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Employee Benefit Plans (Tables)
12 Months Ended
Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of share-based compensation expense and related tax benefit recognized
The following table summarizes share-based compensation expense and related tax benefit recognized for fiscal years 2017, 2016 and 2015 (in thousands):
 
 
Years Ended March 31,
 
 
2017
 
2016
 
2015
Cost of goods sold
 
$
2,663

 
$
2,340

 
$
2,474

Marketing and selling
 
14,723

 
9,273

 
8,570

Research and development
 
4,200

 
3,046

 
2,381

General and administrative
 
14,304

 
12,353

 
10,766

Restructuring
 

 
7

 

Total share-based compensation expense
 
35,890

 
27,019

 
24,191

Income tax benefit
 
(8,536
)
 
(6,297
)
 
(4,814
)
Total share-based compensation expense, net of income tax
 
$
27,354

 
$
20,722

 
$
19,377

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 months 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, 2017
 
 
Unamortized
Expense
 
Remaining
Months
ESPP
 
$
1,191

 
4
Time-based RSUs
 
36,172

 
21
Market-based and performance-based RSUs
 
9,241

 
17
 
 
$
46,604

 
 
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 are determined with the following assumptions and values:
 Employee Stock Purchase Plans
 
Years Ended March 31,
 
 
2017
 
2016
 
2015
Dividend yield
 
2.50
%
 
3.47
%
 
1.97
%
Risk-free interest rate
 
0.51
%
 
0.29
%
 
0.14
%
Expected volatility
 
35
%
 
26
%
 
30
%
Expected life (years)
 
0.5

 
0.5

 
0.6

Weighted average fair value
 
$
5.73

 
$
3.29

 
$
3.18

Market-based RSUs
 
Years Ended March 31,
 
 
2017
 
2016
 
2015
Dividend yield
 
3.29
%
 
3.78
%
 
1.86
%
Risk-free interest rate
 
0.86
%
 
0.84
%
 
0.83
%
Expected volatility
 
34
%
 
38
%
 
46
%
Expected life (years)
 
3.0

 
3.0

 
3.0

Summary of stock option activity
A summary of the Company's stock option activities under all stock plans for fiscal years 2017, 2016 and 2015 is as follows (including discontinued operations for fiscal year 2015 and 2016):
 
 
Number of Shares
 
Weighted-Average Exercise Price
 
Weighted-Average Remaining Contractual Term

 
Aggregate Intrinsic Value
 
 
(In thousands)
 
 
 
(Years)
 
(In thousands)
Outstanding, March 31, 2014
 
9,816

 


 
 
 
 
Granted
 

 


 
 
 
 
Exercised
 
(390
)
 


 
 
 
$
1,505

Cancelled or expired
 
(1,550
)
 


 
 
 
 
Outstanding, March 31, 2015
 
7,876

 


 
 
 
 
Granted
 

 


 
 
 
 
Exercised
 
(746
)
 


 
 
 
$
4,026

Cancelled or expired
 
(1,796
)
 


 
 
 
 
Outstanding, March 31, 2016
 
5,334

 
$
18

 

 


Granted
 

 
$

 

 


Exercised
 
(1,784
)
 
$
16

 

 
$
14,627

Cancelled or expired
 
(500
)
 
$
23

 

 


Outstanding, March 31, 2017
 
3,050

 
$
18

 
3.6
 
$
41,853

Vested and expected to vest, March 31, 2017
 
3,050

 
$
18

 
3.6
 
$
41,853

Vested and exercisable, March 31, 2017
 
3,050

 
$
18

 
3.6
 
$
41,853

Summary of time- and performance-based RSU activity
A summary of the Company's time-based, market-based, and performance-based RSU activities for fiscal years 2017, 2016 and 2015 is as follows (including discontinued operations for all the periods presented):
 
 
Number of Shares
 
Weighted-Average Grant Date Fair Value
 
Weighted-Average Remaining Vesting Period
 
Aggregate
Fair Value
 
 
(In thousands)
 
 
 
(Years)
 
(In thousands)
Outstanding, March 31, 2014
 
6,088

 
$
10

 
 
 
 
Granted—time-based
 
1,332

 
$
13

 
 
 
 
Granted—market-based
 
523

 
$
13

 
 
 
 
Granted - performance-based
 
55

 
$
12

 
 
 
 
Vested
 
(1,949
)
 
$
10

 
 
 
$
27,844

Cancelled or expired
 
(1,110
)
 
$
11

 
 
 
 
Outstanding, March 31, 2015
 
4,939

 
$
11

 
 
 
 
Granted—time-based
 
2,247

 
$
13

 
 
 
 
Granted—market-based
 
356

 
$
14

 
 
 
 
Granted - performance-based
 
356

 
$
13

 
 
 
 
Vested
 
(1,557
)
 
$
10

 
 
 
$
22,823

Cancelled or expired
 
(820
)
 
$
12

 
 
 
 
Outstanding, March 31, 2016
 
5,521

 
$
11

 
 
 
 
Granted—time-based
 
2,390

 
$
16

 
 
 
 
Granted—market-based
 
160

 
$
15

 
 
 
 
Granted - performance-based
 
604

 
$
15

 
 
 
 
Vested
 
(2,126
)
 
$
11

 
 
 
$
48,644

Cancelled or expired
 
(368
)
 
$
14

 
 
 
 
Outstanding, March 31, 2017
 
6,181

 
$
14

 
1.2
 
$
196,983

Expected to vest, March 31, 2017
 
4,859

 
$
14

 
1.2
 
$
154,846

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 2017, 2016 and 2015 was as follows (in thousands):
 
 
Years Ended March 31,
 
 
2017
 
2016
 
2015
Service costs
 
$
10,385

 
$
10,117

 
$
7,646

Interest costs
 
800

 
1,147

 
1,970

Expected return on plan assets
 
(1,724
)
 
(1,657
)
 
(2,084
)
Amortization:
 
 
 
 
 
 
    Net transition obligation
 
4

 
4

 
4

Net prior service costs (credit) recognized
 
(117
)
 
(124
)
 
(45
)
Net actuarial loss recognized
 
1,032

 
1,854

 
301

Settlement and curtailment
 

 

 
(13
)
 
 
$
10,380

 
$
11,341

 
$
7,779

Schedule of changes in projected benefit obligations
The changes in projected benefit obligations for fiscal years 2017 and 2016 were as follows (in thousands):
 
 
Years Ended March 31,
 
 
2017
 
2016
Projected benefit obligations, beginning of the year
 
$
120,473

 
$
113,323

Service costs
 
10,385

 
10,117

Interest costs
 
800

 
1,147

Plan participant contributions
 
3,020

 
2,990

Actuarial (gains) losses
 
(11,081
)
 
(2,496
)
Benefits paid
 
(5,214
)
 
(5,277
)
Plan amendment related to statutory change
 
65

 

Administrative expense paid
 
(132
)
 

Currency exchange rate changes
 
(3,676
)
 
669

Projected benefit obligations, end of the year
 
$
114,640

 
$
120,473

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 2017 and 2016 (in thousands):
 
 
Years Ended March 31,
 
 
2017
 
2016
Fair value of plan assets, beginning of the year
 
$
65,279

 
$
60,910

Actual return on plan assets
 
4,733

 
(1,160
)
Employer contributions
 
5,865

 
7,171

Plan participant contributions
 
3,020

 
2,990

Benefits paid
 
(5,214
)
 
(5,277
)
Administrative expenses paid
 
(132
)
 

Currency exchange rate changes
 
(2,175
)
 
645

Fair value of plan assets, end of the year
 
$
71,376

 
$
65,279

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, 2017 and 2016 (in thousands):
 
 
March 31,
 
 
2017
 
2016
 
 
Level 1
 
Level 2
 
Total
 
Level 1
 
Level 2
 
Total
Cash and cash equivalents
 
$
11,864

 
$
46

 
$
11,910

 
$
9,268

 
$
47

 
$
9,315

Equity securities
 
20,985

 

 
20,985

 
18,640

 

 
18,640

Debt securities
 
22,373

 

 
22,373

 
21,781

 

 
21,781

Swiss real estate funds
 
9,699

 

 
9,699

 
9,622

 

 
9,622

Hedge funds
 

 
3,507

 
3,507

 

 
3,492

 
3,492

Insurance contracts
 

 
61

 
61

 

 
94

 
94

Other
 
2,654

 
187

 
2,841

 
2,195

 
140

 
2,335

 
 
$
67,575

 
$
3,801

 
$
71,376

 
$
61,506

 
$
3,773

 
$
65,279

Schedule of net funded status
The funded status of the plans was as follows (in thousands):
 
 
Years Ended March 31,
 
 
2017
 
2016
Fair value of plan assets
 
$
71,376

 
$
65,279

Less: projected benefit obligations
 
114,640

 
120,473

Under funded status 
 
$
(43,264
)
 
$
(55,194
)
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,
 
 
2017
 
2016
Current liabilities
 
$
(1,266
)
 
$
(1,285
)
Non-current liabilities
 
(41,998
)
 
(53,909
)
Net liabilities
 
$
(43,264
)
 
$
(55,194
)
Schedule of amounts recognized in other comprehensive income (loss)
Amounts recognized in accumulated other comprehensive loss related to defined benefit pension plans were as follows (in thousands):
 
 
March 31,
 
 
2017
 
2016
 
2015
Net prior service credits
 
$
1,274

 
$
1,613

 
$
1,672

Net actuarial loss
 
(11,407
)
 
(27,612
)
 
(28,751
)
Net transition obligation
 

 
(4
)
 
(8
)
Accumulated other comprehensive loss
 
(10,133
)
 
(26,003
)
 
(27,087
)
Deferred tax benefit
 
(347
)
 
(168
)
 
123

Accumulated other comprehensive loss, net of tax
 
$
(10,480
)
 
$
(26,171
)
 
$
(26,964
)
Schedule of amounts in accumulated other comprehensive income (loss) to be recognized over next fiscal year
The following table presents the amounts included in accumulated other comprehensive loss as of March 31, 2017, which are expected to be recognized as a component of net periodic benefit cost in fiscal year 2018 (in thousands):
 
 
Year Ending
March 31, 2018
Amortization of net prior service credits
 
$
(107
)
Amortization of net actuarial loss
 
306

 
 
$
199

Schedule of actuarial assumptions for the pension plans
The Company reassesses its benefit plan assumptions on a regular basis. The actuarial assumptions for the defined benefit plans for fiscal years 2017 and 2016 were as follows:
 
 
Years Ended March 31,
 
 
2017
 
2016
Benefit Obligations:
 
 
 
 
Discount rate
 
0.75%-7.00%
 
0.5%-8.00%
Estimated rate of compensation increase
 
2.5%-10.00%
 
2.50%-10.00%
Periodic Costs:
 
 
 
 
Discount rate
 
0.5%-8.00%
 
0.75%-7.75%
Estimated rate of compensation increase
 
2.5%-10.00%
 
0.0%-8.00%
Expected average rate of return on plan assets
 
1.0%-2.75%
 
1.00%-2.75%
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,
 
 
2018
 
$
5,006

2019
 
5,408

2020
 
5,720

2021
 
5,291

2022
 
5,595

2023-2027
 
30,614

 
 
$
57,634