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Earnings Per Share (Details) - shares
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Calculation of basic and diluted earnings per common share    
Weighted average number of common shares used for basic earnings per share 26,811,697 26,588,440
Effect of potential dilutive shares 307,184 0
Weighted average number of common shares and potential dilutive shares used for diluted earnings per share 27,118,881 26,588,440
Anti-dilutive shares outstanding at period-end excluded from the above reconciliation. 3,893,270 4,491,463
Weighted average shares of non-vested restricted stock excluded from basic earnings per share 214,094 240,379