Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Statement of Financial Position [Abstract]
Accounts receivable	$ 363,836	$ 370,726
Accounts and Other Receivables, Net, Current	76,934	65,065
Inventories	95,655	96,333
Costs and estimated earnings in excess of billings	48,620	52,076
Prepaid expenses and other current assets	10,481	15,350
Total current assets	671,296	624,398
Property and equipment, net	63,410	54,426
Goodwill	92,395	92,395
Intangible assets, net	56,208	71,936
Deferred tax assets	20,383	20,519
Operating right of use assets	61,761	55,890
Other non-current assets	16,147	15,145
Total assets	981,600	934,709
Accounts payable and accrued expenses	296,797	316,950
Billings in excess of costs and estimated earnings	103,771	84,936
Total current liabilities	400,568	401,886
Long-term debt	0	81,628
Operating long-term lease liabilities	42,098	38,144
Liability for Uncertainty in Income Taxes, Noncurrent	22,047	9,893
Other non-current liabilities	16,951	12,677
Total liabilities	481,664	544,228
Noncontrolling interest	$ 49,951	$ 29,193
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred stock, value	$ 0	$ 0
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares, Issued	22,049,529	22,049,529
Common Stock, Shares, Outstanding	20,194,218	20,341,900
Common stock, value	$ 220	$ 220
Treasury Stock, Common, Shares	1,855,311	1,707,629
Treasury stock, value	$ (49,450)	$ (44,000)
Additional paid-in capital	203,431	201,871
Retained earnings	295,784	203,197
Total stockholders' equity	449,985	361,288
Total liabilities and stockholders' equity	981,600	934,709
Cash, Cash Equivalents, and Short-Term Investments	$ 75,770	$ 24,848