v3.26.1
Intangible assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period $ 159,542  
Amortization of intangible assets 138,824 $ 88,432
Intangible assets other than goodwill at end of period 73,580 159,542
Acquired software technologies    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 36,210  
Intangible assets other than goodwill at end of period 0 36,210
Customer relationships    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 90,622  
Intangible assets other than goodwill at end of period 0 90,622
Capitalized software technologies    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 32,710  
Intangible assets other than goodwill at end of period 73,580 32,710
Gross carrying amount    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 591,342 571,124
Additions 52,862 19,259
Acquired through business combinations   1,493
Exchange differences 3,369 (534)
Intangible assets other than goodwill at end of period 647,573 591,342
Gross carrying amount | Acquired software technologies    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 213,292 212,649
Additions 0 0
Acquired through business combinations   826
Exchange differences 867 (183)
Intangible assets other than goodwill at end of period 214,159 213,292
Gross carrying amount | Customer relationships    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 344,006 343,690
Additions 0 0
Acquired through business combinations   667
Exchange differences 2,502 (351)
Intangible assets other than goodwill at end of period 346,508 344,006
Gross carrying amount | Capitalized software technologies    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period 34,044 14,785
Additions 52,862 19,259
Acquired through business combinations   0
Exchange differences 0 0
Intangible assets other than goodwill at end of period 86,906 34,044
Accumulated depreciation    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (431,800) (344,093)
Exchange differences 3,369 (725)
Amortization of intangible assets 138,824 88,432
Intangible assets other than goodwill at end of period (573,993) (431,800)
Accumulated depreciation | Acquired software technologies    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (177,082) (145,646)
Exchange differences 867 (183)
Amortization of intangible assets 36,210 31,619
Intangible assets other than goodwill at end of period (214,159) (177,082)
Accumulated depreciation | Customer relationships    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (253,384) (198,447)
Exchange differences 2,502 (542)
Amortization of intangible assets 90,622 55,479
Intangible assets other than goodwill at end of period (346,508) (253,384)
Accumulated depreciation | Capitalized software technologies    
Reconciliation of changes in intangible assets other than goodwill [abstract]    
Intangible assets other than goodwill at beginning of period (1,334) 0
Exchange differences 0 0
Amortization of intangible assets 11,992 1,334
Intangible assets other than goodwill at end of period $ (13,326) $ (1,334)