BUSINESS SEGMENTS (Detail) - Segment information by geographic region was as follows: (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
Consolidated revenue	$ 447,436	$ 480,246	$ 482,431	$ 451,032	$ 484,989	$ 455,282	$ 476,129	$ 414,402	$ 1,861,145	$ 1,830,802	$ 1,293,996
Consolidated property, plant and equipment	356,879				350,050				356,879	350,050	314,760
United States [Member]
Consolidated revenue									1,317,911	1,265,977	880,480
Consolidated property, plant and equipment	254,080				234,876				254,080	234,876	216,659
Europe [Member]
Consolidated revenue									255,323	262,518	220,507
Canada [Member]
Consolidated revenue									120,457	125,330	68,934
South America [Member]
Consolidated revenue									93,243	96,340	70,450
All Other Countries [Member]
Consolidated revenue									74,210	80,637	53,625
Consolidated property, plant and equipment	37,049				40,949				37,049	40,949	36,241
Germany [Member]
Consolidated property, plant and equipment	$ 65,750				$ 74,225				$ 65,750	$ 74,225	$ 61,860