Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Sep. 30, 2022
Statement of Financial Position [Abstract]
Cash and cash equivalents	$ 15,129	$ 24,848
Accounts receivable	330,643	370,726
Accounts and Other Receivables, Net, Current	73,965	65,065
Inventories	106,311	96,333
Costs and estimated earnings in excess of billings	47,956	52,076
Prepaid expenses and other current assets	17,930	15,350
Total current assets	591,934	624,398
Property and equipment, net	55,073	54,426
Goodwill	92,395	92,395
Intangible assets, net	63,592	71,936
Deferred tax assets	15,438	20,519
Operating right of use assets	54,206	55,890
Other non-current assets	16,450	15,145
Total assets	889,088	934,709
Accounts payable and accrued expenses	278,138	316,950
Billings in excess of costs and estimated earnings	94,829	84,936
Total current liabilities	372,967	401,886
Long-term debt	14,173	81,628
Operating long-term lease liabilities	36,684	38,144
Other non-current liabilities	30,920	22,570
Total liabilities	454,744	544,228
Noncontrolling interest	36,593	29,193
Preferred stock, value	0	0
Common stock, value	220	220
Treasury stock, value	(49,751)	(44,000)
Additional paid-in capital	201,958	201,871
Retained earnings	245,324	203,197
Total stockholders' equity	397,751	361,288
Total liabilities and stockholders' equity	$ 889,088	$ 934,709