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Earnings Per Common Share - Computation of Basic and Diluted Common Shares (Detail) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Earnings Per Share [Abstract]        
Weighted average basic shares 8,327,009 8,252,396 8,294,268 8,236,212
Dilutive effect of preferred stock, warrants, stock options and restricted stock units       1,041,717
Total weighted average diluted shares 8,327,009 8,252,396 8,294,268 9,277,929