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Employee Benefit Plans (Tables)
12 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Summary of share-based compensation expense and related tax benefit recognized
The following table summarizes share-based compensation expense and total income tax benefit recognized for fiscal years 2022, 2021 and 2020 (in thousands):
 Years Ended March 31,
 202220212020
Cost of goods sold$6,695 $6,438 $4,852 
Marketing and selling 37,796 36,788 26,835 
Research and development18,356 14,179 9,273 
General and administrative30,632 28,614 13,910 
Total share-based compensation expense93,479 86,019 54,870 
Income tax benefit(26,987)(19,472)(14,109)
Total share-based compensation expense, net of income tax benefit$66,492 $66,547 $40,761 
Summary of unamortized share-based compensation expense and the remaining months over which such expense is expected to be recognized
The following table summarizes total unamortized share-based compensation expense and the remaining period over which such expense is expected to be recognized, on a weighted-average basis by type of grant (in thousands, except number of months):
 March 31, 2022
 Unamortized
Expense
Remaining
Months
ESPP$2,341 4
Stock Options19,746 35
Time-based RSUs109,637 24
Market-based and performance-based RSUs36,669 21
Total unamortized share-based compensation expense$168,393 
Schedule of assumptions applied for the fair value of market-based RSUs using the Monte-Carlo simulation method
The grant date fair value of the awards using the Black-Scholes-Merton option-pricing valuation model and Monte-Carlo simulation method is determined with the following assumptions and values:
Stock Options Employee Stock Purchase Plans
Years Ended March 31,Years Ended March 31,
 202220212020202220212020
Dividend yield1.18 %**1.03 %1.04 %1.74 %
Risk-free interest rate1.99 %**0.27 %0.10 %1.81 %
Expected volatility34 %**35 %47 %24 %
Expected life (years)6.2**0.50.50.5
Weighted average grant date fair value per share$25.88**$23.55$24.67$9.35
* Not applicable as no stock options were granted for fiscal year 2021 and 2020.
RSUs with Market ConditionsYears Ended March 31,
 202220212020
Dividend yield0.78 %1.24 %1.76 %
Risk-free interest rate0.31 %0.21 %2.11 %
Expected volatility37 %31 %30 %
Expected life (years)3.03.03.0
Summary of stock option activity
A summary of the Company's stock option activities under all stock plans for fiscal years 2022, 2021 and 2020 is as follows:
 Number of SharesWeighted-Average Exercise PriceWeighted-Average Remaining Contractual Term
Aggregate Intrinsic Value
(In thousands)(Years)(In thousands)
Outstanding, March 31, 20192,607 
Exercised(573)$19,339 
Canceled or expired(65)
Outstanding, March 31, 20201,969 
Exercised(1,347)$68,596 
Outstanding, March 31, 2021622 $34 7.1$43,625 
Granted842 $80 
Exercised(71)$39 $5,573 
Outstanding, March 31, 20221,393 $62 8.3$21,830 
Vested and exercisable, March 31, 2022551 $34 6.0$22,006 
Summary of time, market and performance-based RSU activity
A summary of the Company's time-based, market-based and performance-based RSU activities for fiscal years 2022, 2021 and 2020 is as follows:
 Number of SharesWeighted-Average Grant Date Fair ValueWeighted-Average Remaining Vesting PeriodAggregate
Fair Value
(In thousands)(Years)(In thousands)
Outstanding, March 31, 20194,421 $29 
Granted—time-based1,431 $38 
Granted—market and performance-based365 $40 
Vested(1,705)$76,389 
Canceled or expired(561)
Outstanding, March 31, 20203,951 $36 
Granted—time-based1,046 $60 
Granted—market and performance-based303 $67 
Vested(1,444)$168,816 
Canceled or expired(213)
Outstanding, March 31, 20213,643 $45 
Granted—time-based868 $103 
Granted—market and performance-based203 $124 
Vested(1,463)$40 $133,977 
Canceled or expired(205)$62 
Outstanding, March 31, 20223,046 $68 1.2$233,797 
Schedule of net periodic benefit costs
The net periodic benefit cost of the defined benefit pension plans and the non-retirement post-employment benefit obligations for fiscal years 2022, 2021 and 2020 was as follows (in thousands):
 Years Ended March 31,
 202220212020
Service costs$14,693 $12,121 $11,008 
Interest costs920 1,047 1,055 
Expected return on plan assets(2,930)(2,535)(2,616)
Amortization:
Net prior service credit recognized(465)(467)(435)
Net actuarial loss (gain) recognized(2,158)2,144 1,386 
Settlement— — (97)
Total net periodic benefit cost$10,060 $12,310 $10,301 
Schedule of changes in projected benefit obligations
The changes in projected benefit obligations for fiscal years 2022 and 2021 were as follows (in thousands):
 Years Ended March 31,
 20222021
Projected benefit obligations, beginning of the year$202,348 $160,914 
Service costs14,693 12,121 
Interest costs920 1,047 
Plan participant contributions6,092 4,733 
Actuarial (gains) losses (31,198)15,762 
Benefits paid (3,904)(3,947)
Transfer of prior vested benefits14,963 7,556 
Administrative expense paid(130)(130)
Currency exchange rate changes and other3,767 4,292 
Projected benefit obligations, end of the year$207,551 $202,348 
Schedule of changes in the fair value of defined benefit pension plan assets
The following table presents the changes in the fair value of defined benefit pension plan assets for fiscal years 2022 and 2021 (in thousands):
 Years Ended March 31,
 20222021
Fair value of plan assets, beginning of the year$128,061 $98,010 
Actual return on plan assets(2,156)11,706 
Employer contributions10,877 8,064 
Plan participant contributions6,092 4,733 
Benefits paid
(3,904)(3,947)
Transfer of prior vested benefits14,963 7,556 
Administrative expenses paid(130)(130)
Currency exchange rate changes2,315 2,069 
Fair value of plan assets, end of the year$156,118 $128,061 
Schedule of fair value of the defined benefit pension plan assets by major categories and by levels within the fair value hierarchy
The following tables present the fair value of the defined benefit pension plan assets by major categories and by levels within the fair value hierarchy as of March 31, 2022 and 2021 (in thousands):
 March 31,
 20222021
 Level 1Level 2TotalLevel 1Level 2Total
Cash and cash equivalents$16,317 $— $16,317 $21,715 $— $21,715 
Equity securities48,591 — 48,591 38,437 — 38,437 
Debt securities38,513 — 38,513 31,034 — 31,034 
Real estate funds25,146 13,077 38,223 20,802 8,341 29,143 
Hedge funds— 8,076 8,076 — 2,730 2,730 
Other6,034 364 6,398 4,704 298 5,002 
  Total fair value of plan assets$134,601 $21,517 $156,118 $116,692 $11,369 $128,061 
Schedule of net funded status
The funded status of the plans was as follows (in thousands):
 Years Ended March 31,
 20222021
Fair value of plan assets$156,118 $128,061 
Less: projected benefit obligations207,551 202,348 
Underfunded status $(51,433)$(74,287)
Schedule of amounts recognized on the balance sheet for the plans
Amounts recognized on the balance sheet for the plans were as follows (in thousands):
 March 31,
 20222021
Current liabilities$1,677 $2,738 
Non-current liabilities49,756 71,549 
  Total liabilities$51,433 $74,287 
Schedule of amounts recognized in accumulated other comprehensive loss
Amounts recognized in accumulated other comprehensive loss related to defined benefit pension plans were as follows (in thousands):
 March 31,
 202220212020
Net prior service credits$2,883 $3,263 $3,647 
Net actuarial loss(4,304)(27,553)(22,722)
  Accumulated other comprehensive loss(1,421)(24,290)(19,075)
Deferred taxes(2,074)1,090 (941)
  Accumulated other comprehensive loss, net of tax$(3,495)$(23,200)$(20,016)
Schedule of actuarial assumptions for the pension plans
The actuarial assumptions for the defined benefit plans were as follows:
 Years Ended March 31,
 20222021
Benefit Obligations:
Discount rate
1.00% - 6.75%
0.25% - 6.00%
Estimated rate of compensation increase
2.00% - 10.00%
2.00% - 10.00%
Cash balance interest credit rate
0.00% - 1.75%
0.00% - 1.75%
Years Ended March 31,
202220212020
Periodic Costs:
Discount rate
0.25% - 6.00%
0.50% - 6.75%
0.55% - 7.25%
Estimated rate of compensation increase
2.00% - 10.00%
2.25% - 10.00%
2.50% - 10.00%
Expected average rate of return on plan assets
1.00% - 2.25%
1.00% - 2.50%
0.89% - 3.00%
Cash balance interest credit rate
0.00% - 1.75%
0.00% - 1.75%
1.75% - 2.00%
Schedule of expected benefit payments
The following table reflects the benefit payments that the Company expects the plans to pay in the periods noted (in thousands):
Years Ending March 31,
2023$12,387 
202412,700 
202513,600 
202612,546 
202714,362 
Thereafter67,605 
Total expected benefit payments by the plan$133,200