Income Taxes (Reconciliation Of Effective Income Tax Rate) (Details)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]
Statutory rate	35.00%	35.00%	35.00%
State and local taxes, net of federal income taxes	(1.00%)	(5.50%)	0.90%
Research and development tax credits	7.50%	11.80%	23.00%
Reserves for uncertainty in income taxes	(1.80%)	(6.10%)	(3.80%)
Foreign rate differentials	(62.30%)	(151.70%)	3.20%
Change in valuation allowance	1.80%	(16.50%)	(3.00%)
Nondeductible expense	(7.50%)	(3.60%)	(18.00%)
Acquisition-related contingent consideration	17.30%	57.70%	(56.60%)
Other	(2.10%)	4.70%	(6.60%)
Effective tax rate	(13.10%)	(74.20%)	(25.90%)