| Goodwill Balances | 
The following table presents goodwill balances as of the dates indicated below:  
|  |  
|  |  |  |  |  |  |  |  |  
| (In thousands) | As of September 30, 2013
 |   | As of June 30, 2013
 |  
| Gross goodwill balance | $ | 604,126 | 
 |   | $ | 604,205 | 
 |  
| Accumulated impairment losses | (277,570 | ) |   | (277,570 | ) |  
| Net goodwill balance | $ | 326,556 | 
 |   | $ | 326,635 | 
 |  | 
      
        | Components of Purchased Intangible Assets | 
The components of purchased intangible assets as of the dates indicated below were as follows: 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
| (In thousands) |   |   | As of September 30, 2013
 |   | As of June 30, 2013
 |  
| Category | Range of Useful Lives |   | Gross Carrying Amount |   | Accumulated Amortization and Impairment |   | Net Amount |   | Gross Carrying Amount |   | Accumulated Amortization and Impairment |   | Net Amount |  
| Existing technology | 4-7 years |   | $ | 133,659 | 
 |   | $ | 120,977 | 
 |   | $ | 12,682 | 
 |   | $ | 133,659 | 
 |   | $ | 119,106 | 
 |   | $ | 14,553 | 
 |  
| Patents | 6-13 years |   | 57,648 | 
 |   | 51,904 | 
 |   | 5,744 | 
 |   | 57,648 | 
 |   | 51,068 | 
 |   | 6,580 | 
 |  
| Trade name/Trademark | 4-10 years |   | 19,893 | 
 |   | 16,303 | 
 |   | 3,590 | 
 |   | 19,893 | 
 |   | 15,928 | 
 |   | 3,965 | 
 |  
| Customer relationships | 6-7 years |   | 54,680 | 
 |   | 46,674 | 
 |   | 8,006 | 
 |   | 54,680 | 
 |   | 45,263 | 
 |   | 9,417 | 
 |  
| Other | 0-1 year |   | 16,200 | 
 |   | 16,200 | 
 |   | — | 
 |   | 16,200 | 
 |   | 16,200 | 
 |   | — | 
 |  
| Total |   |   | $ | 282,080 | 
 |   | $ | 252,058 | 
 |   | $ | 30,022 | 
 |   | $ | 282,080 | 
 |   | $ | 247,565 | 
 |   | $ | 34,515 | 
 |  | 
      
        | Remaining Estimated Amortization Expense | 
Based on the intangible assets recorded as of September 30, 2013, and assuming no subsequent additions to, or impairment of, the underlying assets, the remaining estimated amortization expense is expected to be as follows:
 
|  |  
|  |  |  |  |  
| Fiscal year ending June 30: | Amortization (In thousands) |  
| 2014 (remaining 9 months) | $ | 10,875 | 
 |  
| 2015 | 12,752 | 
 |  
| 2016 | 5,564 | 
 |  
| 2017 | 806 | 
 |  
| 2018 | 25 | 
 |  
| Total | $ | 30,022 | 
 |  |