Restructuring (U.S. Restructuring) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended					12 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ (1,000)	$ (100)	$ (236)	$ 200	$ 100	$ 1,259	$ 154	$ (468)
United States Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees eliminated						30
Beginning Balance			0			0
Restructuring charge						963
Payments						(842)
Ending Balance						121
United States Restructuring [Member] | Employee Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0			0
Restructuring charge						568
Payments						(555)
Ending Balance						13
United States Restructuring [Member] | Other [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance			0			0
Restructuring charge						395
Payments						(287)
Ending Balance						$ 108