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Stock-Based Compensation (Narrative) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based compensation $ 54,000us-gaap_ShareBasedCompensation $ 136,000us-gaap_ShareBasedCompensation  
Sale of stock, price per share (in dollars per share) $ 20.00us-gaap_SaleOfStockPricePerShare   $ 20.07us-gaap_SaleOfStockPricePerShare
Unrecognized stock compensation expense 769,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Option maximum term 10 years    
Aggregate intrinsic value exercisable 0us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1   0us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
Restricted Stock and Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock based compensation $ 54,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= tcfc_RestrictedStockAndUnitsMember
$ 136,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= tcfc_RestrictedStockAndUnitsMember
 
Maximum [Member] | Restricted Stock and Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee benefit plan vesting period 5 years    
Minimum [Member] | Restricted Stock and Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Employee benefit plan vesting period 3 years