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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) | 3 Months Ended
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Mar. 31, 2021 $ / shares
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY |
Dividends declared | $ 1.125

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- Definition The total amount of dividends and special dividends paid during hte period fo reach share of common stock outstanding. + References No definition available. + Details
Name: | mrbk_CommonStockDividendsPerShareAndSpecialDividendsPerShare
Namespace Prefix: | mrbk_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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