Earnings Per Common Share - Schedule of Earnings Per Common Share (Detail) - shares	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Earnings Per Share [Abstract]
Weighted-average common shares outstanding for basic earnings per share (in shares)	55,422,854	55,238,164
Unvested restricted stock units (in shares)	367,858	316,518
Weighted-average common shares outstanding assuming dilution (in shares)	55,790,712	55,554,682