Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Loans with impairment, unpaid principal	$ 1.4	$ 0.1

Impaired Financing Receivable Unpaid Principal Balance Before Write Offs

No definition available.

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