Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Fair Value Measurements [Abstract]
Loans with impairment, unpaid principal	$ 8.9	$ 4.0

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