CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Detail) - Summary of consolidated cash flows (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 3,448	$ 9,048	$ 2,027	$ 2,488	$ 3,378	$ 4,872	$ (14,001)	$ (1,680)	$ 17,011	$ (7,431)	$ 9,592
Net cash provided by (used in) operating activities									90,130	35,385	83,125
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment									(68,851)	(87,617)	(40,477)
Acquired business, net of cash acquired									(22,432)	(855)	(542,000)
Intercompany distributions									0	0	0
Change in equipment lease deposits											(1,666)
Funds restricted for capital projects									0	4,629	0
Proceeds from sale of investment									309	1,510
Net cash provided by (used in) investing activities									(90,974)	(82,333)	(584,143)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury									(10,382)	(18,139)	0
Proceeds from issuance of common stock									0	0	2,823
Proceeds from issuance of long-term debt									4,000	674,251	543,875
Payments of long-term debt									(18,546)	(498,572)	(176,802)
Change in short-term borrowings									(1,859)	3,538	0
Intercompany debt									0	0
Financing costs									(97)	(21,653)	(17,455)
Purchase of ESOP shares									0	(19,973)	0
Exercise of stock options									0	2,306	343
Tax effect from exercise/vesting of equity awards, net									834	7	325
Dividend									(4,743)
Other, net									100	345	184
Net cash provided by (used in) financing activities									(30,693)	122,110	353,293
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in operating activities									(2,801)
Net cash used in discontinued operations									(2,801)	(962)	(638)
Effect of exchange rate changes on cash and equivalents									963	(973)	(2,668)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS									(33,375)	73,227	(151,031)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				243,029				169,802	243,029	169,802	320,833
CASH AND EQUIVALENTS AT END OF PERIOD	209,654				243,029				209,654	243,029	169,802
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)									18,353	(7,955)	9,592
Net cash provided by (used in) operating activities									(24,315)	43,407	(10,163)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment									(155)	(418)	(720)
Acquired business, net of cash acquired									0	0	(167,950)
Intercompany distributions									10,000	10,000	10,000
Change in equipment lease deposits											0
Funds restricted for capital projects										0
Proceeds from sale of investment									0	0
Net cash provided by (used in) investing activities									9,845	9,582	(158,670)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury									(10,382)	(18,139)
Proceeds from issuance of common stock											2,823
Proceeds from issuance of long-term debt									(23,000)	569,973	100,000
Payments of long-term debt									(1,625)	(625)	(79,473)
Change in short-term borrowings									0	0
Intercompany debt									0	(468,372)
Financing costs									(65)	(14,663)	(4,278)
Purchase of ESOP shares										(19,973)
Exercise of stock options										2,306	343
Tax effect from exercise/vesting of equity awards, net									834	7	325
Dividend									(4,743)
Other, net									96	345	182
Net cash provided by (used in) financing activities									(38,885)	50,859	19,922
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in operating activities									0
Net cash used in discontinued operations									0	0	0
Effect of exchange rate changes on cash and equivalents									0	0	0
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS									(53,355)	103,848	(148,911)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				178,448				74,600	178,448	74,600	223,511
CASH AND EQUIVALENTS AT END OF PERIOD	125,093				178,448				125,093	178,448	74,600
Guarantor Subsidiaries [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)									31,646	23,350	38,252
Net cash provided by (used in) operating activities									93,349	38,657	87,620
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment									(63,388)	(55,455)	(28,713)
Acquired business, net of cash acquired									(22,432)	(1,066)	0
Intercompany distributions									(10,000)	(10,000)	(10,000)
Change in equipment lease deposits											(1,666)
Funds restricted for capital projects										4,629
Proceeds from sale of investment									200	68
Net cash provided by (used in) investing activities									(95,620)	(61,824)	(40,379)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury									0	0
Proceeds from issuance of common stock											0
Proceeds from issuance of long-term debt									491,372	0	40,000
Payments of long-term debt									(4,351)	(31,138)	(85,086)
Change in short-term borrowings									0	0
Intercompany debt									0	0
Financing costs									0	0	0
Purchase of ESOP shares										0
Exercise of stock options										0	0
Tax effect from exercise/vesting of equity awards, net									0	0	0
Dividend									(219,516)
Other, net									(245,616)	12,356	17,093
Net cash provided by (used in) financing activities									21,889	(18,782)	(27,993)
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in operating activities									0
Net cash used in discontinued operations									0	0	0
Effect of exchange rate changes on cash and equivalents									0	0	0
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS									19,618	(41,949)	19,248
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				15,164				57,113	15,164	57,113	37,865
CASH AND EQUIVALENTS AT END OF PERIOD	34,782				15,164				34,782	15,164	57,113
Non-Guarantor Subsidiaries [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)									31,500	7,013	28,844
Net cash provided by (used in) operating activities									21,096	(46,679)	5,668
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment									(5,308)	(31,744)	(11,044)
Acquired business, net of cash acquired									0	211	(374,050)
Intercompany distributions									0	0	0
Change in equipment lease deposits											0
Funds restricted for capital projects										0
Proceeds from sale of investment									109	1,442
Net cash provided by (used in) investing activities									(5,199)	(30,091)	(385,094)
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury									0	0
Proceeds from issuance of common stock											0
Proceeds from issuance of long-term debt									27,000	104,278	403,875
Payments of long-term debt									(12,570)	(466,809)	(12,243)
Change in short-term borrowings									(1,859)	3,538
Intercompany debt									0	468,372
Financing costs									(32)	(6,990)	(13,177)
Purchase of ESOP shares										0
Exercise of stock options										0	0
Tax effect from exercise/vesting of equity awards, net									0	0	0
Dividend									219,516
Other, net									(245,752)	(12,356)	(17,091)
Net cash provided by (used in) financing activities									(13,697)	90,033	361,364
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in operating activities									(2,801)
Net cash used in discontinued operations									(2,801)	(962)	(638)
Effect of exchange rate changes on cash and equivalents									963	(973)	(2,668)
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS									362	11,328	(21,368)
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				49,417				38,089	49,417	38,089	59,457
CASH AND EQUIVALENTS AT END OF PERIOD	49,779				49,417				49,779	49,417	38,089
Consolidation, Eliminations [Member]
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)									(64,488)	(29,839)	(67,096)
Net cash provided by (used in) operating activities									0	0	0
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of property, plant and equipment									0	0	0
Acquired business, net of cash acquired									0	0	0
Intercompany distributions									0	0	0
Change in equipment lease deposits											0
Funds restricted for capital projects										0
Proceeds from sale of investment									0	0
Net cash provided by (used in) investing activities									0	0	0
CASH FLOWS FROM FINANCING ACTIVITIES:
Purchase of shares for treasury									0	0
Proceeds from issuance of common stock											0
Proceeds from issuance of long-term debt									(491,372)	0	0
Payments of long-term debt									0	0	0
Change in short-term borrowings									0	0
Intercompany debt									0	0
Financing costs									0	0	0
Purchase of ESOP shares										0
Exercise of stock options										0	0
Tax effect from exercise/vesting of equity awards, net									0	0	0
Dividend									0
Other, net									491,372	0	0
Net cash provided by (used in) financing activities									0	0	0
CASH FLOWS FROM DISCONTINUED OPERATIONS:
Net cash used in operating activities									0
Net cash used in discontinued operations									0	0	0
Effect of exchange rate changes on cash and equivalents									0	0	0
NET INCREASE (DECREASE) IN CASH AND EQUIVALENTS									0	0	0
CASH AND EQUIVALENTS AT BEGINNING OF PERIOD				0				0	0	0	0
CASH AND EQUIVALENTS AT END OF PERIOD	$ 0				$ 0				$ 0	$ 0	$ 0