FAIR VALUE MEASUREMENTS (Narrative) (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2022 USD ($) loan	Dec. 31, 2021 USD ($) loan
Fair Value Disclosures [Abstract]
Loans with impairment, unpaid principal	$ 700	$ 300
Deferred loan fee and premium, paid by customers	4,200
Specific reserves for TDR loans	$ 0	0
Delinquent non-accrual loans, impairment		$ 0
Number of non-accrual loans, number of delinquent TDRs. \| loan	0	0
Purchased with credit deterioration, allowance for credit loss at acquisition	$ 0

The amount of deferred loan fee and premium paid by customers.

No definition available.

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Period Type:	instant

- Definition

Delinquent Non Accrual Loans, Impairment

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Impaired Financing Receivable Unpaid Principal Balance Before Write Offs

+ References

No definition available.

+ Details

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

- Definition

Specific Reserves For TDR Loans

+ References

No definition available.

+ Details

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Namespace Prefix:	tcfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of allowance for credit loss at acquisition date of investment in debt security measured at amortized cost (held-to-maturity), purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 19
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919265-210447

+ Details

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

- References

No definition available.

+ Details

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- Definition

Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524

+ Details

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