Intangible Assets, Net (Tables)

9 Months Ended

Oct. 31, 2012

Finite-Lived Intangible Assets [Abstract]

Acquired Intangible Assets

Intangible assets, net as of October 31, 2012 and January 31, 2012 were as follows:

	Useful Life	October 31, 2012		January 31, 2012
		(In thousands)
Gross carrying amount:
Intangible assets with finite lives:
Acquired technology	2 to 7 years	$	93,802	$	94,027
Customer relationships	4 to 10 years	225,941		225,554
Trade names	3 to 5 years	12,783		12,824
Non-competition agreements	3 to 10 years	5,776		5,779
Distribution network	10 years	2,440		2,440
Backlog	3 years	843		843
Total intangible assets with finite lives		341,585		341,467
In-process research and development with indefinite lives		2,500		2,500
		344,085		343,967
Accumulated amortization:
Acquired technology		60,947		49,732
Customer relationships		112,614		95,173
Trade names		10,395		9,805
Non-competition agreements		4,279		3,656
Distribution network		1,535		1,352
Backlog		62		19
		189,832		159,737
Total		$	154,253	$	184,230

Schedule of Estimated Future Amortization Expense

Estimated future amortization expense on finite-lived acquisition-related intangible assets for the remainder of the fiscal year and the four succeeding fiscal years and thereafter is as follows:

Fiscal Years Ending January 31,	(In thousands)
2013 (remainder of fiscal year)	$	9,915
2014	34,510
2015	30,959
2016	29,568
2017	26,835
2018 and thereafter	19,966
	$	151,753