Earnings Per Common Share - Weighted Average Shares (Details) - shares	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
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 (in shares)	42,187,539	41,759,438	42,327,535	41,726,231
Participating securities (in shares)	1,696	25,002	7,247	45,485
Total weighted average number of shares and common stock equivalents attributable to both common stock and participating securities (in shares)	42,189,235	41,784,440	42,334,782	41,771,716