CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Operating Activities:
Net income	$ 3,371	$ 39,883	$ 12,036
Net income (loss) from discontinued operations	(436)	1,423	(4,243)
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	88,482	64,742	46,600
Share-based compensation expense	22,728	15,488	7,515
Change in fair value of contingent consideration	(1,856)	(1,005)	1,029
Change in fair value of interest rate swap of consolidated VIE	18,687
Gain on sale of property, plant and equipment	(170)	(32,510)
Gain on sale of investment in real estate			(1,474)
Deferred income taxes	15,160	3,363	6,860
Deferred compensation	(1,470)	(436)	41
Net pension benefit	(833)	(1,337)	(2,770)
Loss on extinguishment of debt	16,090
Other items	2,202
Changes in operating assets and liabilities, net of effects from acquisitions
Accounts receivable	(35,177)	44,473	(34,762)
Contract assets	84,899	(83,697)
Inventories	(19,720)	(31,544)	3,023
Prepaid expenses and other current assets	6,443	5,317	(15,455)
Long-term financing receivables	(133,894)	(56,575)
Long-term capitalized contract costs			(29,552)
Operating lease right of use assets	(9,715)
Accounts payable and other current liabilities	(3,031)	27,792	30,423
Contract liabilities	27,531	(15,359)	21,566
Income taxes	(8,610)	(17,268)	(361)
Operating lease liability	6,894
Other items, net	(55,546)	12,125	(18,167)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES FROM CONTINUING OPERATIONS	(8,291)	(31,851)	8,589
NET CASH PROVIDED BY OPERATING ACTIVITIES FROM DISCONTINUED OPERATIONS	3,417		10,376
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	(4,874)	(31,851)	18,965
Investing Activities:
Acquisition of businesses, net of cash acquired	(234,788)	(393,908)	(16,322)
Proceeds from sale of property, plant and equipment		44,891
Purchases of property, plant and equipment	(49,247)	(49,084)	(31,696)
Proceeds from sale of investment in real estate			2,400
Purchase of non-marketable debt and equity securities	(1,173)	(60,694)	(1,500)
Receipt of withheld proceeds from sale of trade receivables	5,521	5,500
NET CASH USED IN INVESTING ACTIVITIES	(279,687)	(458,795)	(47,118)
NET CASH PROVIDED BY INVESTING ACTIVITIES FROM DISCONTINUED OPERATIONS			133,795
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(279,687)	(458,795)	86,677
Financing Activities:
Proceeds from short-term borrowings	1,100,163	898,000	269,770
Principal payments on short-term borrowings	(1,080,000)	(702,500)	(324,770)
Debt extinguishment make whole payment	(15,856)
Proceeds from stock issued under employee stock purchase plan	2,493	1,832	1,517
Purchase of common stock	(3,707)	(3,688)	(2,449)
Dividends paid	(8,431)	(8,414)	(7,355)
Contingent consideration payments related to acquisitions of businesses		(820)	(1,156)
Equity contribution from Boston VIE partner	1,892		24,349
Proceeds from equity offering, net		215,832
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	340,755	448,497	(31,676)
Effect of exchange rates on cash	5,169	(1,838)	(2,935)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	61,363	(43,987)	71,031
Cash, cash equivalents and restricted cash at the beginning of the period	95,621	139,608	68,577
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT THE END OF THE PERIOD	156,984	95,621	139,608
Supplemental disclosure of non-cash investing and financing activities:
Withheld proceeds from the sale of trade receivables to be received in fiscal 2021	1,842
Delerrok Inc.
Adjustments to reconcile net income to net cash used in operating activities:
Change in fair value of contingent consideration	(700)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred/recognized in connection with the acquisition	1,600
Nuvotronics
Adjustments to reconcile net income to net cash used in operating activities:
Change in fair value of contingent consideration	(4,200)	(700)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred/recognized in connection with the acquisition		4,900
Shield Aviation
Adjustments to reconcile net income to net cash used in operating activities:
Change in fair value of contingent consideration	1,800	(1,800)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred/recognized in connection with the acquisition			6,248
Cubic Corporation Excluding VIE
Financing Activities:
Proceeds from long-term borrowings	450,000
Principal payments on long-term borrowings	(205,622)
Deferred financing fees	(3,354)	(1,907)
VIE
Financing Activities:
Proceeds from long-term borrowings	204,905	$ 50,162	13,196
Principal payments on long-term borrowings	(92,575)
Deferred financing fees	$ (9,153)		$ (4,778)