Unaudited Consolidated Statements of Changes in Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net income	$ 13,462	$ 11,559
Reconciliation of net income to cash flows provided by operating activities:
Depreciation and amortization	61,156	54,607
Amortization of deferred financing fees (includes $0 and $0 write off of deferred financing fees)	926	1,044
Deferred income taxes	592	476
Share-based compensation	10,589	6,233
(Gain) loss on sale of property, plant, and equipment	(61)	807
(Gain) loss on sale of business	(193)	191
Foreign currency exchange losses (gains) on intercompany loans and other non-cash items	3,728	(3,659)
Changes in assets and liabilities
Accounts receivable	16,554	36,221
Inventories	(26,754)	(14,091)
Contract assets	(26,910)	6,553
Prepaids and other current assets	(14,049)	(9,921)
Accounts payable	19,589	(9,799)
Accrued expenses and other liabilities	(13,648)	(9,089)
Contract liabilities	(382)	9,829
Income taxes	135	(3,948)
Other non‑current assets and liabilities	(15,586)	(13,955)
Net cash provided by operating activities	29,148	63,058
Investing activities
Purchase of property, plant, and equipment	(36,320)	(36,297)
Purchase of intangibles	(1,582)	(539)
Proceeds from sale of property, plant, and equipment	1,940	640
Proceeds from sale of business, net of cash of $0 and $0	356	897
Acquisitions, net of cash received $0 and $0	(194,976)	(8,743)
Net cash used in investing activities	(230,582)	(44,042)
Financing activities
Issuance of debt, net of deferred issuance costs	223,793	13,993
Repayment of debt	(33,362)	(10,036)
Repayment of finance lease obligation	(6,571)	(6,901)
Proceeds from issuance of common stock	5,274	13,430
Taxes paid related to net share settlements of share-based compensation awards	(5,144)	(1,863)
Distribution to non‑controlling interest	(100)	(350)
Net cash provided by financing activities	183,890	8,273
Effect of exchange rate changes on cash	800	2,428
Change in cash and cash equivalents	(16,744)	29,717
Cash and cash equivalents
Beginning of period	146,244	193,001
End of period	129,500	222,718
Supplemental disclosure of cash flow information
Cash paid for taxes	2,889	5,457
Cash paid for interest	12,537	14,647
Non‑cash investing and financing activities
Finance lease transactions	6,199	9,044
Operating lease transactions	$ 11,385	$ 7,993