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
Total expenses incurred	$ 2,145	$ 17,930	$ 20,075
Workforce Reductions And Related Severance Expenses
Restructuring Costs
Total expenses incurred	519	4,124	4,643
Facility Closures And Consolidations
Restructuring Costs
Total expenses incurred	838	7,213	8,051
Asset Impairments And Write-Downs
Restructuring Costs
Total expenses incurred	$ 788	$ 6,593	$ 7,381