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Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended			1 Months Ended
	Apr. 30, 2010 building	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Oct. 31, 2006 333 Elliott West [Member] sqft
Commitments And Contingencies [Line Items]
Office space occupied under lease agreement					137,000
Number of buildings in the amended and restated lease	3
Lease expiration date		Dec. 31, 2022
Rent expense under non-cancelable operating leases		$ 28.6	$ 26.5	$ 21.6
Contract manufacturers' purchase obligations		$ 24.3

Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

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