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Intangible Assets and Goodwill | 12 Months Ended
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Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets and Goodwill | Intangible Assets and Goodwill The carrying value of intangible assets consisted of the following:
| March 31, 2025 |  | March 31, 2024
| Weighted Average Remaining Useful Life (in years) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Developed technology | 1.4 |  | $ | 46,696 |  |  | $ | (44,003) |  |  | $ | 2,693 |  |  | $ | 46,454 |  |  | $ | (36,823) |  |  | $ | 9,631 |
Customer relationships | 5.8 |  | 105,881 |  |  | (40,670) |  |  | 65,211 |  |  | 105,827 |  |  | (28,741) |  |  | 77,086 |
Trade names and domains | 2.9 |  | 630 |  |  | (585) |  |  | 45 |  |  | 584 |  |  | (584) |  |  | — |
Total acquired identifiable intangible assets |  |  | $ | 153,207 |  |  | $ | (85,258) |  |  | $ | 67,949 |  |  | $ | 152,865 |  |  | $ | (66,148) |  |  | $ | 86,717 |
Amortization expense for related intangible assets were $19.1 million, $20.4 million, and $21.1 million for the years ended March 31, 2025, 2024, and 2023, respectively. There were no write-offs during the year ended March 31, 2025, and 2024. During the fourth quarter of fiscal 2025, the Company acquired $0.3 million of developed technology, customer relationships, and tradenames with estimated useful lives from 3 to 6 years. See Note 1, The Company and Significant Accounting Policies, for further information. At March 31, 2025, annual amortization of intangible assets, based upon existing intangible assets and current useful lives, is estimated to be the following (in thousands):
2026 | $ | 14,004 |
2027 | 11,865 |
2028 | 11,131 |
2029 | 11,053 |
2030 and thereafter | 19,896 |
Total | $ | 67,949 |
The following table provides a summary of the changes in the carrying amounts of goodwill (in thousands):
Balance at March 31, 2023 | $ | 266,863 |
Foreign currency translation | (289) |
Balance at March 31, 2024 | 266,574 |
Acquired goodwill | 4,269 |
Foreign currency translation | 687 |
Balance at March 31, 2025 | $ | 271,530 |
The Company conducted its annual impairment tests of goodwill in the fourth quarter of fiscal 2025, 2024, and 2023, and determined that no adjustment to the carrying value of goodwill was required. During the fourth quarter of fiscal 2025, the Company recognized $4.3 million of additional goodwill due to the telecommunications acquisition. See Note 1, The Company and Significant Accounting Policies, for further information.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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