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Intangible Assets and Goodwill
 12 Months Ended
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, 2025March 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 technology1.4$46,696 $(44,003)$2,693 $46,454 $(36,823)$9,631 
Customer relationships5.8105,881 (40,670)65,211 105,827 (28,741)77,086 
Trade names and domains2.9630 (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 
202711,865 
202811,131 
202911,053 
2030 and thereafter19,896 
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, 2024266,574 
Acquired goodwill4,269 
Foreign currency translation687 
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.