Goodwill and Intangible Assets, Net (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012
Goodwill [Roll Forward]
Balance as of April 1, 2012	$ 96,092
Impairment losses	(700)	[1]
Additions	49,737	[2]
Balance as of July 1, 2012	145,129
Communications [Member]
Goodwill [Roll Forward]
Balance as of April 1, 2012	74,673
Impairment losses	(700)	[1]
Additions	49,737	[2]
Balance as of July 1, 2012	123,710
Computing and Consumer [Member]
Goodwill [Roll Forward]
Balance as of April 1, 2012	21,419
Impairment losses	0
Additions	0	[2]
Balance as of July 1, 2012	$ 21,419

[1] Represents goodwill of the divested Video processing business. See Note 5 for further details.

[2] During the six months ended September 30, 2012, the Company acquired intangibles from Fox Enterprises, Alvand Technologies and NXP B.V.'s data converter business. See Note 4 for further details.