Financing Receivable, Troubled Debt Restructuring, Modifications, Loan Deferral Amount

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Financing Receivable, Troubled Debt Restructuring, Modifications, Loan Deferral, Original Loan Amount

+ References

No definition available.

+ Details

Name:	tcfc_FinancingReceivableTroubledDebtRestructuringModificationsLoanDeferralOriginalLoanAmount
Namespace Prefix:	tcfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the number of branches.

+ References

No definition available.

+ Details

Name:	tcfc_NumberOfBranches
Namespace Prefix:	tcfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of loan production offices.

+ References

No definition available.

+ Details

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Namespace Prefix:	tcfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of mortgage loan sold.

+ References

No definition available.

+ Details

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Namespace Prefix:	tcfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of operation centers.

+ References

No definition available.

+ Details

Name:	tcfc_NumberOfOperationCenters
Namespace Prefix:	tcfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Occupancy Expense, Depreciation of Premises and Equipment and Other

+ References

No definition available.

+ Details

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Namespace Prefix:	tcfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage status of loan.

+ References

No definition available.

+ Details

Name:	tcfc_PercentageStatusOfLoan
Namespace Prefix:	tcfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, before valuation allowance, of financing receivable classified as held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=120238483&loc=d3e48678-111004

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Data Type:	na
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- Details

Name:	us-gaap_FinancialInstrumentPerformanceStatusAxis=us-gaap_NonperformingFinancingReceivableMember
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Balance Type:
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- Details

Name:	srt_StatementGeographicalAxis=tcfc_MarylandAndVirginiaMember
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Balance Type:
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- Details

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Data Type:	na
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- Details

Name:	srt_StatementGeographicalAxis=tcfc_LeonardtownLaPlataMember
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Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
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Summary of Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) branch operationCenter loanProductionOffice loan	Dec. 31, 2019 USD ($) loan	Apr. 30, 2020
Property, Plant and Equipment [Line Items]
Number of operation centers \| operationCenter	2
Number of LPOs \| loanProductionOffice	4
Trading securities	$ 0	$ 0
Loans held for sale	$ 0	$ 0
Number of mortgage loans sold \| loan	0	0
Occupancy expense, depreciation of premises and equipment and other	$ 1,600,000	$ 1,600,000
U.S. Small Business Administration ("SBA") Paycheck Protection Program ("PPP") loans
Property, Plant and Equipment [Line Items]
Percentage status of loan in portfolio	6.83%	0.00%
Nonperforming Financial Instruments
Property, Plant and Equipment [Line Items]
Percentage status of loan in portfolio	1.23%	1.13%
Nonperforming Financial Instruments \| U.S. Small Business Administration ("SBA") Paycheck Protection Program ("PPP") loans
Property, Plant and Equipment [Line Items]
Loan deferrals	$ 32,000,000.0
Loans deferred, original loan amount	$ 35,400,000
Percentage status of loan in portfolio			2.35%
Maryland and Virginia
Property, Plant and Equipment [Line Items]
Number of branches \| branch	12
Waldrof
Property, Plant and Equipment [Line Items]
Number of branches \| branch	2
Leonardtown, La Plata
Property, Plant and Equipment [Line Items]
Number of branches \| branch	2
Building and Building Improvements \| Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	50 years
Building and Building Improvements \| Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	10 years
Furniture and Fixtures \| Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	15 years
Furniture and Fixtures \| Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Automobiles \| Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Automobiles \| Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	4 years