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		9 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023
Earnings Per Share [Abstract]
Net income	$ 32,489	$ 29,572	$ 109,807	$ 93,824
Less: Allocation of income to unvested stockholders	(67)	(456)	(1,033)	(1,098)
Net income available for distribution	$ 32,422	$ 29,116	$ 108,774	$ 92,726
Basic weighted average shares outstanding (in shares)	29,968	30,800	30,052	30,752
Add dilutive effect of performance stock units (two-class method) (in shares)	0	29	0	18
Diluted average shares outstanding (in shares)	29,968	30,829	30,052	30,770
Basic net income per share (in dollars per share)	$ 1.08	$ 0.95	$ 3.62	$ 3.02
Diluted net income per share (in dollars per share)	$ 1.08	$ 0.94	$ 3.62	$ 3.01