CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Activities:
Net income (loss)	$ 20,344	$ 4,410	$ (1,039)	$ (7,387)
Net (income) loss from discontinued operations	202	(5,380)	1,541	(8,364)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	15,351	10,642	48,949	34,133
Share-based compensation expense	4,402	2,603	10,760	5,100
Change in fair value of contingent consideration	1,163	(6)	1,833	446
Gain on sale of property, plant and equipment	(32,563)		(32,563)
Gain on sale of investment in real estate				(1,474)
Deferred income taxes	(948)	(10,013)	(6,773)	(10,198)
Changes in operating assets and liabilities, net of effects from acquisitions:	(6,897)	(35,026)	(105,364)	(44,047)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES FROM CONTINUING OPERATIONS	1,054	(32,770)	(82,656)	(31,791)
NET CASH PROVIDED BY OPERATING ACTIVITIES FROM DISCONTINUED OPERATIONS		8,364		14,497
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	1,054	(24,406)	(82,656)	(17,294)
Investing Activities:
Acquisition of businesses, net of cash acquired			(395,854)	(9,534)
Proceeds from sale of property, plant and equipment	44,891		44,891
Purchases of property, plant and equipment	(13,114)	(9,334)	(35,291)	(21,120)
Proceeds from sale of investment in real estate				2,400
Purchase of non-marketable debt and equity securities	(52,997)	(222)	(52,997)	(1,472)
NET CASH USED IN INVESTING ACTIVITIES FROM CONTINUING OPERATIONS	(21,220)	(9,556)	(439,251)	(29,726)
NET CASH PROVIDED BY INVESTING ACTIVITIES FROM DISCONTINUED OPERATIONS		133,795		133,795
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(21,220)	124,239	(439,251)	104,069
Financing Activities:
Proceeds from short-term borrowings	168,000	79,700	782,500	198,820
Principal payments on short-term borrowings	(146,000)	(156,700)	(551,500)	(253,820)
Deferred financing fees	(1,854)		(1,854)
Proceeds from stock issued under employee stock purchase plan		(88)	783	710
Purchase of common stock		(31)	(3,419)	(2,355)
Dividends paid			(4,205)	(3,676)
Contingent consideration payments related to acquisitions of businesses			(820)	(656)
Proceeds from equity offering, net			215,832
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	39,774	(50,921)	472,443	(34,779)
Effect of exchange rates on cash	(1,574)	342	(234)	(190)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	18,034	49,254	(49,698)	51,806
Cash and cash equivalents at the beginning of the period	71,876	71,129	139,608	68,577
CASH AND CASH EQUIVALENTS AT THE END OF THE PERIOD	89,910	120,383	89,910	120,383
Trafficware
Supplemental disclosure of non-cash investing and financing activities:
Receivable recognized in connection with the acquisition of net			1,588
Shield Aviation
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of contingent consideration	(700)		(400)
Gridsmart
Supplemental disclosure of non-cash investing and financing activities:
Receivable recognized in connection with the acquisition of net			442
Nuvotronics
Supplemental disclosure of non-cash investing and financing activities:
Liability recognized in connection with the acquisition of Nuvotronics, net			5,300
OpCo.
Financing Activities:
Proceeds from long-term borrowings	19,841	28,378	35,816	28,378
Deferred financing fees	$ (213)	$ (2,180)	$ (690)	$ (2,180)