XML 59 R41.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Note 8 - Federal Home Loan Bank of Indianapolis Advances (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Amortizing Advances [Member] |
Notes Tables |
Maturities of Currently Outstanding FHLB Advances [Table Text Block] |
(Dollars in thousands) |  |  |  |
2025 |  | $ | 862 |
2026 |  |  | 900 |
2027 |  |  | 938 |
2028 |  |  | 979 |
2029 |  |  | 1,022 |
Thereafter |  |  | 22,382 |
Bullet Advances [member] |
Notes Tables |
Maturities of Currently Outstanding FHLB Advances [Table Text Block] |
(Dollars in thousands) |  |  |  |
2025 |  | $ | 80,000 |
2026 |  |  | 80,000 |
2027 |  |  | 100,000 |
2028 |  |  | 90,000 |
2029 |  |  | 10,000 |
Thereafter |  |  | 0 |

X
- Definition Tabular disclosure of the maturities of currently outstanding Federal Home Loan Bank advances. + References No definition available. + Details
Name: | mbwm_MaturitiesOfCurrentlyOutstandingFhlbAdvancesTableTextBlock
Namespace Prefix: | mbwm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=mbwm_AmortizingAdvancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=mbwm_BulletAdvancesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |