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, 2015	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 10,893		$ 14,464	$ 23,486	$ (8,125)
Net cash provided by (used in) operating activities				29,586	49,856
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(15,652)		(20,014)	(55,365)	(54,859)
Acquired businesses, net of cash acquired				(2,225)	(62,306)
Intercompany distributions				0	0
Investment sales (purchases)		$ 8,891		8,891	(8,402)
Proceeds from sale of assets				275	491
Net cash used in investing activities				(48,424)	(125,076)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock				371	584
Purchase of shares for treasury				(58,218)	(72,518)
Proceeds from long-term debt				121,523	682,913
Payments of long-term debt				(80,495)	(602,134)
Change in short-term borrowings				(81)	3,138
Financing costs				(592)	(10,928)
Purchase of ESOP shares				0	(10,000)
Tax effect from exercise/vesting of equity awards, net				345	273
Dividend				(5,807)	(4,841)
Other, net				206	194
Net cash used in financing activities				(22,748)	(13,319)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations				(830)	(1,018)
Effect of exchange rate changes on cash and equivalents				(4,034)	(1,136)
NET DECREASE IN CASH AND EQUIVALENTS				(46,450)	(90,693)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				92,405	178,130
CASH AND EQUIVALENTS AT END OF PERIOD	45,955		87,437	45,955	87,437
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	10,893		14,464	23,486	(8,125)
Net cash provided by (used in) operating activities				4,582	(10,966)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment				(203)	(672)
Acquired businesses, net of cash acquired				0	0
Intercompany distributions				10,000	10,000
Investment sales (purchases)				8,891	(8,402)
Proceeds from sale of assets				0	0
Net cash used in investing activities				18,688	926
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock				371	584
Purchase of shares for treasury				(58,218)	(72,518)
Proceeds from long-term debt				112,000	649,568
Payments of long-term debt				(73,652)	(597,613)
Change in short-term borrowings				0	0
Financing costs				(592)	(10,393)
Purchase of ESOP shares					(10,000)
Tax effect from exercise/vesting of equity awards, net				345	273
Dividend				(5,807)	(9,841)
Other, net				206	194
Net cash used in financing activities				(25,347)	(49,746)
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 DECREASE IN CASH AND EQUIVALENTS				(2,077)	(59,786)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				6,813
CASH AND EQUIVALENTS AT END OF PERIOD	4,736		9,208	4,736	9,208
Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	16,038		12,401	38,959	32,818
Net cash provided by (used in) operating activities				16,063	(8,300)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment				(40,918)	(45,749)
Acquired businesses, net of cash acquired				(2,225)	(1,000)
Intercompany distributions				(10,000)	(10,000)
Investment sales (purchases)				0	0
Proceeds from sale of assets				90	298
Net cash used in investing activities				(53,053)	(56,451)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock				0	0
Purchase of shares for treasury				0	0
Proceeds from long-term debt				116	(253)
Payments of long-term debt				(1,009)	(708)
Change in short-term borrowings				0	0
Financing costs				0	0
Purchase of ESOP shares					0
Tax effect from exercise/vesting of equity awards, net				0	0
Dividend				0	5,000
Other, net				19,254	54,869
Net cash used in financing activities				18,361	58,908
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 DECREASE IN CASH AND EQUIVALENTS				(18,629)	(5,843)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				31,522
CASH AND EQUIVALENTS AT END OF PERIOD	12,893		19,500	12,893	19,500
Non-Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	16,105		12,490	37,615	33,066
Net cash provided by (used in) operating activities				8,941	69,122
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment				(14,244)	(8,438)
Acquired businesses, net of cash acquired				0	(61,306)
Intercompany distributions				$ 0	0
Investment sales (purchases)					0
Proceeds from sale of assets				$ 185	193
Net cash used in investing activities				(14,059)	(69,551)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock				0	0
Purchase of shares for treasury				0	0
Proceeds from long-term debt				9,407	33,598
Payments of long-term debt				(5,834)	(3,813)
Change in short-term borrowings				(81)	3,138
Financing costs				0	(535)
Purchase of ESOP shares					0
Tax effect from exercise/vesting of equity awards, net				0	0
Dividend				0	0
Other, net				(19,254)	(54,869)
Net cash used in financing activities				(15,762)	(22,481)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations				(830)	(1,018)
Effect of exchange rate changes on cash and equivalents				(4,034)	(1,136)
NET DECREASE IN CASH AND EQUIVALENTS				(25,744)	(25,064)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				54,070
CASH AND EQUIVALENTS AT END OF PERIOD	28,326		58,729	28,326	58,729
Elimination [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquired businesses, net of cash acquired				0
Investment sales (purchases)				0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock				0
Elimination [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	(32,143)		(24,891)	(76,574)	(65,884)
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
Intercompany distributions				0	0
Investment sales (purchases)					0
Proceeds from sale of assets				0	0
Net cash used in investing activities				0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuance of common stock					0
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
Purchase of ESOP shares					0
Tax effect from exercise/vesting of equity awards, net				0	0
Dividend				0	0
Other, net				0	0
Net cash used in 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 DECREASE IN CASH AND EQUIVALENTS				0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0		$ 0	$ 0	$ 0