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Short-Term Borrowings and Long-Term Debt (Schedule of Debt) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Long-term debt    
Long-term debt outstanding at end of period $ 74,672us-gaap_LongTermDebt $ 70,476us-gaap_LongTermDebt
Weighted average rate on outstanding long-term debt 2.35%us-gaap_LongtermDebtWeightedAverageInterestRate 2.49%us-gaap_LongtermDebtWeightedAverageInterestRate
Maximum outstanding long-term debt of any month end 75,471tcfc_LongtermDebtMaximumMonthendOutstandingAmount 70,519tcfc_LongtermDebtMaximumMonthendOutstandingAmount
Average outstanding long-term debt 74,714tcfc_LongtermDebtAverageOutstandingAmount 68,996tcfc_LongtermDebtAverageOutstandingAmount
Approximate average rate paid on long-term debt 2.39%tcfc_LongtermDebtApproximateAverageInterestRate 2.53%tcfc_LongtermDebtApproximateAverageInterestRate
Short-term borrowings    
Short-term borrowings outstanding at end of period 2,000us-gaap_ShortTermBorrowings  
Weighted average rate on short-term borrowings 0.31%us-gaap_ShortTermDebtWeightedAverageInterestRate 0.00%us-gaap_ShortTermDebtWeightedAverageInterestRate
Maximum outstanding short-term borrowings at any month end 15,000us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount 24,000us-gaap_ShorttermDebtMaximumMonthendOutstandingAmount
Average outstanding short-term borrowings $ 4,344us-gaap_ShorttermDebtAverageOutstandingAmount $ 4,278us-gaap_ShorttermDebtAverageOutstandingAmount
Approximate average rate paid on short-term borrowings 0.28%tcfc_ShortTermDebtApproximateAverageInterestRate 0.33%tcfc_ShortTermDebtApproximateAverageInterestRate