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Income Taxes (Tables)
12 Months Ended
Mar. 31, 2024
Income Tax Disclosure [Abstract]  
Schedule of Income Before Income Taxes
Income from continuing operations before income taxes for fiscal years 2024, 2023 and 2022 is summarized as follows (in thousands):
 Years Ended March 31,
 202420232022
Swiss$502,291 $282,970 $579,258 
Non-Swiss119,305 180,552 196,560 
Income before taxes$621,596 $463,522 $775,818 
Schedule of Provision (Benefit) for Income Taxes
The provision for (benefit from) income taxes is summarized as follows (in thousands):
Years Ended March 31,
202420232022
Current:
Swiss$26,833 $19,405 $59,659 
Non-Swiss25,044 48,829 44,094 
Deferred:
Swiss(47,517)26,629 29,198 
Non-Swiss5,093 4,085 (1,646)
Provision for income taxes$9,453 $98,947 $131,305 
Schedule of Difference Between the Provision (Benefit) for Income Taxes and Expected Tax Provision (Benefit) at the Statutory Income Tax Rate
The difference between the provision for (benefit from) income taxes and the expected tax provision (tax benefit) at the Swiss statutory income tax rate of 8.5% is reconciled below (in thousands):
 Years Ended March 31,
 202420232022
Expected tax provision at statutory income tax rates$52,836 $39,399 $65,945 
Income taxes at different rates47,595 38,467 61,296 
Research and development tax credits(9,738)(152)(5,957)
Swiss Tax Ruling
(50,051)— — 
Executive compensation407 749 4,683 
Stock-based compensation4,019 5,736 (9,141)
Deferred tax effects from TRAF(33,926)— — 
Valuation allowance4,780 908 887 
Impairment— 1,881 — 
Restructuring charges / (credits)— (1,764)— 
Unrecognized tax benefits11,535 13,284 16,577 
Audit settlement— — (3,655)
FDII deduction(18,675)— — 
Other, net671 439 670 
Provision for income taxes$9,453 $98,947 $131,305 
Schedule of Deferred Income Tax Assets and Liabilities
Deferred income tax assets and liabilities consist of the following (in thousands):
 March 31,
 20242023
Deferred tax assets:  
Tax attributes carryforward$43,846 $36,700 
Future tax deduction from Swiss Tax Ruling49,755 — 
Accruals77,181 85,786 
Depreciation and amortization121 707 
Tax step-up of goodwill from TRAF105,942 100,514 
Share-based compensation13,718 11,093 
Gross deferred tax assets290,563 234,800 
Valuation allowance(35,536)(30,766)
Deferred tax assets after valuation allowance255,027 204,034 
Deferred tax liabilities:  
Acquired intangible assets and other(30,901)(34,848)
Deferred tax liabilities(30,901)(34,848)
Deferred tax assets, net$224,126 $169,186 
Schedule of Aggregate Changes in Gross Unrecognized Tax Benefits
The aggregate changes in gross unrecognized tax benefits in fiscal years 2024, 2023 and 2022 were as follows (in thousands).
March 31, 2021$163,253 
Lapse of statute of limitations(4,232)
Settlements with taxing authorities
(2,015)
Increases in balances related to tax positions taken during the year22,366 
March 31, 2022$179,372 
Lapse of statute of limitations(3,586)
Increases in balances related to tax positions taken during the year15,214 
March 31, 2023$191,000 
Lapse of statute of limitations(3,863)
Settlements with taxing authorities41 
Increases in balances related to tax positions taken during prior years
705 
Increases in balances related to tax positions taken during the year22,332 
March 31, 2024$210,215