CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 8,596		$ 7,471
Net cash provided by (used in) operating activities	(19,596)		(8,050)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(25,018)		(18,921)
Investment in unconsolidated joint venture	(2,726)		0
Intercompany distributions			0
Investment sales	715	$ 715	0
Proceeds from sale of assets	484		107
Net cash used in investing activities	(26,545)		(18,814)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	(10,910)		(13,170)
Proceeds from long-term debt	79,874		10,279
Payments of long-term debt	(24,126)		(11,295)
Change in short-term borrowings	(147)		(1,201)
Financing costs	0		(29)
Tax effect from exercise/vesting of equity awards, net	2,291		342
Dividends paid	(2,281)		(1,910)
Other, net	104		102
Net cash provided by (used in) financing activities	44,805		(16,882)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(387)		(380)
Effect of exchange rate changes on cash and equivalents	(310)		(1,713)
NET DECREASE IN CASH AND EQUIVALENTS	(2,033)		(45,839)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	52,001		92,405
CASH AND EQUIVALENTS AT END OF PERIOD	49,968	52,001	46,566
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	8,596		7,471
Net cash provided by (used in) operating activities	(48,165)		1,703
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(54)		(12)
Investment in unconsolidated joint venture	0
Intercompany distributions			10,000
Investment sales	715
Proceeds from sale of assets	0		0
Net cash used in investing activities	661		9,988
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	(10,910)		(13,170)
Proceeds from long-term debt	62,000		10,000
Payments of long-term debt	(2,551)		(10,551)
Change in short-term borrowings	0		0
Financing costs			(29)
Tax effect from exercise/vesting of equity awards, net	2,291		342
Dividends paid	(2,281)		(1,910)
Other, net	104		102
Net cash provided by (used in) financing activities	48,653		(15,216)
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	1,149		(3,525)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	2,440		6,813
CASH AND EQUIVALENTS AT END OF PERIOD	3,589	2,440	3,288
Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	11,267		11,354
Net cash provided by (used in) operating activities	29,701		(19,874)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(22,017)		(16,534)
Investment in unconsolidated joint venture	(2,726)
Intercompany distributions			(10,000)
Investment sales	0
Proceeds from sale of assets	472		5
Net cash used in investing activities	(24,271)		(26,529)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	0		0
Proceeds from long-term debt	2,215		0
Payments of long-term debt	(524)		(432)
Change in short-term borrowings	0		0
Financing costs			0
Tax effect from exercise/vesting of equity awards, net	0		0
Dividends paid	0		0
Other, net	(5,684)		21,832
Net cash provided by (used in) financing activities	(3,993)		21,400
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	1,437		(25,003)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	10,671		31,522
CASH AND EQUIVALENTS AT END OF PERIOD	12,108	10,671	6,519
Non-Guarantor Companies [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	11,259		11,368
Net cash provided by (used in) operating activities	(1,132)		10,121
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	(2,947)		(2,375)
Investment in unconsolidated joint venture	$ 0
Intercompany distributions			0
Investment sales
Proceeds from sale of assets	$ 12		102
Net cash used in investing activities	(2,935)		(2,273)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury	0		0
Proceeds from long-term debt	15,659		279
Payments of long-term debt	(21,051)		(312)
Change in short-term borrowings	(147)		(1,201)
Financing costs			0
Tax effect from exercise/vesting of equity awards, net	0		0
Dividends paid	0		0
Other, net	5,684		(21,832)
Net cash provided by (used in) financing activities	145		(23,066)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in discontinued operations	(387)		(380)
Effect of exchange rate changes on cash and equivalents	(310)		(1,713)
NET DECREASE IN CASH AND EQUIVALENTS	(4,619)		(17,311)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD	38,890		54,070
CASH AND EQUIVALENTS AT END OF PERIOD	34,271	38,890	36,759
Elimination [Member]
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in unconsolidated joint venture	0
Investment sales	0
Elimination [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	(22,526)		(22,722)
Net cash provided by (used in) operating activities	0		0
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment	0		0
Intercompany distributions			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		0
Financing costs			0
Tax effect from exercise/vesting of equity awards, net	0		0
Dividends paid	0		0
Other, net	0		0
Net cash provided by (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		0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0	$ 0	$ 0