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Earnings Per Share (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Summary of average number of shares used in the computation of basic and diluted earnings per share        
Basic earnings per share 4,884 4,875 4,873 4,873
Diluted earnings per share 6,382 4,893 6,381 4,894