XML 139 R115.htm IDEA: XBRL DOCUMENT v3.21.1

Subsequent Events (Details)	Feb. 16, 2021 $ / shares
Subsequent event
Subsequent Event [Line Items]
Common Stock, Special Dividends, Per Share, Declared	$ 1.00

X

- Definition

Special dividends declared during the period for each share of common stock outstanding.

+ References

No definition available.

+ Details

Name:	mrbk_CommonStockSpecialDividendsPerShareDeclared
Namespace Prefix:	mrbk_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: