Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Aug. 31, 2023	Aug. 31, 2022
Deferred tax assets:
Operating lease liabilities	$ 17,605	$ 17,901
Amortizable goodwill and other intangibles	13,488	9,914
Employee benefit accruals	8,772	12,241
Net operating loss carryforwards	20,280	7,499
Environmental liabilities	10,109	9,742
Other contingencies	5,579	5,199
State credit carryforwards	7,711	7,212
Inventory valuation methods	2,508	2,749
Other	7,193	3,687
Valuation allowances	(17,042)	(15,342)
Total deferred tax assets	76,203	60,802
Deferred tax liabilities:
Accelerated depreciation and other basis differences	61,938	60,539
Operating lease right-of-use assets	17,573	17,353
Investment in operating partnerships	25,769	15,553
Prepaid expense acceleration and other	6,827	6,087
Total deferred tax liabilities	112,107	99,532
Net deferred tax liabilities	$ (35,904)	$ (38,730)