Goodwill and Intangible Assets (Tables)

12 Months Ended

Jan. 31, 2013

Goodwill and Intangible Assets [Abstract]

Other intangible assets

The Company’s amortizing intangible assets were as follows (in thousands):

	As of January 31, 2013
	Gross		Accumulated Amortization			Net
Technology, licenses and patents	$	184,213	$	(179,159	)	$	5,054
Customer relationships		278,900		(240,663	)		38,237
Trademarks		14,300		(12,334	)		1,966
Internal-use software		6,711		(6,307	)		404
Total	$	484,124	$	(438,463	)	$	45,661
	As of January 31, 2012
	Gross		Accumulated Amortization			Net
Technology, licenses and patents	$	178,699	$	(178,699	)	$	—
Customer relationships		278,900		(206,030	)		72,870
Trademarks		14,300		(10,559	)		3,741
Internal-use software		6,649		(5,996	)		653
Total	$	478,548	$	(401,284	)	$	77,264

Summary of Weighted average estimated remaining useful life

Weighted average estimated remaining useful life as of January 31, 2013 is as follows (in years):

	Weighted Average Estimated Remaining Useful Life (In years)
Amortizing intangible assets:
Technology, licenses and patents		2.7
Customer relationships		1.3
Trademarks		1.3
Internal-use software		3

Estimated future amortization expense of purchased intangible assets

The estimated future amortization expense of purchased intangible assets is as follows (in thousands):

For year ending January 31, 2014	$	38,376
For year ending January 31, 2015		5,876
For year ending January 31, 2016		1,409
Total	$	45,661