Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Statement of Cash Flows [Abstract]
Net income (loss)	$ 78,780	$ 22,094
Bad debt expense	480	2,716
Deferred financing cost amortization	199	136
Depreciation and amortization	20,130	18,740
Gain (Loss) on Disposition of Property Plant Equipment	(14,242)	(70)
Gain (Loss) on Sale of Investments [Abstract]
Non-cash compensation expense	3,256	2,897
Deferred income taxes	9,352	1,815
Accounts receivable	25,390	(60,879)
Inventories	(8,081)	(24,188)
Costs and estimated earnings in excess of billings	7,607	(15,339)
Prepaid expenses and other current assets	(7,990)	(13,412)
Other non-current assets	2,027	(1,974)
Accounts payable and accrued expenses	(44,848)	41,449
Billings in excess of costs and estimated earnings	24,399	8,911
Other non-current liabilities	163	(695)
Net cash provided by operating activities	96,622	(17,799)
Capital expenditures	(11,286)	(26,609)
Proceeds from sale of assets	20,433	175
Cash paid in conjunction with business combinations	(165)	(500)
Net cash used in investing activities	8,982	(26,934)
Borrowings of debt	1,758,982	1,383,745
Repayments of debt	(1,841,641)	(1,327,209)
Cash paid for finance leases	(2,552)	(1,055)
Distribution to noncontrolling interest	(8,484)	(6,352)
Purchase of treasury stock	(8,213)	(10,495)
Options exercised	14	53
Net cash used in financing activities	(101,894)	38,687
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	3,710	(6,046)
CASH, CASH EQUIVALENTS, beginning of period	24,848	23,105
CASH, CASH EQUIVALENTS, end of period	28,558	17,059
Cash paid for interest	1,932	1,917
Cash paid for income taxes (net)	$ 8,257	$ 3,023