Earnings Per Common Share (Details 2) - shares	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Reconciliation of weighted average number of shares and common stock equivalents attributable to common stock, to the entity's total weighted average number of shares and common stock equivalents, including participating securities
Denominator for diluted earnings per share - weighted average number of shares and common stock equivalents attributable to common stock	41,322,120	41,070,335
Participating securities (in shares)	344,663	480,261
Total weighted average number of shares and common stock equivalents attributable to both common stock and participating securities	41,666,783	41,550,596