CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 5,827	$ 9,554	$ 127,096	$ 26,863
Net (income) from discontinued operations	1,615	(5,102)	(94,872)	(13,417)
Net cash provided by (used in) operating activities			2,791	25,402
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment	(11,520)	(7,037)	(33,148)	(22,575)
Acquired businesses, net of cash acquired			(429,545)	(6,051)
Intercompany distributions			0
Proceeds from sale of investments			0
Proceeds from sale of business			473,977	0
Proceeds from sale of assets			482	146
Net cash provided by (used in) investing activities - continuing operations			11,766	(28,480)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury			(45,588)	(15,796)
Proceeds from long-term debt			419,645	211,097
Payments of long-term debt			(262,031)	(147,729)
Change in short-term borrowings			0
Share premium payment on settled debt			0	(24,997)
Financing costs			(7,671)	(363)
Purchase of ESOP shares			0	(10,908)
Dividends paid			(46,816)	(7,766)
Other, net			139	(112)
Net cash provided by financing activities - continuing operations			57,678	3,426
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations			(62,273)	(3,381)
Effect of exchange rate changes on cash and equivalents			6,123	(72)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS			16,085	(3,105)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD			47,681	72,553
CASH AND EQUIVALENTS AT END OF PERIOD	63,766	69,448	63,766	69,448
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	5,827	9,554	127,096	26,863
Net (income) from discontinued operations	0	0	0	0
Net cash provided by (used in) operating activities			309,342	(14,445)
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment			(455)	(12)
Acquired businesses, net of cash acquired			(368,937)	0
Intercompany distributions			0
Proceeds from sale of investments			0
Proceeds from sale of business			0
Proceeds from sale of assets			0	0
Net cash provided by (used in) investing activities - continuing operations			(369,392)	(12)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury			(45,588)	(15,796)
Proceeds from long-term debt			411,718	200,656
Payments of long-term debt			(223,998)	(128,365)
Change in short-term borrowings			0
Share premium payment on settled debt			0	(24,997)
Financing costs			(7,671)	(363)
Purchase of ESOP shares			0	(10,908)
Dividends paid			(46,816)	(7,766)
Other, net			(22,246)	16,710
Net cash provided by financing activities - continuing operations			65,399	29,171
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			5,349	14,714
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD			3,240	6,517
CASH AND EQUIVALENTS AT END OF PERIOD	8,589	21,231	8,589	21,231
Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	(8,937)	8,335	55,242	21,515
Net (income) from discontinued operations	1,615	(3,685)	(77,172)	(9,839)
Net cash provided by (used in) operating activities			(536,893)	29,754
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment			(27,230)	(17,593)
Acquired businesses, net of cash acquired			(4,490)	0
Intercompany distributions			0
Proceeds from sale of investments			0
Proceeds from sale of business			473,977
Proceeds from sale of assets			46	146
Net cash provided by (used in) investing activities - continuing operations			442,303	(17,447)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury			0	0
Proceeds from long-term debt			2,232	0
Payments of long-term debt			(4,564)	(940)
Change in short-term borrowings			0
Share premium payment on settled debt			0	0
Financing costs			0	0
Purchase of ESOP shares			0	0
Dividends paid			0	0
Other, net			(19,855)	(16,745)
Net cash provided by financing activities - continuing operations			(22,187)	(17,685)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations			127,312	(10,764)
Effect of exchange rate changes on cash and equivalents			(131)	0
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS			10,404	(16,142)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD			8,066	27,692
CASH AND EQUIVALENTS AT END OF PERIOD	18,470	11,550	18,470	11,550
Non-Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	(4,487)	9,864	54,710	31,584
Net (income) from discontinued operations	0	(1,417)	(17,700)	(3,578)
Net cash provided by (used in) operating activities			230,342	14,586
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment			(5,463)	(4,970)
Acquired businesses, net of cash acquired			(56,118)	(6,051)
Intercompany distributions			0
Proceeds from sale of investments			0
Proceeds from sale of business			0
Proceeds from sale of assets			436	0
Net cash provided by (used in) investing activities - continuing operations			(61,145)	(11,021)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury			0	0
Proceeds from long-term debt			5,695	10,441
Payments of long-term debt			(33,469)	(18,424)
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			42,240	(4,570)
Net cash provided by financing activities - continuing operations			14,466	(12,553)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations			(189,585)	7,383
Effect of exchange rate changes on cash and equivalents			6,254	(72)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS			332	(1,677)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD			36,375	38,344
CASH AND EQUIVALENTS AT END OF PERIOD	36,707	36,667	36,707	36,667
Elimination [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	13,424	(18,199)	(109,952)	(53,099)
Net (income) from discontinued operations	0	0	0	0
Net cash provided by (used in) operating activities			0	(4,493)
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment			0	0
Acquired businesses, net of cash acquired			0	0
Intercompany distributions			0
Proceeds from sale of investments			0
Proceeds from sale of business			0
Proceeds from sale of assets			0	0
Net cash provided by (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
Share premium payment on settled debt			0	0
Financing costs			0	0
Purchase of ESOP shares			0	0
Dividends paid			0	0
Other, net			0	4,493
Net cash provided by financing activities - continuing operations			0	4,493
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	$ 0	$ 0