XML 60 R50.htm IDEA: XBRL DOCUMENT v3.22.2.2

Loans and Allowance for Credit Losses - Summary of Purchased Credit Deteriorated (PCD) Loans (Details) - USD ($) $ in Thousands	Feb. 14, 2022	Feb. 22, 2021
Delta Bancshares Company
Summary Of Purchased Credit Deteriorated Loans [Line Items]
Purchase price of purchase credit deteriorated loans at acquisition	$ 18,796
Allowance for credit losses at acquisition	(863)
Non-credit discount/(premium) at acquisition	(523)
Fair value of purchased credit deteriorated loans at acquisition	$ 17,410
LINCO Bancshares, Inc.
Summary Of Purchased Credit Deteriorated Loans [Line Items]
Purchase price of purchase credit deteriorated loans at acquisition		$ 64,647
Allowance for credit losses at acquisition		(2,074)
Non-credit discount/(premium) at acquisition		(187)
Fair value of purchased credit deteriorated loans at acquisition		$ 62,386

X

- Definition

Summary of purchased credit deteriorated loans.

+ References

No definition available.

+ Details

Name:	fmbh_SummaryOfPurchasedCreditDeterioratedLoansLineItems
Namespace Prefix:	fmbh_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 19
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447

+ Details

Name:	us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAllowanceForCreditLossAtAcquisitionDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount at par value of financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 19
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447

+ Details

Name:	us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtParValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount at purchase price of financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 19
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447

+ Details

Name:	us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationAmountAtPurchasePrice
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of discount (premium) attributable to other factors on financing receivable purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 19
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447

+ Details

Name:	us-gaap_FinancingReceivablePurchasedWithCreditDeteriorationDiscountPremium
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=fmbh_DeltaBancsharesCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=fmbh_LINCOBancsharesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: