Earnings Per Common Share - Weighted Average Shares (Details) - shares	3 Months Ended
	Oct. 31, 2020	Oct. 31, 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)	42,958,478	42,168,805
Participating securities (in shares)	0	16,857
Total weighted average number of shares and common stock equivalents attributable to both common stock and participating securities (in shares)	42,958,478	42,185,662