Loan Servicing (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Loan Servicing [Abstract]
Outstanding Balances Of Mortgages Serviced For Others	$ 43.7	$ 52.0

Represents Outstanding Balances Of Mortgages Serviced For Others

No definition available.

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