Unaudited Consolidated Statements of Changes in Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities
Net (loss) income	$ (14,715)	$ 9,975
Reconciliation of net (loss) income to cash flows provided by operating activities:
Depreciation and amortization	47,252	40,363
Amortization of debt related costs (includes $0 and $2,994 write off of deferred financing fees)	1,231	4,145
Deferred income taxes	(11,411)	(6,013)
Share-based compensation	9,270	6,862
(Gain) loss on sale of property, plant and equipment	(122)	102
Foreign currency exchange losses (gains) on intercompany loans and other non-cash items	5,228	(2,934)
Changes in assets and liabilities
Accounts receivable	20,600	28,946
Inventories	(14,175)	(14,936)
Contract assets	(8,159)	(7,848)
Prepaids and other current assets	7,487	(5,156)
Accounts payable	(8,875)	22,821
Accrued expenses and other liabilities	(11,178)	(30,810)
Contract liabilities	5,774	(2,032)
Income taxes	(1,742)	1,849
Other non‑current assets and liabilities	879	(3,483)
Net cash provided by operating activities	27,344	41,851
Investing activities
Purchase of property, plant and equipment	(40,682)	(31,670)
Purchase of intangibles	(2,898)	(291)
Proceeds from sale of property, plant and equipment	2,875	539
Payments to Acquire Businesses, Net of Cash Acquired	2,048	(10,224)
Net cash used in investing activities	(38,657)	(41,646)
Financing activities
Issuance of debt, net of deferred issuance costs	10,663	(1,792)
Borrowings under credit facility	115,000	6,000
Repayment of debt	(120,856)	(111,161)
Repayment of capital lease obligation	(4,925)	(5,489)
Payment for Contingent Consideration Liability, Financing Activities	461	0
Proceeds from issuance of common stock	341	137,605
Taxes paid related to net share settlements of share-based compensation awards	(936)	(7,368)
Stock repurchases	0	(230)
Cash paid for interest rate cap	(2,235)	0
Distribution to non‑controlling interest	(600)	(1,550)
Net cash (used in) provided by financing activities	(4,009)	16,015
Effect of exchange rate changes on cash	(293)	268
Change in cash and cash equivalents	(15,615)	16,488
Cash and cash equivalents
Beginning of period	82,365	59,254
End of period	66,750	75,742
Supplemental disclosure of cash flow information
Cash paid for taxes	4,585	2,077
Cash paid for interest	26,180	20,503
Non‑cash investing and financing activities
Noncash or Part Noncash Acquisitions, Accrued Earnout	0	461
Capital lease transactions	$ 8,296	$ 3,948