Restructuring Costs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended		24 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012
Restructuring Costs
Expenses incurred	$ 2,145	$ 17,930	$ 20,075
Workforce Reductions And Related Severance Expenses
Restructuring Costs
Expenses incurred	519	4,124	4,643
Facility Closures And Consolidations
Restructuring Costs
Expenses incurred	838	7,213	8,051
Asset Impairments And Write-Downs
Restructuring Costs
Expenses incurred	$ 788	$ 6,593	$ 7,381