CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Operating Activities:
Net income (loss)	$ 12,036	$ (11,209)	$ 1,735
Net income from discontinued operations	(4,243)	(14,531)	(13,815)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	46,600	48,045	40,323
Share-based compensation expense	7,515	5,012	7,748
Change in fair value of contingent consideration	1,029	(3,878)	1,274
Gain (loss) on disposal of assets	(1,474)	405
Deferred income taxes	(6,860)	(917)	(27,709)
Net pension cost (benefit)	(2,770)	(1,046)	1,102
Excess tax benefits from equity incentive plans		(35)	3
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(34,762)	(45,443)	(184)
Inventories	3,023	(18,867)	(62)
Prepaid expenses and other current assets	(15,455)	7,286	4,494
Long-term capitalized contract costs	(29,552)	8,911	7,635
Accounts payable and other current liabilities	30,423	13,389	25,613
Customer advances	21,566	7,383	(24,908)
Income taxes	(361)	8,240	(5,519)
Other items, net	(18,126)	(5,756)	6,294
NET CASH PROVIDED BY (USED IN) CONTINUING OPERATING ACTIVITIES	8,589	(3,011)	24,024
NET CASH PROVIDED BY OPERATING ACTIVITIES FROM DISCONTINUED OPERATIONS	10,376	27,747	20,578
NET CASH PROVIDED BY OPERATING ACTIVITIES	18,965	24,736	44,602
Investing Activities:
Acquisition of businesses, net of cash acquired	(16,322)	(16,830)	(243,459)
Purchases of marketable securities		(19,121)	(28,470)
Proceeds from sales or maturities of marketable securities		31,868	43,456
Purchases of property, plant and equipment	(31,696)	(36,916)	(32,093)
Purchase of non-marketable debt and equity securities	(1,500)	(2,700)
Proceeds from the sale of assets	2,400
NET CASH USED IN INVESTING ACTIVITIES FROM CONTINUING OPERATIONS	(47,118)	(43,699)	(260,566)
NET CASH PROVIDED BY INVESTING ACTIVITIES FROM DISCONTINUED OPERATIONS	133,795	1,217
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	86,677	(42,482)	(260,566)
Financing Activities:
Proceeds from short-term borrowings	269,770	130,780	288,900
Principal payments on short-term borrowings	(324,770)	(315,780)	(108,900)
Principal payments on long-term debt		(978)	(494)
Proceeds from stock issued under employee stock purchase plan	1,517	2,234
Purchase of common stock	(2,449)	(2,444)	(1,563)
Dividends paid	(7,355)	(7,341)	(7,285)
Excess tax benefits from equity incentive plans		35	(3)
Contingent consideration payments related to acquisitions of businesses	(1,156)	(2,625)	(2,479)
Equity contribution from Boston SPV partner	24,349
Net change in restricted cash	(19,509)	66,293	(6,403)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(51,185)	(129,826)	233,126
Effect of exchange rates on cash	(2,392)	10,588	(38,511)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	52,065	(136,984)	(21,349)
Cash and cash equivalents at the beginning of the period	60,143	197,127	218,476
CASH AND CASH EQUIVALENTS AT THE END OF THE PERIOD	112,208	60,143	197,127
Shield Aviation
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net	6,248
Deltenna
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net		1,327
Vocality
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net		$ 271
GATR
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net			6,788
TeraLogics
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net			4,998
H4 Global
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net			952
Cubic Corporation Excluding VIE
Financing Activities:
Proceeds from long-term borrowings			75,000
Deferred financing fees			$ (3,647)
OpCo.
Financing Activities:
Proceeds from long-term borrowings	13,196
Deferred financing fees	$ (4,778)