XML 115 R102.htm IDEA: XBRL DOCUMENT v3.22.4

Note 12 - Related Parties (Details Textual) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related Party Deposits and Repurchase Agreements	$ 21,500,000	$ 18,400,000
Directors and Executive Officers [Member]
Loan Commitments to Related Parties	116,000,000	104,000,000
Loans and Leases Receivable, Related Parties, Ending Balance	$ 92,660,000	$ 87,672,000	$ 108,042,000

X

- Definition

Represents the amount of loan commitments to related parties of the Company.

+ References

No definition available.

+ Details

Name:	mbwm_LoanCommitmentsToRelatedParties
Namespace Prefix:	mbwm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the balances of related party deposits and repurchase agreements.

+ References

No definition available.

+ Details

Name:	mbwm_RelatedPartyDepositsAndRepurchaseAgreements
Namespace Prefix:	mbwm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(e))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

+ Details

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

X

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mbwm_DirectorsAndExecutiveOfficersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: