CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 8,753	$ 30,989
Net (income) from discontinued operations	0	(8,158)
Net cash provided by (used in) operating activities	1,041	(5,654)
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment	(8,397)	(10,785)
Acquired businesses, net of cash acquired	(9,219)	(198,683)
Proceeds from sale of assets	51	439
Net cash used in investing activities - continuing operations	(17,565)	(209,029)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury	(1,348)	(4,332)
Proceeds from long-term debt	38,965	326,094
Payments of long-term debt	(4,322)	(52,973)
Change in short-term borrowings	38	35
Financing costs	(67)	(7,392)
Contingent consideration for acquired businesses	(1,686)	0
Dividends paid	(3,143)	(2,990)
Other, net	137	84
Net cash provided by financing activities - continuing operations	28,574	258,526
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(458)	(6,419)
Effect of exchange rate changes on cash and equivalents	402	(685)
NET INCREASE IN CASH AND EQUIVALENTS	11,994	36,739
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	69,758	47,681
CASH AND EQUIVALENTS AT END OF PERIOD	81,752	84,420
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	8,753	30,989
Net (income) from discontinued operations		0
Net cash provided by (used in) operating activities	(23,532)	(68,932)
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment	(18)	(121)
Acquired businesses, net of cash acquired	(9,219)	(194,001)
Proceeds from sale of assets	0	0
Net cash used in investing activities - continuing operations	(9,237)	(194,122)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury	(1,348)	(4,332)
Proceeds from long-term debt	32,412	326,094
Payments of long-term debt	(569)	(45,719)
Change in short-term borrowings	0	0
Financing costs	(67)	(7,392)
Contingent consideration for acquired businesses	0
Dividends paid	(3,143)	(2,990)
Other, net	137	84
Net cash provided by financing activities - continuing operations	27,422	265,745
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and equivalents	0	0
NET INCREASE IN CASH AND EQUIVALENTS	(5,347)	2,691
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	15,976	3,240
CASH AND EQUIVALENTS AT END OF PERIOD	10,629	5,931
Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	16,804	9,319
Net (income) from discontinued operations		(4,360)
Net cash provided by (used in) operating activities	16,272	48,147
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment	(6,935)	(7,984)
Acquired businesses, net of cash acquired	0	(4,682)
Proceeds from sale of assets	38	7
Net cash used in investing activities - continuing operations	(6,897)	(12,659)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury	0	0
Proceeds from long-term debt	0	976
Payments of long-term debt	(855)	(1,776)
Change in short-term borrowings	38	35
Financing costs	0	0
Contingent consideration for acquired businesses	0
Dividends paid	0	0
Other, net	7,240	(10,524)
Net cash provided by financing activities - continuing operations	6,423	(11,289)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	0	(827)
Effect of exchange rate changes on cash and equivalents	(55)	(1)
NET INCREASE IN CASH AND EQUIVALENTS	15,743	23,371
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	16,353	8,066
CASH AND EQUIVALENTS AT END OF PERIOD	32,096	31,437
Non-Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	16,847	15,053
Net (income) from discontinued operations		(3,798)
Net cash provided by (used in) operating activities	8,301	15,131
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment	(1,444)	(2,680)
Acquired businesses, net of cash acquired	0	0
Proceeds from sale of assets	13	432
Net cash used in investing activities - continuing operations	(1,431)	(2,248)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury	0	0
Proceeds from long-term debt	6,553	(976)
Payments of long-term debt	(2,898)	(5,478)
Change in short-term borrowings	0	0
Financing costs	0	0
Contingent consideration for acquired businesses	(1,686)
Dividends paid	0	0
Other, net	(7,240)	10,524
Net cash provided by financing activities - continuing operations	(5,271)	4,070
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(458)	(5,592)
Effect of exchange rate changes on cash and equivalents	457	(684)
NET INCREASE IN CASH AND EQUIVALENTS	1,598	10,677
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	37,429	36,375
CASH AND EQUIVALENTS AT END OF PERIOD	39,027	47,052
Elimination [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	(33,651)	(24,372)
Net (income) from discontinued operations		0
Net cash provided by (used in) operating activities	0	0
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment	0	0
Acquired businesses, net of cash acquired	0	0
Proceeds from sale of assets	0	0
Net cash used in investing activities - continuing operations	0	0
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury	0	0
Proceeds from long-term debt	0	0
Payments of long-term debt	0	0
Change in short-term borrowings	0	0
Financing costs	0	0
Contingent consideration for acquired businesses	0
Dividends paid	0	0
Other, net	0	0
Net cash provided by financing activities - continuing operations	0	0
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	0	0
Effect of exchange rate changes on cash and equivalents	0	0
NET INCREASE IN CASH AND EQUIVALENTS	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0	$ 0