Stockholders' Equity (Schedule Of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 30, 2012	Sep. 30, 2011
Stockholders' Equity Note [Abstract]
Accumulated foreign currency translation gains, net of tax of ($2,653) at September 30, 2011 and ($[0]) at March 30, 2012	$ 8,239	$ 6,834
Accumulated unrealized gains on available-for-sale securities, net of tax of ($387) at September 30, 2011 and ($[0]) at March 30, 2012	891	699
Total accumulated other comprehensive income	9,130	7,533
Accumulated Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax	(3,026)	(2,653)
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Tax	$ (496)	$ (387)