Commitments And Contingencies (Narrative) (Details) (USD $)	1 Months Ended		3 Months Ended								12 Months Ended			1 Months Ended
	Aug. 31, 2013	Apr. 30, 2010 building	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Oct. 31, 2006 333 Elliott West [Member] sqft
Commitments And Contingencies [Line Items]
Number of buildings in the amended and restated lease		3
Expiration date											Dec. 31, 2022
Office space occupied under lease agreement														137,000
Rent expense under non-cancelable operating leases											$ 26,500,000	$ 21,600,000	$ 19,000,000
Loss on facility sublease	2,393,000		2,393,000	0	0	0	0	0	0	0	2,393,000	0	0
Contract manufacturers' purchase obligations			$ 16,400,000								$ 16,400,000