Significant Accounting Policies Comprehensive Income Tax Effects (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012
Total	$ 2,996	$ 2,108	$ 12,764
Accumulated Other Comprehensive Income (Loss), Net of Tax	(14,446)	(7,497)	6,568	(33,435)
Other Comprehensive Income (Loss), Adjustment Before Reclassifications and Tax	(26,108)	(25,193)	(32,142)
Other Comprehensive Income (Loss), Reclassification Adjustment	3,997	13,430	7,711
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(22,111)	(11,763)	(24,431)
Valuation allowance adjustment	126	2,706	(2,398)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(18,989)	(6,949)	(14,065)
Cash Flow Hedging [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,327)	(5,755)	851	218
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(1,824)	(5,992)	(15,621)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	3,097	13,422	6,356
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, before Tax, Portion Attributable to Parent	1,273	7,430	(9,265)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	(636)	(2,671)	2,775
Valuation allowance adjustment	908	(331)	(116)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	1,545	4,428	(6,606)
Foreign Currency Gain (Loss) [Member]
Translation Adjustment	0	2,742	1,085
Accumulated Other Comprehensive Income (Loss), Net of Tax	8,377	18,984	5,907	(225)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	(8,602)	(12,857)	11,511
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment Realized upon Sale or Liquidation, before Tax	0	0	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax	(8,602)	(12,857)	11,511
Valuation allowance adjustment	0	(492)	481
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(8,602)	(10,607)	13,077
Pension Plans, Defined Benefit [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	21,496	(20,726)	(190)	(33,428)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments and Tax	(15,682)	(6,344)	(28,032)
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	900	8	1,355
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax, Portion Attributable to Parent	(14,782)	(6,336)	(26,677)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized (Gain) Loss Arising During Period, Tax	3,632	2,037	8,904
Valuation allowance adjustment	(782)	3,529	(2,763)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent	$ (11,932)	$ (770)	$ (20,536)