Goodwill and Intangible Assets, Net (Tables)

6 Months Ended

Sep. 30, 2012

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amounts of goodwill by segment

Goodwill activity for six months ended September 30, 2012 is as follows:

	Reportable Segment
(in thousands)	Communications			Computing and Consumer		Total
Balance as of April 1, 2012	$	74,673		$	21,419	$	96,092
Dispositions (1)	(700		)	—		(700		)
Additions (2)	49,737			—		49,737
Balance as of September 30, 2012	$	123,710		$	21,419	$	145,129

(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.

Summary of intangible assets balances

Intangible asset balances as of September 30, 2012 and April 1, 2012 are summarized as follows:

	September 30, 2012
(in thousands)	Gross Assets		Accumulated Amortization			Net Assets
Purchased intangible assets:
Existing technology	$	240,033	$	(197,245	)	$	42,788
Trademarks	4,411		(1,560		)	2,851
Customer relationships	131,930		(126,339		)	5,591
Other	4,200		(1,082		)	3,118
Total amortizable purchased intangible assets	380,574		(326,226		)	54,348
IPR&D	4,333		—			4,333
Total purchased intangible assets	$	384,907	$	(326,226	)	$	58,681

	April 1, 2012
(in thousands)	Gross Assets		Accumulated Amortization			Net Assets
Purchased intangible assets:
Existing technology	$	223,733	$	(192,105	)	$	31,628
Trademarks	2,911		(1,144		)	1,767
Customer relationships	127,231		(122,511		)	4,720
Total amortizable purchased intangible assets	353,875		(315,760		)	38,115
IPR&D	2,433		—			2,433
Total purchased intangible assets	$	356,308	$	(315,760	)	$	40,548

Estimated remaining future amortization expense

Based on the intangible assets recorded at September 30, 2012, and assuming no subsequent additions to or impairment of the underlying assets, the remaining estimated amortization expense is expected to be as follows (in thousands):

Fiscal Year	Amount
2013 (Remaining 6 months)	$	9,162
2014	16,816
2015	13,086
2016	8,071
2017 and thereafter	7,213
Total	$	54,348