Segment Information (Schedule Of Sales By Geographic Location Based On The Sales Office Location) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Mar. 31, 2012		Dec. 31, 2011	Sep. 24, 2011	Jun. 25, 2011	Mar. 26, 2011		Dec. 25, 2010	Sep. 25, 2010	Jun. 26, 2010	Mar. 31, 2012	Mar. 26, 2011	Mar. 27, 2010
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 110,631	[1]	$ 122,368	$ 101,602	$ 92,242	$ 91,433	[2]	$ 95,625	$ 100,598	$ 81,915	$ 426,843	$ 369,571	$ 220,989
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											50,230	66,701	47,936
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											23,927	27,398	17,156
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											294,143	205,775	103,992
Hong Kong [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											8,671	9,216	5,611
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											15,196	16,902	12,335
South Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											9,781	12,413	10,134
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											10,662	13,073	10,585
Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											13,063	16,012	12,381
Other Non-U.S. Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales											$ 1,170	$ 2,081	$ 859

[1] The $39.5 million tax benefit recorded in the fourth quarter of 2012 favorably impacted net income, as a result of a $37.3 million release in valuation allowance on deferred tax assets.

[2] Net income was favorably impacted by a $117.0 million benefit to tax expense to decrease the valuation allowance on our U.S. deferred tax assets, which was partially offset by reduced gross margins attributable to a charge of approximately $4.2 million due to a production issue with a new audio device that entered high volume production in March 2011.