CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income from continuing operations	$ 30,989	$ 12,264
Net (income) loss from discontinued operations	(8,158)	(5,220)
Net cash provided by (used in) operating activities	(5,654)	282
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(10,785)	(7,690)
Acquired businesses, net of cash acquired	198,683	6,051
Proceeds from sale of assets	439	86
Net cash used in investing activities	(209,029)	(13,655)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	(4,332)	(15,073)
Proceeds from long-term debt	326,094	39,056
Payments of long-term debt	(52,973)	(7,295)
Change in short-term borrowings	35	0
Share premium payment on settled debt	0
Financing costs	(7,392)	(172)
Purchase of ESOP shares	0	(9,213)
Dividends paid	(2,990)	(2,499)
Other, net	84	(349)
Net cash provided by financing activities	258,526	4,455
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(6,419)	(10,149)
Effect of exchange rate changes on cash and equivalents	(685)	(1,217)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS	36,739	(20,284)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	47,681	72,553
CASH AND EQUIVALENTS AT END OF PERIOD	84,420	52,269
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income from continuing operations	30,989	12,264
Net (income) loss from discontinued operations	0	0
Net cash provided by (used in) operating activities	(68,932)	(8,907)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(121)	(3)
Acquired businesses, net of cash acquired	194,001	0
Proceeds from sale of assets	0	0
Net cash used in investing activities	(194,122)	(3)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	(4,332)	(15,073)
Proceeds from long-term debt	326,094	32,213
Payments of long-term debt	(45,719)	(788)
Change in short-term borrowings	0
Share premium payment on settled debt	0
Financing costs	(7,392)	(172)
Purchase of ESOP shares	0	(9,213)
Dividends paid	(2,990)	(2,499)
Other, net	84	(349)
Net cash provided by financing activities	265,745	4,119
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 (DECREASE) IN CASH AND EQUIVALENTS	2,691	(4,791)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	3,240	6,517
CASH AND EQUIVALENTS AT END OF PERIOD	5,931	1,726
Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income from continuing operations	9,319	3,794
Net (income) loss from discontinued operations	(4,360)	(1,687)
Net cash provided by (used in) operating activities	48,147	(334)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(7,984)	(6,919)
Acquired businesses, net of cash acquired	4,682	0
Proceeds from sale of assets	7	86
Net cash used in investing activities	(12,659)	(6,833)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	0	0
Proceeds from long-term debt	976	0
Payments of long-term debt	(1,776)	(329)
Change in short-term borrowings	35
Share premium payment on settled debt	0
Financing costs	0	0
Purchase of ESOP shares	0	0
Dividends paid	0	0
Other, net	(10,524)	(243)
Net cash provided by financing activities	(11,289)	(572)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(827)	(6,204)
Effect of exchange rate changes on cash and equivalents	(1)	0
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS	23,371	(13,943)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	8,066	27,692
CASH AND EQUIVALENTS AT END OF PERIOD	31,437	13,749
Non-Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income from continuing operations	15,053	12,247
Net (income) loss from discontinued operations	(3,798)	(3,533)
Net cash provided by (used in) operating activities	15,131	9,523
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(2,680)	(768)
Acquired businesses, net of cash acquired	0	6,051
Proceeds from sale of assets	432	0
Net cash used in investing activities	(2,248)	(6,819)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	0	0
Proceeds from long-term debt	(976)	6,843
Payments of long-term debt	(5,478)	(6,178)
Change in short-term borrowings	0
Share premium payment on settled debt	0
Financing costs	0	0
Purchase of ESOP shares	0	0
Dividends paid	0	0
Other, net	10,524	243
Net cash provided by financing activities	4,070	908
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(5,592)	(3,945)
Effect of exchange rate changes on cash and equivalents	(684)	(1,217)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS	10,677	(1,550)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	36,375	38,344
CASH AND EQUIVALENTS AT END OF PERIOD	47,052	36,794
Elimination [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income from continuing operations	(24,372)	(16,041)
Net (income) loss from discontinued operations	0	0
Net cash provided by (used in) operating activities	0	0
CASH FLOWS FROM INVESTING ACTIVITIES:
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	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
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
Share premium payment on settled debt	0
Financing costs	0	0
Purchase of ESOP shares	0	0
Dividends paid	0	0
Other, net	0	0
Net cash provided by financing activities	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 (DECREASE) IN CASH AND EQUIVALENTS	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0	$ 0