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SHAREHOLDERS' EQUITY (Details) (USD $)
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3 Months Ended | ||
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Mar. 31, 2015
Category
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Dec. 31, 2014
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Jul. 03, 2013
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| SHAREHOLDERS' EQUITY [Abstract] | |||
| Number of classification of prompt corrective action regulations | 5mcbc_NumberOfCategoriesOfPromptCorrectiveActionRegulations | ||
| Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] | |||
| CET1 capital (to risk weighted assets), required ratio (in hundredths) | 4.50%mcbc_CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssetsRequired | ||
| CET1 capital (to risk weighted assets), required buffer ratio (in hundredths) | 2.50%mcbc_CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssetsConversationBufferRequired | ||
| CET1 capital (to risk weighted assets), minimum required for capital adequacy purposes, required ratio (in hundredths) | 7.00%mcbc_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssetsRequired | ||
| Minimum ratio of Tier 1 capital to risk-weighted assets required (in hundredths) | 8.50%mcbc_MinimumRatioOfTierOneCapitalToRiskWeightedAssets | ||
| Total capital (to risk weighted assets) minimum required for capital adequacy purposes, required ratio (in hundredths) | 10.50%mcbc_CapitalRequiredForCapitalAdequacyToRiskWeightedAssetsRequired | ||
| Tier 1 capital (to average assets), required ratio (in hundredths) | 4.00%mcbc_TierOneLeverageCapitalToAverageAssetsRequired | ||
| Summary of actual capital levels and minimum required levels [Abstract] | |||
| CET1 capital (to risk weighted assets), actual amount | $ 144,341,000mcbc_CommonEquityTierOneRiskBasedCapital | ||
| CET1 capital (to risk weighted assets), actual ratio (in hundredths) | 10.70%mcbc_CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets | ||
| Tier 1 capital (to risk weighted assets), actual amount | 184,341,000us-gaap_TierOneRiskBasedCapital | 174,084,000us-gaap_TierOneRiskBasedCapital | |
| Tier 1 capital (to risk weighted assets), actual ratio (in hundredths) | 13.70%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets | 14.30%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets | |
| Total capital (to risk weighted assets), actual amount | 201,173,000us-gaap_Capital | 189,353,000us-gaap_Capital | |
| Total capital (to risk weighted assets), actual ratio (in hundredths) | 15.00%us-gaap_CapitalToRiskWeightedAssets | 15.60%us-gaap_CapitalToRiskWeightedAssets | |
| Tier 1 capital (to average assets), actual amount | 184,341,000us-gaap_TierOneLeverageCapital | 174,084,000us-gaap_TierOneLeverageCapital | |
| Tier 1 capital (to average assets), actual ratio (in hundredths) | 11.90%us-gaap_TierOneLeverageCapitalToAverageAssets | 11.60%us-gaap_TierOneLeverageCapitalToAverageAssets | |
| CET1 capital (to risk weighted assets), minimum required for capital adequacy purposes, amount | 60,487,000mcbc_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy | ||
| CET1 capital (to risk weighted assets), minimum required for capital adequacy purposes, ratio (in hundredths) | 4.50%mcbc_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets | ||
| Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes, amount | 80,650,000us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy | 48,706,000us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy | |
| Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes, ratio (in hundredths) | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets | 4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets | |
| Total capital (to risk weighted assets), minimum required for capital adequacy purposes, amount | 107,533,000us-gaap_CapitalRequiredForCapitalAdequacy | 97,420,000us-gaap_CapitalRequiredForCapitalAdequacy | |
| Total capital (to risk weighted assets) minimum required for capital adequacy purposes, ratio (in hundredths) | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets | 8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets | |
| Tier 1 capital (to average assets), minimum required for capital adequacy purposes, amount | 61,969,000us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy | 59,998,000us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy | |
| Tier 1 capital (to average assets), minimum required for capital adequacy purposes, ratio (in hundredths) | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets | |
| Trust preferred securities that qualified as Tier one risk based capital | 40,000,000mcbc_TierOneRiskBasedCapitalTrustPreferredSecurities | 40,000,000mcbc_TierOneRiskBasedCapitalTrustPreferredSecurities | |
| Minimum [Member] | |||
| Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] | |||
| Minimum ratio of Tier 1 capital to risk-weighted assets required (in hundredths) |
4.00%mcbc_MinimumRatioOfTierOneCapitalToRiskWeightedAssets / us-gaap_RangeAxis = us-gaap_MinimumMember |
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| Maximum [Member] | |||
| Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] | |||
| Minimum ratio of Tier 1 capital to risk-weighted assets required (in hundredths) |
6.00%mcbc_MinimumRatioOfTierOneCapitalToRiskWeightedAssets / us-gaap_RangeAxis = us-gaap_MaximumMember |
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| Bank [Member] | |||
| Summary of actual capital levels and minimum required levels [Abstract] | |||
| CET1 capital (to risk weighted assets), actual amount |
178,932,000mcbc_CommonEquityTierOneRiskBasedCapital / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| CET1 capital (to risk weighted assets), actual ratio (in hundredths) |
13.30%mcbc_CommonEquityTierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to risk weighted assets), actual amount |
178,932,000us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
170,983,000us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to risk weighted assets), actual ratio (in hundredths) |
13.30%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
14.00%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
|
| Total capital (to risk weighted assets), actual amount |
195,761,000us-gaap_Capital / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
186,276,000us-gaap_Capital / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
|
| Total capital (to risk weighted assets), actual ratio (in hundredths) |
14.60%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
15.30%us-gaap_CapitalToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
|
| Tier 1 capital (to average assets), actual amount |
178,932,000us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
170,983,000us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
|
| Tier 1 capital (to average assets), actual ratio (in hundredths) |
11.60%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
11.40%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| CET1 capital (to risk weighted assets), minimum required for capital adequacy purposes, amount |
60,477,000mcbc_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| CET1 capital (to risk weighted assets), minimum required for capital adequacy purposes, ratio (in hundredths) |
4.50%mcbc_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes, amount |
80,636,000us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
48,788,000us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to risk weighted assets), minimum required for capital adequacy purposes, ratio (in hundredths) |
6.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
4.00%us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Total capital (to risk weighted assets), minimum required for capital adequacy purposes, amount |
107,514,000us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
97,575,000us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
|
| Total capital (to risk weighted assets) minimum required for capital adequacy purposes, ratio (in hundredths) |
8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
8.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
|
| Tier 1 capital (to average assets), minimum required for capital adequacy purposes, amount |
61,885,000us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
59,923,000us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to average assets), minimum required for capital adequacy purposes, ratio (in hundredths) |
4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| CET1 capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations, amount |
87,355,000mcbc_CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations, amount |
107,514,000us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
73,182,000us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
|
| Total capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations, amount |
134,393,000us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
121,969,000us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to average assets) to be well capitalized under prompt corrective action regulations, amount |
$ 77,356,000us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
$ 74,904,000us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| CET1 capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations, ratio (in hundredths) |
6.50%mcbc_CommonEquityTierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations, ratio (in hundredths) |
8.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Total capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations, ratio (in hundredths) |
10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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| Tier 1 capital (to average assets) to be well capitalized under prompt corrective action regulations, ratio (in hundredths) |
5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |
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- Definition
The minimum required Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. No definition available.
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- Definition
Common Equity Tier 1 Risk Based Capital as defined in the regulations. No definition available.
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- Definition
The minimum Common Equity Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. No definition available.
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- Definition
The minimum Common Equity Tier One Capital Ratio (Common Equity Tier 1 Capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. No definition available.
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- Definition
The minimum required Common Equity Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. No definition available.
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- Definition
The Common Equity Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. No definition available.
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- Definition
The Common Equity Tier 1 Capital ratio (Common Equity Tier 1 Capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. No definition available.
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- Definition
The Common Equity Tier 1 Risk Based Capital ratio (Common Equity Tier 1 Capital divided by risk weighted assets) as defined in the regulations. No definition available.
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- Definition
Required minimum ratio of common equity tier 1 capital to risk weighted assets conversation buffer as defined in the regulations. No definition available.
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- Definition
Required minimum ratio of common equity tier 1 capital to risk weighted assets as defined in the regulations. No definition available.
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- Definition
Refers to Minimum ratio of Tier 1 capital to risk-weighted assets under the regulatory framework for prompt corrective action. No definition available.
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- Definition
Number of classifications provided by prompt corrective action regulations. No definition available.
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- Details
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- Definition
Minimum required ratio of Tier 1 Leverage Capital to average assets as defined in the regulations. No definition available.
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- Definition
The amount of trust preferred securities outstanding during the period that qualified as Tier 1 capital. No definition available.
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- Definition
The amount of total capital as defined in the regulations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Total Capital divided by risk weighted assets as defined in the regulations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tier 1 Leverage Capital divided by average assets as defined in the regulations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tier 1 Risk Based Capital as defined in the regulations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Tier 1 capital divided by risk weighted assets as defined by regulations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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