Unaudited Consolidated Statements of Changes in Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating activities
Net income (loss)	$ 53,506	$ (16,288)
Reconciliation of net income (loss) to cash flows provided by operating activities:
Depreciation and amortization	25,143	23,090
Amortization of debt related costs	701	556
Deferred income taxes	(679)	(766)
Share-based compensation	3,680	4,525
Loss (gain) on sale of property, plant and equipment	173	(100)
Gain on sale of business	(58,279)	0
Foreign currency exchange (gains) losses on intercompany loans and other non-cash items	(6,086)	4,661
Changes in assets and liabilities
Accounts receivable	11,087	12,995
Inventories	(14,613)	(20,502)
Contract assets	3,042	7,220
Prepaids and other current assets	(631)	5,988
Accounts payable	(11,056)	(9,143)
Accrued expenses and other liabilities	(9,378)	(15,394)
Contract liabilities	4,651	12,012
Income taxes	1,388	(4,503)
Other non‑current assets and liabilities	2,083	(217)
Net cash provided by operating activities	4,732	4,134
Investing activities
Purchase of property, plant and equipment	(17,572)	(17,569)
Purchase of intangibles	(210)	(341)
Proceeds from sale of property, plant and equipment	251	237
Proceeds from sale of business, net of cash of $12,117	108,921	0
Acquisitions, net of $0 cash received	(11,160)	0
Net cash provided by (used in) investing activities	80,230	(17,673)
Financing activities
Issuance of debt, net of deferred issuance costs	3,532	4,022
Borrowings under credit facility	13	15,000
Repayment of debt	(3,793)	(17,891)
Repayment of capital lease obligation	(4,162)	(3,285)
Payment of earn-out related to previous acquisitions	(175)	0
Proceeds from issuance of common stock	4,046	68
Taxes paid related to net share settlements of share-based compensation awards	0	(15)
Cash paid for interest rate cap	0	(2,235)
Distribution to non‑controlling interest	(1,250)	(600)
Net cash used in financing activities	(1,789)	(4,936)
Effect of exchange rate changes on cash	1,849	(724)
Change in cash and cash equivalents	85,022	(19,199)
Cash and cash equivalents
Beginning of period	109,881	82,365
End of period	194,903	63,166
Supplemental disclosure of cash flow information
Cash paid for taxes	1,382	1,037
Cash paid for interest	12,268	13,323
Non‑cash investing and financing activities
Finance lease transactions	1,782	2,584
Operating lease transactions	4,734	0
Option and Purchase Right	$ 7,673	$ 0