Intangible Assets, Net

6 Months Ended

Jul. 31, 2011

Intangible Assets, Net

Intangible Assets, Net

7. INTANGIBLE ASSETS, NET

Acquired intangible assets as of July 31, 2011 and January 31, 2011 are as follows:

	Useful Life	July  31, 2011		January  31, 2011
		(In thousands)
Gross carrying amount:
Acquired technology	2 to 7 years	$	167,330	$	164,796
Customer relationships	4 to 10 years		237,007		233,995
Trade names	1 to 10 years		13,007		12,952
Non-competition agreements	4 to 10 years		5,809		5,215
Sales backlog	3 years		843		—
Distribution network	10 years		2,440		2,440
			426,436		419,398
Accumulated amortization:
Acquired technology			123,519		110,740
Customer relationships			108,090		95,753
Trade names			13,007		12,577
Non-competition agreements			3,262		2,760
Distribution network			1,230		1,108
			249,108		222,938
Total		$	177,328	$	196,460

Amortization of intangible assets was $12.6 million and $25.3 million for the three and six months ended July 31, 2011, respectively, and $12.2 million and $24.4 million for the three and six months ended July 31, 2010, respectively. There was no impairment of finite-lived intangible assets for the three and six months ended July 31, 2011 and 2010.