Intangible Assets

6 Months Ended

Jan. 31, 2012

Intangible Assets [Abstract]

Intangible Assets

(18)Intangible Assets

Intangible assets with finite lives as of January 31, 2012 and July 31, 2011 are as follows:

	January 31, 2012
	Weighted Average Amortization Period	Gross Carrying Amount	Accumulated Amortization	Net Carrying Amount
Technologies	11.7	$     47,694,000	28,724,000	$   18,970,000
Customer relationships	10.0	29,931,000	10,757,000	19,174,000
Trademarks and other	19.8	6,044,000	2,129,000	3,915,000
Total		$     83,669,000	41,610,000	$   42,059,000

	July 31, 2011
	Weighted Average Amortization Period	Gross Carrying Amount	Accumulated Amortization	Net Carrying Amount
Technologies	10.2	$     47,694,000	27,000,000	$   20,694,000
Customer relationships	10.0	29,931,000	9,281,000	20,650,000
Trademarks and other	18.6	6,044,000	1,918,000	4,126,000
Total		$     83,669,000	38,199,000	$     45,470,000

In October 2010, we acquired the WAN optimization technology assets and assumed certain liabilities of Stampede Technologies, Inc. ("Stampede") for a purchase price of approximately $5,303,000 (including $3,803,000 which represents the acquisition date fair value of contingent earn-out payments payable over a three year period ending October 1, 2013). As of January 31, 2012, we paid $1,680,000 of the total purchase price in cash, including $180,000 related to the contingent earn-out liability. Of the remaining contingent earn-out liability, $3,185,000 is included in other long-term liabilities and $1,070,000 is included in accrued expenses and other current liabilities in our Condensed Consolidated Balance Sheet as of January 31, 2012. Interest accreted on the contingent earn-out liability for the three months ended January 31, 2012 and 2011 was $119,000 and $115,000, respectively. Interest accreted on the contingent earn-out liability for the six months ended January 31, 2012 and 2011 was $241,000 and $153,000, respectively, and total interest accreted through January 31, 2012 was $632,000. Almost all of the purchase price for Stampede was allocated to the estimated fair value of technologies acquired and was assigned an estimated amortizable life of five years.

Amortization expense for the three months ended January 31, 2012 and 2011 was $1,692,000 and $2,004,000 respectively. Amortization expense for the six months ended January 31, 2012 and 2011 was $3,411,000 and $3,891,000, respectively. The estimated amortization expense related to intangible assets with finite lives for the fiscal years ending July 31, 2012, 2013, 2014, 2015 and 2016 is $6,637,000, $6,327,000, $6,285,000, $6,211,000 and $4,962,000, respectively.