CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 90,280	$ 5,045	$ 121,269	$ 17,309
Net (income) from discontinued operations	(88,329)	(3,095)	(96,487)	(8,315)
Net cash provided by (used in) operating activities			(38,846)	(14,227)
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment	(10,843)	(7,848)	(21,628)	(15,538)
Acquired businesses, net of cash acquired			(246,230)	(6,051)
Intercompany distributions			0
Proceeds from sale of investments			0
Proceeds from sale of business			473,977	0
Proceeds from sale of assets			454	102
Net cash provided by (used in) investing activities - continuing operations			206,573	(21,487)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury			(32,861)	(15,758)
Proceeds from long-term debt			347,898	195,655
Payments of long-term debt			(229,941)	(120,166)
Change in short-term borrowings			0
Share premium payment on settled debt			0	(24,997)
Financing costs			(7,451)	(335)
Purchase of ESOP shares			0	(9,213)
Dividends paid			(5,872)	(5,137)
Other, net			126	(187)
Net cash provided by (used in) financing activities - continuing operations			71,899	19,862
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations			(48,383)	(8,263)
Effect of exchange rate changes on cash and equivalents			(2,468)	(1,013)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS			188,775	(25,128)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD		47,425	47,681	72,553
CASH AND EQUIVALENTS AT END OF PERIOD	236,456	47,425	236,456	47,425
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	90,280	5,045	121,269	17,309
Net (income) from discontinued operations	0	0	0	0
Net cash provided by (used in) operating activities			283,873	(50,095)
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment			(331)	(11)
Acquired businesses, net of cash acquired			(185,729)	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			(186,060)	(11)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury			(32,861)	(15,758)
Proceeds from long-term debt			342,161	185,213
Payments of long-term debt			(197,322)	(101,577)
Change in short-term borrowings			0
Share premium payment on settled debt			0	(24,997)
Financing costs			(7,451)	(335)
Purchase of ESOP shares			0	(9,213)
Dividends paid			(5,872)	(5,137)
Other, net			(22,279)	16,809
Net cash provided by (used in) financing activities - continuing operations			76,376	45,005
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			174,189	(5,101)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD		1,416	3,240	6,517
CASH AND EQUIVALENTS AT END OF PERIOD	177,429		177,429
Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	(28,847)	9,385	(19,529)	13,179
Net (income) from discontinued operations	9,282	(4,466)	4,921	(6,154)
Net cash provided by (used in) operating activities			(360,855)	22,759
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment			(16,208)	(11,878)
Acquired businesses, net of cash acquired			(5,076)	0
Intercompany distributions			0
Proceeds from sale of investments			0
Proceeds from sale of business			473,977
Proceeds from sale of assets			21	102
Net cash provided by (used in) investing activities - continuing operations			452,714	(11,776)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury			0	0
Proceeds from long-term debt			2,195	0
Payments of long-term debt			(1,613)	(664)
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			(40,668)	(12,434)
Net cash provided by (used in) financing activities - continuing operations			(40,086)	(13,098)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations			(36,875)	(18,172)
Effect of exchange rate changes on cash and equivalents			(27)	0
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS			14,871	(20,287)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD		7,405	8,066	27,692
CASH AND EQUIVALENTS AT END OF PERIOD	22,937		22,937
Non-Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	127,851	9,473	142,905	21,720
Net (income) from discontinued operations	(97,611)	1,371	(101,408)	(2,161)
Net cash provided by (used in) operating activities			38,136	17,611
CASH FLOWS FROM INVESTING ACTIVITIES - CONTINUING OPERATIONS:
Acquisition of property, plant and equipment			(5,089)	(3,649)
Acquired businesses, net of cash acquired			(55,425)	(6,051)
Intercompany distributions			0
Proceeds from sale of investments			0
Proceeds from sale of business			0
Proceeds from sale of assets			433	0
Net cash provided by (used in) investing activities - continuing operations			(60,081)	(9,700)
CASH FLOWS FROM FINANCING ACTIVITIES - CONTINUING OPERATIONS:
Purchase of shares for treasury			0	0
Proceeds from long-term debt			3,542	10,442
Payments of long-term debt			(31,006)	(17,925)
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			63,073	(9,064)
Net cash provided by (used in) financing activities - continuing operations			35,609	(16,547)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations			(11,508)	9,909
Effect of exchange rate changes on cash and equivalents			(2,441)	(1,013)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS			(285)	260
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD		38,604	36,375	38,344
CASH AND EQUIVALENTS AT END OF PERIOD	36,090		36,090
Elimination [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	(99,004)	(18,858)	(123,376)	(34,899)
Net (income) from discontinued operations	0	0	0	0
Net cash provided by (used in) operating activities			0	(4,502)
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	4,502
Net cash provided by (used in) financing activities - continuing operations			0	4,502
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	$ 0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0		$ 0