection Program, Number of Customers With Loans Outstanding

+ References

No definition available.

+ Details

Name:	buse_PaycheckProtectionProgramNumberOfCustomersWithLoansOutstanding
Namespace Prefix:	buse_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of customers with Paycheck Protection Program loans processed.

+ References

No definition available.

+ Details

Name:	buse_PaycheckProtectionProgramNumberOfCustomersWithLoansProcessed
Namespace Prefix:	buse_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of remaining balance after loan forgiveness maintains a government guarantee.

+ References

No definition available.

+ Details

Name:	buse_PercentageOfRemainingLoanMaintainsGovernmentGuarantee
Namespace Prefix:	buse_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount, before allowance for credit loss and fee, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-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

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_FinancingReceivableBeforeAllowanceForCreditLossAndFee
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_UnusualOrInfrequentItemLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis=buse_PaycheckProtectionProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis=buse_PaycheckProtectionProgramCaresActMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LoansInsuredOrGuaranteedByGovernmentAuthoritiesAxis=buse_PaycheckProtectionProgramEconomicAidActMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ConsolidatedEntitiesAxis=buse_GlenviewStateBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: