Loans (Impaired Financing Receivables) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Unpaid contractual principal balance	$ 45,495	$ 36,362	$ 50,521
Recorded investment with no allowance	41,469	22,816	45,587
Recorded investment with allowance	3,876	13,484	4,122
Total recorded investment	45,345	36,300	49,709
Related allowance	634	1,387	451
Average recorded investment	45,130	36,260	50,021
Interest income recognized	391	310	1,840
Consumer Loans [Member]
Unpaid contractual principal balance		15
Recorded investment with no allowance		15
Total recorded investment		15
Average recorded investment		17
Commercial Loans [Member]
Unpaid contractual principal balance	5,891	6,800	7,587
Recorded investment with no allowance	5,258	2,681	7,030
Recorded investment with allowance	589	4,118	406
Total recorded investment	5,847	6,799	7,436
Related allowance	355	763	155
Average recorded investment	5,866	6,780	7,196
Interest income recognized	62	62	252
Commercial Equipment [Member]
Unpaid contractual principal balance	600	339	605
Recorded investment with no allowance	370	227	373
Recorded investment with allowance	211	80	213
Total recorded investment	581	307	586
Related allowance	120	80	123
Average recorded investment	583	310	623
Interest income recognized	3	3	23
Home Equity and Second Mortgage [Member]
Unpaid contractual principal balance	689	381	708
Recorded investment with no allowance	630	308	649
Recorded investment with allowance		73
Total recorded investment	630	381	649
Related allowance		33
Average recorded investment	639	333	630
Interest income recognized	5	1	19
Construction and Land Development [Member]
Unpaid contractual principal balance	6,296	5,866	6,402
Recorded investment with no allowance	6,296	1,664	6,102
Recorded investment with allowance		4,202
Total recorded investment	6,296	5,866	6,102
Related allowance		81
Average recorded investment	6,022	5,818	6,474
Interest income recognized	25	27	133
Residential Mortgage [Member]
Unpaid contractual principal balance	3,387	3,572	3,407
Recorded investment with no allowance	2,878	2,705	2,526
Recorded investment with allowance	509	867	881
Total recorded investment	3,387	3,572	3,407
Related allowance	75	98	76
Average recorded investment	3,397	3,597	3,426
Interest income recognized	35	37	155
Commercial Real Estate [Member]
Unpaid contractual principal balance	28,632	19,389	31,812
Recorded investment with no allowance	26,037	15,216	28,907
Recorded investment with allowance	2,567	4,144	2,622
Total recorded investment	28,604	19,360	31,529
Related allowance	84	332	97
Average recorded investment	28,623	19,405	31,672
Interest income recognized	$ 261	$ 180	$ 1,258

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5258-111524

+ Details

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

- Definition

Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

+ References

+ Details

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

- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953550-111524

+ Details

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

- Definition

Amount of allowance for credit losses related to recorded investment.

+ References

+ Details

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

- Definition

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

+ References

+ Details

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

- Definition

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

+ References

+ Details

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

- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

+ Details

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

- Details

Name:	us-gaap_FinancialInstrumentAxis=tcfc_CommercialEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=tcfc_ConstructionAndLandDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=tcfc_HomeEquityAndSecondMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ConsumerLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: