XML 61 R45.htm IDEA: XBRL DOCUMENT
v3.21.1

Allowance for Loan Losses (the Allowance) - Troubled debt restructuring (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Allowance for Loan Losses (the Allowance) |  |
TDRs included in nonperforming loans and leases | $ 239 | $ 244
TDRs in compliance with modified terms | 2,534 | 3,362
Total TDRs | $ 2,773 | $ 3,606

X
- Definition The amount of the outstanding recorded investment in compliance with modification terms of troubled debt restructurings. + References No definition available. + Details
Name: | mrbk_FinancingReceivableModificationsInComplianceWithModificationTerms
Namespace Prefix: | mrbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of the outstanding recorded investment related to financing receivables that have been included in non performing loans and leases receivables modified by troubled debt restructurings. + References No definition available. + Details
Name: | mrbk_FinancingReceivableModificationsIncludedInNonperformingLoansAndLeases
Namespace Prefix: | mrbk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant