A valuation allowance for financing receivables that are expected to be uncollectible.

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

- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

+ Details

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

- Details

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- Details

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- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=tcfc_ResidentialRentalsPortfolioSegmentMember
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Data Type:	na
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- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=tcfc_ConstructionAndLandDevelopmentPortfolioSegmentMember
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- Details

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- Details

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- Details

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- Details

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Loans (Allowance for Credit Losses on Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for loan losses:
Beginning Balance				$ 10,515				$ 9,860				$ 8,540	$ 10,515	$ 9,860	$ 8,540
Charge-offs													(1,217)	(482)	(1,169)
Recoveries													273	127	130
Provisions	$ 465	$ 40	$ 400	500	$ 30	$ 224	$ 376	380	$ 670	$ 698	$ 564	427	1,405	1,010	2,359
Ending Balance	10,976				10,515				9,860				10,976	10,515	9,860
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				6,451				5,212				3,465	6,451	5,212	3,465
Charge-offs													(268)	(217)
Recoveries													10	63	58
Provisions													689	1,393	1,689
Ending Balance	6,882				6,451				5,212				6,882	6,451	5,212
Residential First Mortgages Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				1,144				1,406				584	1,144	1,406	584
Charge-offs													(115)
Provisions													(274)	(262)	822
Ending Balance	755				1,144				1,406				755	1,144	1,406
Residential Rentals Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				512				362				538	512	362	538
Charge-offs													(84)	(42)	(14)
Provisions													70	192	(162)
Ending Balance	498				512				362				498	512	362
Construction And Land Development Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				462				941				1,103	462	941	1,103
Charge-offs														(26)	(526)
Recoveries															1
Provisions													(152)	(453)	363
Ending Balance	310				462				941				310	462	941
Home Equity And Second Mortgages Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				162				138				142	162	138	142
Charge-offs													(7)	(14)
Recoveries													18	1	5
Provisions													(40)	37	(9)
Ending Balance	133				162				138				133	162	138
Commercial Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				1,013				794				1,477	1,013	794	1,477
Charge-offs													(94)	(13)	(594)
Recoveries													189	1	18
Provisions													374	231	(107)
Ending Balance	1,482				1,013				794				1,482	1,013	794
Consumer Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				7				3				2	7	3	2
Charge-offs													(2)	(2)	(1)
Provisions													1	6	2
Ending Balance	6				7				3				6	7	3
Commercial Equipment Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				$ 764				$ 1,004				$ 1,229	764	1,004	1,229
Charge-offs													(647)	(168)	(34)
Recoveries													56	62	48
Provisions													737	(134)	(239)
Ending Balance	$ 910				$ 764				$ 1,004				$ 910	$ 764	$ 1,004