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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Data Type:	na
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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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for loan losses:
Beginning Balance				$ 9,860				$ 8,540				$ 8,481	$ 9,860	$ 8,540	$ 8,481
Charge-offs													(482)	(1,169)	(1,458)
Recoveries													127	130	84
Provisions	$ 30	$ 224	$ 376	380	$ 670	$ 698	$ 564	427	$ 362	$ 501	$ 392	178	1,010	2,359	1,433
Ending Balance	10,515				9,860				8,540				10,515	9,860	8,540
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				5,212				3,465				3,528	5,212	3,465	3,528
Charge-offs													(217)		(78)
Recoveries													63	58	17
Provisions													1,393	1,689	(2)
Ending Balance	6,451				5,212				3,465				6,451	5,212	3,465
Residential First Mortgages Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				1,406				584				1,047	1,406	584	1,047
Charge-offs															(30)
Recoveries															1
Provisions													(262)	822	(434)
Ending Balance	1,144				1,406				584				1,144	1,406	584
Residential Rentals Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				362				538				593	362	538	593
Charge-offs													(42)	(14)
Provisions													192	(162)	(55)
Ending Balance	512				362				538				512	362	538
Construction And Land Development Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				941				1,103				1,071	941	1,103	1,071
Charge-offs													(26)	(526)
Recoveries														1	32
Provisions													(453)	363
Ending Balance	462				941				1,103				462	941	1,103
Home Equity And Second Mortgages Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				138				142				173	138	142	173
Charge-offs													(14)		(100)
Recoveries													1	5
Provisions													37	(9)	69
Ending Balance	162				138				142				162	138	142
Commercial Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				794				1,477				1,677	794	1,477	1,677
Charge-offs													(13)	(594)	(432)
Recoveries													1	18	11
Provisions													231	(107)	221
Ending Balance	1,013				794				1,477				1,013	794	1,477
Consumer Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				3				2				3	3	2	3
Charge-offs													(2)	(1)
Provisions													6	2	(1)
Ending Balance	7				3				2				7	3	2
Commercial Equipment Portfolio Segment [Member]
Allowance for loan losses:
Beginning Balance				$ 1,004				$ 1,229				$ 389	1,004	1,229	389
Charge-offs													(168)	(34)	(818)
Recoveries													62	48	23
Provisions													(134)	(239)	1,635
Ending Balance	$ 764				$ 1,004				$ 1,229				$ 764	$ 1,004	$ 1,229