Components of Net Deferred Taxes (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Deferred tax assets:
Operating lease liabilities	$ 28,591	$ 29,115
Net operating loss carryforwards	5,432	5,590
Vacation accrual	3,050	2,923
Pension accrual	3,666	3,603
Allowance for bad debts	2,155	1,291
Insurance accrual	1,934	2,020
Inventory capitalization	(580)	631
Other, net	1,319	1,504
Total deferred tax assets	45,567	46,677
Valuation allowance	(4,184)	(3,976)
Net deferred tax assets	41,383	42,701
Deferred tax liabilities:
Operating lease right-of-use assets	27,097	27,774
Property and equipment	15,012	14,374
Intangibles	19,936	19,591
Fair value of derivative instruments	1,851	6,864
Other, net	3,107	3,112
Total deferred tax liabilities	67,003	71,715
Net deferred taxes	$ (25,620)	$ (29,014)