$MRBK
Meridian Corp Stock $mrbk

$mrbk Overview Financials Valuation SEC Filings Company Website

2021 Form 10-K Financial Statement

#000155837022003752 Filed on March 16, 2022

Income Statement

Concept	2021	2020 Q4	2020
Revenue	$71.52M		$62.66M
YoY Change	14.15%		18.53%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$1.300M		$1.600M
YoY Change	-18.75%		-5.88%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense	$8.411M		$13.66M
YoY Change	-38.43%		-17.35%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$46.30M	$11.88M	$34.54M
YoY Change	34.07%	189.76%	155.56%
Income Tax	$10.72M	$2.880M	$8.098M
% Of Pretax Income	23.15%	24.24%	23.45%
Net Earnings	$35.59M	$9.000M	$26.44M
YoY Change	34.6%	186.62%	152.25%
Net Earnings / Revenue	49.75%		42.2%
Basic Earnings Per Share	$5.91		$4.32
Diluted Earnings Per Share	$5.73	$1.459M	$4.27
COMMON SHARES
Basic Shares Outstanding	6.019M	6.132M	6.122M
Diluted Shares Outstanding	6.206M		6.187M

Balance Sheet

Concept	2021	2020 Q4	2020
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents		$36.74M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$11.80M	$7.777M	$7.800M
YoY Change	51.28%	-9.95%	-9.3%
Goodwill		$899.0K
YoY Change		0.0%
Intangibles		$3.601M
YoY Change		-7.05%
Long-Term Investments	$2.400M	$1.000M	$1.000M
YoY Change	140.0%	0.0%	0.0%
Other Assets	$1.400M	$100.0K	$100.0K
YoY Change	1300.0%	-95.24%	-95.24%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.713B	$1.720B	$1.720B
YoY Change	-0.4%	49.58%	49.58%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$0.00	$1.200M	$1.200M
YoY Change	-100.0%	9.09%	9.09%
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$41.30M	$106.9M	$106.9M
YoY Change	-61.37%	-13.6%	-13.58%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$41.30M	$1.200M	$1.200M
YoY Change	3341.67%	9.09%	9.09%
LONG-TERM LIABILITIES
Long-Term Debt	$40.50M	$40.70M	$40.70M
YoY Change	-0.49%	-0.73%	-0.73%
Other Long-Term Liabilities	$19.80M	$23.00M	$23.00M
YoY Change	-13.91%	147.31%	147.31%
Total Long-Term Liabilities	$60.30M	$63.70M	$63.70M
YoY Change	-5.34%	26.64%	26.64%
TOTAL LIABILITIES
Total Short-Term Liabilities	$41.30M	$1.200M	$1.200M
Total Long-Term Liabilities	$60.30M	$63.70M	$63.70M
Total Liabilities	$1.548B	$1.579B	$1.579B
YoY Change	-1.93%	53.36%	53.37%
SHAREHOLDERS EQUITY
Retained Earnings		$59.01M
YoY Change		73.07%
Common Stock		$6.456M
YoY Change		0.75%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$5.828M
YoY Change		194166.67%
Treasury Stock Shares
Shareholders Equity	$165.4M	$141.6M	$141.6M
YoY Change
Total Liabilities & Shareholders Equity	$1.713B	$1.720B	$1.720B
YoY Change	-0.4%	49.58%	49.58%

Cashflow Statement

Concept	2021	2020 Q4	2020
OPERATING ACTIVITIES
Net Income	$35.59M	$9.000M	$26.44M
YoY Change	34.6%	186.62%	152.25%
Depreciation, Depletion And Amortization	$1.300M		$1.600M
YoY Change	-18.75%		-5.88%
Cash From Operating Activities	$165.1M	$3.500M	-$158.5M
YoY Change	-204.2%	-79.65%	-834.69%
INVESTING ACTIVITIES
Capital Expenditures	$5.374M	$0.00	$747.0K
YoY Change	619.41%	-100.0%	0.13%
Acquisitions
YoY Change
Other Investing Activities	-$135.1M	$8.000M	-$370.3M
YoY Change	-63.52%	-121.16%	160.22%
Cash From Investing Activities	-$140.5M	$8.000M	-$370.7M
YoY Change	-62.09%	-121.11%	159.09%
FINANCING ACTIVITIES
Cash Dividend Paid	$9.679M		$1.525M
YoY Change	534.69%
Common Stock Issuance & Retirement, Net	$3.032M		$5.703M
YoY Change	-46.83%		190000.0%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-37.87M	-50.60M	526.5M
YoY Change	-107.19%	-358.16%	284.54%
NET CHANGE
Cash From Operating Activities	165.1M	3.500M	-158.5M
Cash From Investing Activities	-140.5M	8.000M	-370.7M
Cash From Financing Activities	-37.87M	-50.60M	526.5M
Net Change In Cash	-13.26M	-39.10M	-2.627M
YoY Change	404.91%	3454.55%	-117.04%
FREE CASH FLOW
Cash From Operating Activities	$165.1M	$3.500M	-$158.5M
Capital Expenditures	$5.374M	$0.00	$747.0K
Free Cash Flow	$159.7M	$3.500M	-$159.2M
YoY Change	-200.34%	-79.77%	-864.6%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Entity Registrant Name EntityRegistrantName	Meridian Corp
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001750735
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Entity File Number EntityFileNumber	000-55983
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	PA
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	83-1561918
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	9 Old Lincoln Highway
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Malvern
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	PA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	19355
CY2021	dei	City Area Code CityAreaCode	484
CY2021	dei	Local Phone Number LocalPhoneNumber	568-5000
CY2021	dei	Security12b Title Security12bTitle	Common Stock, par value $1 per share
CY2021	dei	Trading Symbol TradingSymbol	MRBK
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	true
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	true
CY2021	dei	Entity Ex Transition Period EntityExTransitionPeriod	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	143633306
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	6129216
CY2021	dei	Auditor Firm AuditorFirmId	173
CY2021	dei	Auditor Name AuditorName	Crowe LLP
CY2021	dei	Auditor Location AuditorLocation	Washington, D.C.
CY2021Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	23480000
CY2020Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	34190000
CY2020Q4	us-gaap	Federal Funds Sold FederalFundsSold	2554000
CY2021Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	23480000
CY2020Q4	us-gaap	Cash Cash Equivalents And Federal Funds Sold CashCashEquivalentsAndFederalFundsSold	36744000
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	158387000
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	120215000
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	159302000
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	123562000
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6591000
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6857000
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6372000
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6510000
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2354000
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	1031000
CY2021Q4	mrbk	Mortgage Loans Held For Sale Amortized Cost MortgageLoansHeldForSaleAmortizedCost	80002000
CY2020Q4	mrbk	Mortgage Loans Held For Sale Amortized Cost MortgageLoansHeldForSaleAmortizedCost	225007000
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	80882000
CY2020Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	229199000
CY2021Q4	mrbk	Mortgages Held For Investment Fair Value Disclosure MortgagesHeldForInvestmentFairValueDisclosure	17558000
CY2020Q4	mrbk	Mortgages Held For Investment Fair Value Disclosure MortgagesHeldForInvestmentFairValueDisclosure	12182000
CY2020Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	5617000
CY2021Q4	us-gaap	Goodwill Goodwill	899000
CY2021Q4	mrbk	Loans Receivable Amortized Cost LoansReceivableAmortizedCost	17106000
CY2020Q4	mrbk	Loans Receivable Amortized Cost LoansReceivableAmortizedCost	11514000
CY2021Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1386457000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	1284764000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18758000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	17767000
CY2021Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1367699000
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	1266997000
CY2021Q4	us-gaap	Restricted Investments RestrictedInvestments	5117000
CY2020Q4	us-gaap	Restricted Investments RestrictedInvestments	7861000
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11806000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	7777000
CY2021Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	22503000
CY2020Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	12138000
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	5009000
CY2020Q4	us-gaap	Interest Receivable InterestReceivable	5482000
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	1413000
CY2020Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	62000
CY2021Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	12765000
CY2020Q4	us-gaap	Goodwill Goodwill	899000
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3379000
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3601000
CY2021Q4	us-gaap	Other Assets OtherAssets	10463000
CY2020Q4	us-gaap	Other Assets OtherAssets	12717000
CY2021Q4	us-gaap	Assets Assets	1713443000
CY2020Q4	us-gaap	Assets Assets	1720197000
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	274528000
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	203843000
CY2021Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	1171885000
CY2020Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	1037492000
CY2021Q4	us-gaap	Deposits Deposits	1446413000
CY2020Q4	us-gaap	Deposits Deposits	1241335000
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	41344000
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	106862000
CY2020Q4	us-gaap	Notes Payable NotesPayable	165546000
CY2021Q4	us-gaap	Subordinated Debt SubordinatedDebt	40508000
CY2020Q4	us-gaap	Subordinated Debt SubordinatedDebt	40671000
CY2021Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	31000
CY2020Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1154000
CY2021Q4	us-gaap	Other Liabilities OtherLiabilities	19787000
CY2020Q4	us-gaap	Other Liabilities OtherLiabilities	23007000
CY2021Q4	us-gaap	Liabilities Liabilities	1548083000
CY2020Q4	us-gaap	Liabilities Liabilities	1578575000
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	25000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	10000000
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	6534587
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1713443000
CY2020	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	4975000
CY2021	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	-3311000
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	6455566
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	6535000
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	6456000
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	83663000
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	81196000
CY2021Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	426693
CY2020Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	320000
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	8860000
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	5828000
CY2021Q4	us-gaap	Unearned Esop Shares UnearnedESOPShares	1602000
CY2020Q4	us-gaap	Unearned Esop Shares UnearnedESOPShares	1768000
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	84916000
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	59010000
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	708000
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2556000
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	165360000
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	141622000
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1720197000
CY2021	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	68822000
CY2020	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	60357000
CY2021	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1460000
CY2020	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1186000
CY2021	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1192000
CY2020	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1044000
CY2021	mrbk	Interest Income Cash And Cash Equivalents InterestIncomeCashAndCashEquivalents	48000
CY2020	mrbk	Interest Income Cash And Cash Equivalents InterestIncomeCashAndCashEquivalents	69000
CY2021	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	71522000
CY2020	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	62656000
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	5494000
CY2020	us-gaap	Interest Expense Deposits InterestExpenseDeposits	9970000
CY2021	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	2917000
CY2020	us-gaap	Interest Expense Borrowings InterestExpenseBorrowings	3690000
CY2021	us-gaap	Interest Expense InterestExpense	8411000
CY2020	us-gaap	Interest Expense InterestExpense	13660000
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	63111000
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	48996000
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1070000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8302000
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	62041000
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	40694000
CY2021	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	75932000
CY2020	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	76461000
CY2021	mrbk	Sba Income Net Amortization SbaIncomeNetAmortization	6898000
CY2020	mrbk	Sba Income Net Amortization SbaIncomeNetAmortization	2572000
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	365000
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	279000
CY2021	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-4338000
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-584000
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	801000
CY2020	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	3847000
CY2021	mrbk	Increase Decrease In Loans Held For Investments IncreaseDecreaseInLoansHeldForInvestments	-189000
CY2020	mrbk	Increase Decrease In Loans Held For Investments IncreaseDecreaseInLoansHeldForInvestments	323000
CY2021	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	2961000
CY2020	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-9400000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	435000
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1345000
CY2021	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	4305000
CY2020	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	2555000
CY2021	us-gaap	Noninterest Income NoninterestIncome	87988000
CY2020	us-gaap	Noninterest Income NoninterestIncome	86918000
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	78866000
CY2020	us-gaap	Labor And Related Expense LaborAndRelatedExpense	72147000
CY2021	us-gaap	Occupancy Net OccupancyNet	4545000
CY2020	us-gaap	Occupancy Net OccupancyNet	4292000
CY2021	us-gaap	Professional Fees ProfessionalFees	3558000
CY2020	us-gaap	Professional Fees ProfessionalFees	3113000
CY2021	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	3714000
CY2020	us-gaap	Marketing And Advertising Expense MarketingAndAdvertisingExpense	2852000
CY2021	mrbk	Data Processing DataProcessing	2150000
CY2020	mrbk	Data Processing DataProcessing	1913000
CY2021	mrbk	Information Technology InformationTechnology	2232000
CY2020	mrbk	Information Technology InformationTechnology	1542000
CY2021	mrbk	Pennsylvania Bank Shares Tax Expense PennsylvaniaBankSharesTaxExpense	609000
CY2020	mrbk	Pennsylvania Bank Shares Tax Expense PennsylvaniaBankSharesTaxExpense	1049000
CY2021	us-gaap	Other Noninterest Expense OtherNoninterestExpense	8053000
CY2020	us-gaap	Other Noninterest Expense OtherNoninterestExpense	6168000
CY2021	us-gaap	Noninterest Expense NoninterestExpense	103727000
CY2020	us-gaap	Noninterest Expense NoninterestExpense	93076000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	46302000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	34536000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10717000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8098000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	35585000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	26438000
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.91
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.32
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.73
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.27
CY2021	us-gaap	Net Income Loss NetIncomeLoss	35585000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	26438000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-485000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1121000
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1514000
CY2020	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	3584000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-101000
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-320000
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	334000
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	1025000
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1848000
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2559000
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1848000
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2559000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	33737000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	28997000
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	120695000
CY2020	us-gaap	Net Income Loss NetIncomeLoss	26438000
CY2020	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	2559000
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	28997000
CY2020	mrbk	Common Stock Dividends Per Share And Special Dividends Per Share CommonStockDividendsPerShareAndSpecialDividendsPerShare	0.250
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1525000
CY2020	mrbk	Employee Stock Ownership Plan Esop Shares Purchased EmployeeStockOwnershipPlanEsopSharesPurchased	133601
CY2020	mrbk	Stock Purchased During Period Value Employee Stock Purchase Plan StockPurchasedDuringPeriodValueEmployeeStockPurchasePlan	2000000
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	316625
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	5703000
CY2020	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	47881
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	395000
CY2020Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	13328
CY2020	mrbk	Employee Stock Ownership Plan Esop Shares Committed To Be Released Value EmployeeStockOwnershipPlanEsopSharesCommittedToBeReleasedValue	232000
CY2020	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	531000
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	141622000
CY2021	us-gaap	Net Income Loss NetIncomeLoss	35585000
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1848000
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	33737000
CY2021	mrbk	Common Stock Dividends Per Share And Special Dividends Per Share CommonStockDividendsPerShareAndSpecialDividendsPerShare	1.575
CY2021	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9679000
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	106693
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	3032000
CY2021	us-gaap	Stock Issued During Period Shares Share Based Compensation Gross StockIssuedDuringPeriodSharesShareBasedCompensationGross	79021
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	1105000
CY2021Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Committed To Be Released Shares EmployeeStockOwnershipPlanESOPNumberOfCommittedToBeReleasedShares	13328
CY2021	mrbk	Employee Stock Ownership Plan Esop Shares Committed To Be Released Value EmployeeStockOwnershipPlanEsopSharesCommittedToBeReleasedValue	394000
CY2021	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	1213000
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	165360000
CY2021	us-gaap	Profit Loss ProfitLoss	35585000
CY2020	us-gaap	Profit Loss ProfitLoss	26438000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	435000
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1345000
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1369000
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-425000
CY2021	mrbk	Depreciation And Amortization Including Amortization Of Loan Fees DepreciationAndAmortizationIncludingAmortizationOfLoanFees	-5922000
CY2020	mrbk	Depreciation And Amortization Including Amortization Of Loan Fees DepreciationAndAmortizationIncludingAmortizationOfLoanFees	-2890000
CY2021	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	1070000
CY2020	us-gaap	Provision For Other Credit Losses ProvisionForOtherCreditLosses	8302000
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	118000
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	112000
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	1607000
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	763000
CY2021	mrbk	Proceeds From Sales Of Loans ProceedsFromSalesOfLoans	2483373000
CY2020	mrbk	Proceeds From Sales Of Loans ProceedsFromSalesOfLoans	2235986000
CY2021	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	-4338000
CY2020	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	4975000
CY2021	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	-3311000
CY2020	us-gaap	Increase Decrease In Loans Held For Sale IncreaseDecreaseInLoansHeldForSale	3847000
CY2021	mrbk	Increase Decrease In Loans Held For Investment IncreaseDecreaseInLoansHeldForInvestment	-189000
CY2020	mrbk	Increase Decrease In Loans Held For Investment IncreaseDecreaseInLoansHeldForInvestment	323000
CY2020	us-gaap	Gains Losses On Sales Of Investment Real Estate GainsLossesOnSalesOfInvestmentRealEstate	6000
CY2021	mrbk	Amortization Of Mortgage Servicing Rights Msrs And Net Impairment Of Servicing Rights AmortizationOfMortgageServicingRightsMsrsAndNetImpairmentOfServicingRights	1109000
CY2020	mrbk	Amortization Of Mortgage Servicing Rights Msrs And Net Impairment Of Servicing Rights AmortizationOfMortgageServicingRightsMsrsAndNetImpairmentOfServicingRights	816000
CY2021	mrbk	Sba Income SbaIncome	6898000
CY2020	mrbk	Sba Income SbaIncome	2733000
CY2021	mrbk	Payments For Loans Originated For Sale PaymentsForLoansOriginatedForSale	2270693000
CY2020	mrbk	Payments For Loans Originated For Sale PaymentsForLoansOriginatedForSale	2356821000
CY2021	mrbk	Mortgage Banking Income MortgageBankingIncome	75932000
CY2020	mrbk	Mortgage Banking Income MortgageBankingIncome	77116000
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-473000
CY2020	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	2334000
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3693000
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-8995000
CY2021	mrbk	Gain Loss From Investment In Life Insurance GainLossFromInvestmentInLifeInsurance	365000
CY2020	mrbk	Gain Loss From Investment In Life Insurance GainLossFromInvestmentInLifeInsurance	279000
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-768000
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	1254000
CY2021	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-1122000
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	66000
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1591000
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	11047000
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	165123000
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-158465000
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	10447000
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	8247000
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	23585000
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	45927000
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	74341000
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	114494000
CY2020	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	2140000
CY2020	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	126000
CY2021	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	-2743000
CY2020	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	-211000
CY2021	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	87575000
CY2020	us-gaap	Payments To Acquire Loans Held For Investment PaymentsToAcquireLoansHeldForInvestment	312112000
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5374000
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	747000
CY2021	us-gaap	Payments To Acquire Life Insurance Policies PaymentsToAcquireLifeInsurancePolicies	10000000
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-140515000
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-370702000
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	205079000
CY2020	mrbk	Employee Stock Ownership Plan Esop Value Shares Purchased EmployeeStockOwnershipPlanEsopValueSharesPurchased	2000000
CY2020	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	390167000
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5703000
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	9679000
CY2021	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-44939000
CY2020	us-gaap	Proceeds From Repayments Of Short Term Debt Maturing In Three Months Or Less ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess	-922000
CY2021	mrbk	Increase Decrease In Short Term Debt Maturing More Than Three Months IncreaseDecreaseInShortTermDebtMaturingMoreThanThreeMonths	-20579000
CY2020	mrbk	Increase Decrease In Short Term Debt Maturing More Than Three Months IncreaseDecreaseInShortTermDebtMaturingMoreThanThreeMonths	-15479000
CY2021	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	281000
CY2020	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	172000
CY2021	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	-165546000
CY2020	us-gaap	Proceeds From Repayments Of Secured Debt ProceedsFromRepaymentsOfSecuredDebt	162423000
CY2020	us-gaap	Repayments Of Assumed Debt RepaymentsOfAssumedDebt	413000
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	231000
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3032000
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	1525000
CY2021	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	1105000
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	395000
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-37872000
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	526540000
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-13264000
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-2627000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	36744000
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	39371000
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	23480000
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	36744000
CY2021	us-gaap	Interest Paid Net InterestPaidNet	9534000
CY2020	us-gaap	Interest Paid Net InterestPaidNet	13594000
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	14069000
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	5295000
CY2021	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	8410000
CY2020	us-gaap	Transfer Of Loans Held For Sale To Portfolio Loans1 TransferOfLoansHeldForSaleToPortfolioLoans1	3313000
CY2020	mrbk	Noncash Or Partial Noncash Net Loan Assets Purchased NoncashOrPartialNoncashNetLoanAssetsPurchased	325000
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:'Times New Roman','Times','serif';font-size:10pt;font-weight:bold;margin:0pt 0pt 12pt 0pt;"><span style="font-style:italic;"> (c) Significant Concentrations of Credit Risk</span></p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt 0pt 0pt 36pt;">Most of the Corporation’s activities are with customers located in the Delaware Valley tri-state market and the central Maryland market area. Note 4 discusses the types of securities that the Corporation invests in. Note 5 </p><p style="font-family:'Times New Roman','Times','serif';font-size:10pt;text-align:justify;margin:0pt 0pt 12pt 36pt;">discusses types of lending that the Corporation engages in. Although the Corporation has a diversified loan portfolio, its debtors’ ability to honor their contracts is influenced by the region’s economy. The Corporation does not have any significant concentrations to any one industry or customer, however there is significant concentration of commercial real estate-backed loans, amounting to 37% and 38% of total loans held for investment, as of December 31, 2021 and December 31, 2020, respectively.</p>
CY2021Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	2400000
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	1000000
CY2021	mrbk	Loan And Lease Receivable Allowance Cumulative Days Past Due Charge Offs LoanAndLeaseReceivableAllowanceCumulativeDaysPastDueChargeOffs	P120D
CY2021	mrbk	Percentage Of Appraised Value Of Property PercentageOfAppraisedValueOfProperty	0.90
CY2020Q4	us-gaap	Other Real Estate OtherRealEstate	0
CY2021Q4	us-gaap	Other Real Estate OtherRealEstate	0
CY2021	mrbk	Defined Contribution Plan Minimum Age DefinedContributionPlanMinimumAge	P21Y
CY2021	mrbk	Defined Contribution Plan Service Term DefinedContributionPlanServiceTerm	P3M
CY2021	mrbk	Defined Contribution Plan Vesting Period DefinedContributionPlanVestingPeriod	P3Y
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1400000
CY2021	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1100000
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1100000
CY2020	us-gaap	Employee Stock Ownership Plan Esop Compensation Expense EmployeeStockOwnershipPlanESOPCompensationExpense	1200000
CY2021	mrbk	Employee Stock Ownership Plan Esop Employer Contribution EmployeeStockOwnershipPlanEsopEmployerContribution	663000
CY2021	mrbk	Employee Stock Ownership Plan Esop Stock Based Compensation Expense EmployeeStockOwnershipPlanEsopStockBasedCompensationExpense	437000
CY2020	mrbk	Employee Stock Ownership Plan Esop Employer Contribution EmployeeStockOwnershipPlanEsopEmployerContribution	550000
CY2020	mrbk	Employee Stock Ownership Plan Esop One Time Contribution Compensation Expense EmployeeStockOwnershipPlanEsopOneTimeContributionCompensationExpense	600000
CY2021	mrbk	Employee Stock Ownership Plan Esop One Time Contribution Compensation Expense EmployeeStockOwnershipPlanEsopOneTimeContributionCompensationExpense	0
CY2021	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	45606
CY2021	us-gaap	Employee Stock Ownership Plan Esop Weighted Average Purchase Price Of Shares Purchased EmployeeStockOwnershipPlanESOPWeightedAveragePurchasePriceOfSharesPurchased	24.30
CY2020	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	161576
CY2020	us-gaap	Employee Stock Ownership Plan Esop Weighted Average Purchase Price Of Shares Purchased EmployeeStockOwnershipPlanESOPWeightedAveragePurchasePriceOfSharesPurchased	15.06
CY2020Q3	mrbk	Employee Stock Ownership Plan Esop Value Shares Purchase Authorized Amount EmployeeStockOwnershipPlanEsopValueSharesPurchaseAuthorizedAmount	2000000
CY2020Q4	mrbk	Employee Stock Ownership Plan Esop Value Shares Purchase Authorized Amount EmployeeStockOwnershipPlanEsopValueSharesPurchaseAuthorizedAmount	2000000
CY2020	mrbk	Loan Stock Purchased Employee Stock Ownership Plan LoanStockPurchasedEmployeeStockOwnershipPlan	133280
CY2021Q4	mrbk	Employee Stock Ownership Plan Esop Number Of Released Shares EmployeeStockOwnershipPlanEsopNumberOfReleasedShares	26656
CY2021Q4	us-gaap	Employee Stock Ownership Plan Esop Number Of Suspense Shares EmployeeStockOwnershipPlanESOPNumberOfSuspenseShares	106624
CY2020	mrbk	Loan Stock Purchased Employee Stock Ownership Plan LoanStockPurchasedEmployeeStockOwnershipPlan	133280
CY2020	us-gaap	Stock Issued During Period Shares Employee Stock Ownership Plan StockIssuedDuringPeriodSharesEmployeeStockOwnershipPlan	161576
CY2021Q4	us-gaap	Employee Stock Ownership Plan Esop Shares In Esop EmployeeStockOwnershipPlanESOPSharesInESOP	269904
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	35585000
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	26438000
CY2021	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	6133000
CY2020	us-gaap	Weighted Average Number Of Shares Issued Basic WeightedAverageNumberOfSharesIssuedBasic	6159000
CY2021	us-gaap	Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released WeightedAverageNumberOfSharesEmployeeStockOwnershipPlanSharesNotCommittedToBeReleased	114000
CY2020	us-gaap	Weighted Average Number Of Shares Employee Stock Ownership Plan Shares Not Committed To Be Released WeightedAverageNumberOfSharesEmployeeStockOwnershipPlanSharesNotCommittedToBeReleased	37000
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6019000
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6122000
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	130000
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	23000
CY2021	mrbk	Incremental Common Shares Attributable To Dilutive Effect Of Retirement Plan IncrementalCommonSharesAttributableToDilutiveEffectOfRetirementPlan	57000
CY2020	mrbk	Incremental Common Shares Attributable To Dilutive Effect Of Retirement Plan IncrementalCommonSharesAttributableToDilutiveEffectOfRetirementPlan	42000
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6206000
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6187000
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.91
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.32
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.73
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.27
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	139000
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	275000
CY2020Q4	us-gaap	Goodwill Goodwill	899000
CY2021Q4	us-gaap	Goodwill Goodwill	899000
CY2020Q4	us-gaap	Goodwill Goodwill	899000
CY2021Q4	us-gaap	Goodwill Goodwill	899000
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3601000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	222000
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	3379000
CY2020Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	4500000
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	222000
CY2021Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	4278000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1200000
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	1000000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	204000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	204000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	204000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	204000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	204000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	2093000
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	3113000
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	158387000
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2071000
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1156000
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	159302000
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	62000
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6372000
CY2021Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	219000
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6591000
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	120215000
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	3504000
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	157000
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	123562000
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	14
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6510000
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	347000
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6857000
CY2021	mrbk	Debt Securities Other Than Temporary Impairment Number Of Positions DebtSecuritiesOtherThanTemporaryImpairmentNumberOfPositions	0
CY2021Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue	92200000
CY2020Q4	us-gaap	Pledged Assets Separately Reported Securities Pledged As Collateral At Fair Value PledgedAssetsSeparatelyReportedSecuritiesPledgedAsCollateralAtFairValue	55900000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	71969000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1021000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	3676000
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	135000
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	75645000
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	1156000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	10529000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	86000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	7443000
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	71000
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	17972000
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	157000
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	158387000
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	159302000
CY2021Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6372000
CY2021Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6591000
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	120215000
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	123562000
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	6510000
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	6857000
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	23600000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	634000
CY2021	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	199000
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	45900000
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	1500000
CY2020	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	196000
CY2020	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	131000
CY2020	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	83000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8302000
CY2021Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	80882000
CY2020Q4	us-gaap	Loans Receivable Held For Sale Amount LoansReceivableHeldForSaleAmount	229199000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1385688000
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1289756000
CY2021Q4	mrbk	Loans Receivable Gross LoansReceivableGross	1466570000
CY2020Q4	mrbk	Loans Receivable Gross LoansReceivableGross	1518955000
CY2021Q4	us-gaap	Loans Receivable With Fixed Rates Of Interest1 LoansReceivableWithFixedRatesOfInterest1	488220000
CY2020Q4	us-gaap	Loans Receivable With Fixed Rates Of Interest1 LoansReceivableWithFixedRatesOfInterest1	658458000
CY2021Q4	us-gaap	Loans Receivable With Variable Rates Of Interest1 LoansReceivableWithVariableRatesOfInterest1	978350000
CY2020Q4	us-gaap	Loans Receivable With Variable Rates Of Interest1 LoansReceivableWithVariableRatesOfInterest1	860497000
CY2021Q4	mrbk	Loans Receivable Gross LoansReceivableGross	1466570000
CY2020Q4	mrbk	Loans Receivable Gross LoansReceivableGross	1518955000
CY2021Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	-769000
CY2020Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	4992000
CY2021Q4	us-gaap	Capital Leases Net Investment In Sales Type Leases Minimum Payments To Be Received CapitalLeasesNetInvestmentInSalesTypeLeasesMinimumPaymentsToBeReceived	105608000
CY2020Q4	us-gaap	Capital Leases Net Investment In Sales Type Leases Minimum Payments To Be Received CapitalLeasesNetInvestmentInSalesTypeLeasesMinimumPaymentsToBeReceived	37919000
CY2021Q4	us-gaap	Capital Leases Net Investment In Sales Type Leases Deferred Income CapitalLeasesNetInvestmentInSalesTypeLeasesDeferredIncome	17366000
CY2020Q4	us-gaap	Capital Leases Net Investment In Sales Type Leases Deferred Income CapitalLeasesNetInvestmentInSalesTypeLeasesDeferredIncome	6879000
CY2021Q4	us-gaap	Capital Leases Net Investment In Direct Financing And Sales Type Leases CapitalLeasesNetInvestmentInDirectFinancingAndSalesTypeLeases	88242000
CY2020Q4	us-gaap	Capital Leases Net Investment In Direct Financing And Sales Type Leases CapitalLeasesNetInvestmentInDirectFinancingAndSalesTypeLeases	31040000
CY2021Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	1093000
CY2021Q4	mrbk	Financing Receivable Recorded Investment Accrual Status FinancingReceivableRecordedInvestmentAccrualStatus	1362700000
CY2021Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	22988000
CY2021Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1385688000
CY2021Q4	us-gaap	Financing Receivable Percent Past Due1 FinancingReceivablePercentPastDue1	0.0174
CY2020Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	3704000
CY2020Q4	mrbk	Financing Receivable Recorded Investment Accrual Status FinancingReceivableRecordedInvestmentAccrualStatus	1281826000
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	7930000
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	1289756000
CY2020Q4	us-gaap	Financing Receivable Percent Past Due1 FinancingReceivablePercentPastDue1	0.0090
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	17767000
CY2021	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	211000
CY2021	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	132000
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1070000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18758000
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	9513000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	17767000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3276000
CY2021Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	15482000
CY2021Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	18758000
CY2021Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	25829000
CY2021Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1342301000
CY2021Q4	mrbk	Financing Receivable Excluding Loans And Leases Carried At Fair Value FinancingReceivableExcludingLoansAndLeasesCarriedAtFairValue	1368130000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1645000
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	16122000
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	17767000
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10380000
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	1267194000
CY2020Q4	mrbk	Financing Receivable Excluding Loans And Leases Carried At Fair Value FinancingReceivableExcludingLoansAndLeasesCarriedAtFairValue	1277574000
CY2021Q4	mrbk	Financing Receivable Excluding Loans And Leases Carried At Fair Value And Residential Mortgage Consumer And Leases FinancingReceivableExcludingLoansAndLeasesCarriedAtFairValueAndResidentialMortgageConsumerAndLeases	1228852000
CY2020Q4	mrbk	Financing Receivable Excluding Loans And Leases Carried At Fair Value And Residential Mortgage Consumer And Leases FinancingReceivableExcludingLoansAndLeasesCarriedAtFairValueAndResidentialMortgageConsumerAndLeases	1205751000
CY2021Q4	mrbk	Financing Receivable For Residential Mortgage Consumer And Leases FinancingReceivableForResidentialMortgageConsumerAndLeases	139278000
CY2020Q4	mrbk	Financing Receivable For Residential Mortgage Consumer And Leases FinancingReceivableForResidentialMortgageConsumerAndLeases	71823000
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	17813000
CY2021Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	17976000
CY2021Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	3276000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	4644000
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	4696000
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1645000
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	8016000
CY2021Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	8104000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	5736000
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	5862000
CY2021Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	25829000
CY2021Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	26080000
CY2021Q4	mrbk	Impaired Financing Receivable ImpairedFinancingReceivable	3276000
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	10380000
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	10558000
CY2020Q4	mrbk	Impaired Financing Receivable ImpairedFinancingReceivable	1645000
CY2021	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	18236000
CY2021	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	15000
CY2020Q4	mrbk	Financing Receivable Modifications In Compliance With Modification Terms FinancingReceivableModificationsInComplianceWithModificationTerms	3362000
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	4698000
CY2020	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	31000
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	8138000
CY2021	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	154000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	5912000
CY2020	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	297000
CY2021	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	26374000
CY2021	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	169000
CY2020	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	10610000
CY2020	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	328000
CY2021Q4	mrbk	Financing Receivable Modifications Included In Nonperforming Loans And Leases FinancingReceivableModificationsIncludedInNonperformingLoansAndLeases	361000
CY2020Q4	mrbk	Financing Receivable Modifications Included In Nonperforming Loans And Leases FinancingReceivableModificationsIncludedInNonperformingLoansAndLeases	244000
CY2021Q4	mrbk	Financing Receivable Modifications In Compliance With Modification Terms FinancingReceivableModificationsInComplianceWithModificationTerms	3446000
CY2021Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3807000
CY2020Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	3606000
CY2021	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	2
CY2020	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0
CY2020	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0
CY2021	us-gaap	Financing Receivable Modifications Subsequent Default Recorded Investment1 FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1	0
CY2021	mrbk	Loans Receivable Incremental Term Offered LoansReceivableIncrementalTermOffered	P3M
CY2021Q4	mrbk	Loans Receivable Before Deducting Deferred Receivables LoansReceivableBeforeDeductingDeferredReceivables	2400000
CY2021Q4	mrbk	Loans Receivable Reduced Amount LoansReceivableReducedAmount	21800000
CY2021	mrbk	Percentage Of Loans Receivable After Reducing Deferred Receivables PercentageOfLoansReceivableAfterReducingDeferredReceivables	0.90
CY2020Q4	mrbk	Loans Receivable Before Deducting Deferred Receivables LoansReceivableBeforeDeductingDeferredReceivables	24200000
CY2021Q4	mrbk	Loans Receivable Before Deducting Deferred Receivables LoansReceivableBeforeDeductingDeferredReceivables	2424000
CY2020Q4	mrbk	Loans Receivable Before Deducting Deferred Receivables LoansReceivableBeforeDeductingDeferredReceivables	24178000
CY2022Q1	mrbk	Loans Receivable Deferrals Expired LoansReceivableDeferralsExpired	2400000
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	11463000
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	10118000
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11806000
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	7777000
CY2021	us-gaap	Depreciation Depreciation	1300000
CY2020	us-gaap	Depreciation Depreciation	1600000
CY2021Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	3134000
CY2021Q4	mrbk	Interest Bearing Demand Deposit Liabilities InterestBearingDemandDepositLiabilities	268248000
CY2020Q4	mrbk	Interest Bearing Demand Deposit Liabilities InterestBearingDemandDepositLiabilities	206573000
CY2021Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	274528000
CY2020Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	203843000
CY2021Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	45038000
CY2020Q4	us-gaap	Deposits Savings Deposits DepositsSavingsDeposits	8056000
CY2021Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	652590000
CY2020Q4	us-gaap	Deposits Money Market Deposits DepositsMoneyMarketDeposits	564566000
CY2021Q4	us-gaap	Time Deposits TimeDeposits	206009000
CY2020Q4	us-gaap	Time Deposits TimeDeposits	258297000
CY2021Q4	us-gaap	Deposits Deposits	1446413000
CY2020Q4	us-gaap	Deposits Deposits	1241335000
CY2021Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	179800000
CY2020Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	233100000
CY2021Q4	us-gaap	Time Deposit Maturities Year One TimeDepositMaturitiesYearOne	126719000
CY2021Q4	us-gaap	Time Deposit Maturities Year Two TimeDepositMaturitiesYearTwo	18106000
CY2021Q4	us-gaap	Time Deposit Maturities Year Three TimeDepositMaturitiesYearThree	4071000
CY2021Q4	us-gaap	Time Deposit Maturities Year Four TimeDepositMaturitiesYearFour	24271000
CY2021Q4	us-gaap	Time Deposit Maturities Year Five TimeDepositMaturitiesYearFive	32842000
CY2021Q4	us-gaap	Time Deposits TimeDeposits	206009000
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	41344000
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	106862000
CY2021Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1436000
CY2020Q4	us-gaap	Notes Payable NotesPayable	165546000
CY2021	mrbk	Number Of Branch Spaces Leased NumberOfBranchSpacesLeased	22
CY2021	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2200000
CY2020	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1900000
CY2021Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	2179000
CY2021Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1874000
CY2021Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1737000
CY2021Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1456000
CY2021Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	11816000
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	346381
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.13
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	4.55
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	14673
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	13.64
CY2020	mrbk	Share Based Compensation Arrangement By Share Based Payment Award Options Exercised In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue	3.74
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	94650
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	17.70
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	5.07
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	25631
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	17.03
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue	4.73
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	400727
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	16.53
CY2020Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	4.69
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	77265
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	13.68
CY2021	mrbk	Share Based Compensation Arrangement By Share Based Payment Award Options Exercised In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisedInPeriodWeightedAverageGrantDateFairValue	4.35
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	142650
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	27.50
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	9.47
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	4148
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	18.63
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue	6.57
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	461964
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.38
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	6.21
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	291832
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	18.40
CY2021	mrbk	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageGrantDateFairValue	5.27
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	170132
CY2021	mrbk	Share Based Compensation Arrangement By Share Based Payment Award Options Non Vested Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonVestedWeightedAverageExercisePrice	23.77
CY2021	mrbk	Share Based Compensation Arrangements By Share Based Payment Award Options Non Vested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsNonVestedWeightedAverageGrantDateFairValue	7.81
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P7Y7M6D
CY2021	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Lower Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit	11.79
CY2021	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit	31.00
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	7600000
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	5400000
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1000000.0
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	200000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	10022000
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5703000
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-717000
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1242000
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	9305000
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	6945000
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1463000
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1141000
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-51000
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	12000
CY2021	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	1412000
CY2020	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	1153000
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10717000
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8098000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	9733000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	7252000
CY2020	mrbk	Income Tax Reconciliation Deductions Bank Owned Life Insurance Amount IncomeTaxReconciliationDeductionsBankOwnedLifeInsuranceAmount	59000
CY2020	mrbk	Income Tax Reconciliation Deductions Bank Owned Life Insurance Percent IncomeTaxReconciliationDeductionsBankOwnedLifeInsurancePercent	-0.002
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	81000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.002
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	74000
CY2021	mrbk	Income Tax Reconciliation Deductions Bank Owned Life Insurance Amount IncomeTaxReconciliationDeductionsBankOwnedLifeInsuranceAmount	77000
CY2021	mrbk	Income Tax Reconciliation Deductions Bank Owned Life Insurance Percent IncomeTaxReconciliationDeductionsBankOwnedLifeInsurancePercent	-0.002
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1116000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.024
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	911000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.026
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	248000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.005
CY2020	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	153000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	-0.004
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.002
CY2021	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	41000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	0.001
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	71000
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.001
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	73000
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.002
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10717000
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.231
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8098000
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.234
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	4345000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Provision For Loan Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses	4230000
CY2020Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	30000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits	287000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	874000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	528000
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	141000
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Deferred Rent DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent	180000
CY2021Q4	mrbk	Deferred Tax Assets Mortgage Repurchase Reserve DeferredTaxAssetsMortgageRepurchaseReserve	738000
CY2020Q4	mrbk	Deferred Tax Assets Mortgage Repurchase Reserve DeferredTaxAssetsMortgageRepurchaseReserve	641000
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	183000
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	122000
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	6568000
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	5731000
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	535000
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	377000
CY2021Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	2957000
CY2020Q4	us-gaap	Deferred Tax Liabilities Mortgage Servicing Rights DeferredTaxLiabilitiesMortgageServicingRights	1337000
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	15000
CY2021Q4	mrbk	Deferred Tax Liabilities Mortgage Pipeline Fair Value Adjustment DeferredTaxLiabilitiesMortgagePipelineFairValueAdjustment	308000
CY2020Q4	mrbk	Deferred Tax Liabilities Mortgage Pipeline Fair Value Adjustment DeferredTaxLiabilitiesMortgagePipelineFairValueAdjustment	1156000
CY2021Q4	mrbk	Deferred Tax Liabilities Hedge Instrument Fair Value Adjustment DeferredTaxLiabilitiesHedgeInstrumentFairValueAdjustment	190000
CY2020Q4	mrbk	Deferred Tax Liabilities Hedge Instrument Fair Value Adjustment DeferredTaxLiabilitiesHedgeInstrumentFairValueAdjustment	1252000
CY2021Q4	mrbk	Deferred Tax Liabilities Unrealized Gain On Available For Sale Securities DeferredTaxLiabilitiesUnrealizedGainOnAvailableForSaleSecurities	213000
CY2020Q4	mrbk	Deferred Tax Liabilities Unrealized Gain On Available For Sale Securities DeferredTaxLiabilitiesUnrealizedGainOnAvailableForSaleSecurities	797000
CY2021Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	465000
CY2020Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	340000
CY2021Q4	mrbk	Deferred Tax Liabilities Deferred Loan Costs DeferredTaxLiabilitiesDeferredLoanCosts	471000
CY2020Q4	mrbk	Deferred Tax Liabilities Deferred Loan Costs DeferredTaxLiabilitiesDeferredLoanCosts	406000
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1000
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4000
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5155000
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5669000
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	1413000
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	62000
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.231
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.234
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.234
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.231
CY2021	us-gaap	Investment Tax Credit InvestmentTaxCredit	3300000
CY2021	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	161000
CY2021	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	183000
CY2021	mrbk	Low Income Housing Tax Benefits From Losses LowIncomeHousingTaxBenefitsFromLosses	144000
CY2020	us-gaap	Investment Tax Credit InvestmentTaxCredit	1300000
CY2020	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	161000
CY2020	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	180000
CY2020	mrbk	Low Income Housing Tax Benefits From Losses LowIncomeHousingTaxBenefitsFromLosses	26000
CY2021	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	75932000
CY2020	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	76461000
CY2021	mrbk	Sba Income Net Amortization SbaIncomeNetAmortization	6898000
CY2020	mrbk	Sba Income Net Amortization SbaIncomeNetAmortization	2572000
CY2021	mrbk	Gain Loss On Net Change In Fair Values GainLossOnNetChangeInFairValues	-7838000
CY2020	mrbk	Gain Loss On Net Change In Fair Values GainLossOnNetChangeInFairValues	9145000
CY2021	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	2961000
CY2020	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-9400000
CY2021	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	365000
CY2020	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	279000
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	435000
CY2020	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1345000
CY2021	mrbk	Dividends On Federal Home Loan Bank Stock DividendsOnFederalHomeLoanBankStock	191000
CY2020	mrbk	Dividends On Federal Home Loan Bank Stock DividendsOnFederalHomeLoanBankStock	325000
CY2021	mrbk	Noninterest Income Other Operating Income Excluding Dividends On Fhlb Stock NoninterestIncomeOtherOperatingIncomeExcludingDividendsOnFhlbStock	4115000
CY2020	mrbk	Noninterest Income Other Operating Income Excluding Dividends On Fhlb Stock NoninterestIncomeOtherOperatingIncomeExcludingDividendsOnFhlbStock	2230000
CY2021	us-gaap	Noninterest Income NoninterestIncome	87988000
CY2020	us-gaap	Noninterest Income NoninterestIncome	86918000
CY2021	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	2800000
CY2021Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	5100000
CY2020Q4	us-gaap	Loans And Leases Receivable Related Parties LoansAndLeasesReceivableRelatedParties	3300000
CY2021	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	1300000
CY2021	mrbk	Effect Of Changes In Composition Of Related Parties EffectOfChangesInCompositionOfRelatedParties	284000
CY2020	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	4900000
CY2020	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	3800000
CY2020	mrbk	Effect Of Changes In Composition Of Related Parties EffectOfChangesInCompositionOfRelatedParties	1500000
CY2021Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	34700000
CY2020Q4	us-gaap	Due To Related Parties Current And Noncurrent DueToRelatedPartiesCurrentAndNoncurrent	25600000
CY2021Q4	mrbk	Related Party Transaction Subordinated Debt RelatedPartyTransactionSubordinatedDebt	409000
CY2020Q4	mrbk	Related Party Transaction Subordinated Debt RelatedPartyTransactionSubordinatedDebt	485000
CY2021	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	22000
CY2020	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	8000
CY2021	mrbk	Number Of Loan Indemnification Signed NumberOfLoanIndemnificationSigned	1
CY2020Q4	mrbk	Indemnification Or Repurchase Of Loan IndemnificationOrRepurchaseOfLoan	109000
CY2020	mrbk	Number Of Loan Indemnification Signed NumberOfLoanIndemnificationSigned	0
CY2021	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	3200000
CY2020	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	2700000
CY2021	mrbk	Number Of Loan Receivable Sold Repurchased NumberOfLoanReceivableSoldRepurchased	6
CY2021	mrbk	Loan Receivable Sold Repurchased LoanReceivableSoldRepurchased	1300000
CY2020	mrbk	Number Of Loan Receivable Sold Repurchased NumberOfLoanReceivableSoldRepurchased	1
CY2020	mrbk	Loan Receivable Sold Repurchased LoanReceivableSoldRepurchased	153000
CY2021Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	160379000
CY2021Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	9.39
CY2021Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	136621000
CY2021Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	8.00
CY2020Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	134564000
CY2020Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	8.96
CY2020Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized TierOneRiskBasedCapitalRequiredToBeWellCapitalized	120082000
CY2020Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	8.00
CY2021Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	290811000
CY2021Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	821000
CY2020Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	688786000
CY2020Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	5159000
CY2021	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-4338000
CY2020	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	4975000
CY2021	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	3000000.0
CY2020	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-9400000
CY2021	mrbk	Number Of Central Loan Production Facilities NumberOfCentralLoanProductionFacilities	1
CY2021	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	63111000
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	48996000
CY2021	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1070000
CY2020	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	8302000
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	62041000
CY2020	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	40694000
CY2021	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	75932000
CY2020	us-gaap	Fees And Commissions Mortgage Banking And Servicing FeesAndCommissionsMortgageBankingAndServicing	76461000
CY2021	us-gaap	Investment Banking Revenue InvestmentBankingRevenue	4801000
CY2020	us-gaap	Investment Banking Revenue InvestmentBankingRevenue	3854000
CY2021	mrbk	Sba Income Net Amortization SbaIncomeNetAmortization	6898000
CY2020	mrbk	Sba Income Net Amortization SbaIncomeNetAmortization	2572000
CY2021	mrbk	Gain Loss On Net Change In Fair Values GainLossOnNetChangeInFairValues	-7838000
CY2020	mrbk	Gain Loss On Net Change In Fair Values GainLossOnNetChangeInFairValues	9145000
CY2021	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	2961000
CY2020	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-9400000
CY2021	mrbk	Noninterest Income Other Operating Income Miscellaneous NoninterestIncomeOtherOperatingIncomeMiscellaneous	5234000
CY2020	mrbk	Noninterest Income Other Operating Income Miscellaneous NoninterestIncomeOtherOperatingIncomeMiscellaneous	4286000
CY2021	us-gaap	Noninterest Income NoninterestIncome	87988000
CY2020	us-gaap	Noninterest Income NoninterestIncome	86918000
CY2021	us-gaap	Noninterest Expense NoninterestExpense	103727000
CY2020	us-gaap	Noninterest Expense NoninterestExpense	93076000
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	46302000
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	34536000
CY2021Q4	us-gaap	Assets Assets	1713443000
CY2020Q4	us-gaap	Assets Assets	1720197000

Files In Submission

Name	View Source	Status
0001558370-22-003752-index-headers.html	Edgar Link	pending
0001558370-22-003752-index.html	Edgar Link	pending
0001558370-22-003752.txt	Edgar Link	pending
0001558370-22-003752-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
mrbk-20211231.xsd	Edgar Link	pending
mrbk-20211231x10k.htm	Edgar Link	pending
mrbk-20211231x10k002.jpg	Edgar Link	pending
mrbk-20211231x10k_htm.xml	Edgar Link	completed
mrbk-20211231xex21d1.htm	Edgar Link	pending
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mrbk-20211231xex31d1.htm	Edgar Link	pending
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mrbk-20211231xex32.htm	Edgar Link	pending
mrbk-20211231xex4d1.htm	Edgar Link	pending
mrbk-20211231_cal.xml	Edgar Link	unprocessable
mrbk-20211231_def.xml	Edgar Link	unprocessable
mrbk-20211231_lab.xml	Edgar Link	unprocessable
mrbk-20211231_pre.xml	Edgar Link	unprocessable
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report.css	Edgar Link	pending
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$MRBK
Meridian Corp Stock $mrbk

2021 Form 10-K Financial Statement

#000155837022003752 Filed on March 16, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MRBK Meridian Corp Stock $mrbk

2021 Form 10-K Financial Statement

#000155837022003752 Filed on March 16, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MRBK
Meridian Corp Stock $mrbk