EARNINGS PER SHARE (Schedule of the Computation of Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Earnings Per Share [Abstract]
Net income	$ 39,271	$ 31,347	$ 77,318	$ 64,252
Less: Allocation of income to unvested stockholders	(114)	(51)	(893)	(627)
Net income available for distribution	$ 39,157	$ 31,296	$ 76,425	$ 63,625
Basic weighted average shares outstanding (in shares)	29,920	30,741	30,095	30,727
Add dilutive effect of performance stock units (two-class method) (in shares)	0	19	0	13
Diluted average shares outstanding (in shares)	29,920	30,760	30,095	30,740
Basic net income per share (in dollars per share)	$ 1.31	$ 1.02	$ 2.54	$ 2.07
Diluted net income per share (in dollars per share)	$ 1.31	$ 1.02	$ 2.54	$ 2.07