Earnings Per Share - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Earnings Per Share [Abstract]          
Weighted average number of shares outstanding 10,941,544 11,005,413 10,957,546 11,016,902  
Number of shares outstanding 10,889,139   10,889,139   10,968,839