Income Taxes (Details 5) (USD $) In Thousands, unless otherwise specified				12 Months Ended						12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2012 New York State (NYS) Investment tax credit	Sep. 30, 2011 New York State (NYS) Investment tax credit	Sep. 30, 2012 Foreign	Sep. 30, 2011 Foreign	Sep. 30, 2010 Predecessor	Sep. 30, 2009 Predecessor	Sep. 30, 2010 Predecessor New York State (NYS) Investment tax credit	Sep. 30, 2010 Predecessor Foreign
Income Taxes
Undistributed international earnings	$ 108,249
Change in the valuation allowance
Beginning balance	(14,867)	(15,404)	(14,618)					(14,618)	(13,063)
NYS investment tax credit carryforwards (generated)/ utilized				(694)	319					342
Foreign net operating losses utilized (generated) Net						1,231	(1,105)				(1,897)
Balance at the end of the period	$ (14,867)	$ (15,404)	$ (14,618)					$ (14,618)	$ (13,063)