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Earnings Per Common Share (Details Textual)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 10,500us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 132,750us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 229,550us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount