Income Taxes (Details 5) (USD $) In Thousands, unless otherwise specified					12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2014 New York State (NYS) Investment tax credit	Sep. 30, 2013 New York State (NYS) Investment tax credit	Sep. 30, 2012 New York State (NYS) Investment tax credit	Sep. 30, 2014 Foreign	Sep. 30, 2013 Foreign	Sep. 30, 2012 Foreign
Income Taxes
Undistributed international earnings	$ 111,547
Change in the valuation allowance
Beginning balance	(9,543)	(14,116)	(14,867)	(15,404)
NYS investment tax credit carryforwards expired/(generated)					1,269	(321)	(694)
Foreign net operating losses utilized								3,304	1,580	1,231
Foreign net operating losses acquired									(508)
Balance at the end of the period	$ (9,543)	$ (14,116)	$ (14,867)	$ (15,404)