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Stock-Based Compensation (Tables)
 12 Months Ended
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary Of Stock Option Activity The following table summarizes the Company’s stock option activity in the years indicated:
 
 
 
Number of
Options
 
Weighted-
Average
Remaining
Contract
Term (Years)
 
Weighted-
Average
Exercise
Price
 
Aggregate
Intrinsic
Value
Options outstanding as of March 31, 2015
 
102,817

 
7.0
 
$
55.86

 
$
1,291

Granted
 
127,966

 
 
 
68.40

 
—

Exercised
 
(11,986
)
 
 
 
14.64

 
639

Expired
 
(8,500
)
 

 
13.76

 
437

Options outstanding as of March 31, 2016
 
210,297

 
8.5
 
$
67.54

 
$
218

Granted
 
242,068

 
 
 
57.60

 
—

Exercised
 
(263
)
 
 
 
18.25

 
12

Expired
 
(434
)
 
 
 
18.25

 
15

Options outstanding as of March 31, 2017
 
451,668

 
8.4
 
$
62.29

 
$
7,520

Granted
 
169,703

 
 
 
83.14

 
—

Exercised
 
(62,197
)
 
 
 
63.44

 
1,132

Forfeited
 
(11,495
)
 
 
 
70.22

 
75

Expired
 
(2,089
)
 
 
 
18.25

 
137

Options outstanding as of March 31, 2018
 
545,590

 
8.0
 
$
68.65

 
$
2,679

Options exercisable as of March 31, 2018
 
183,347

 
7.2
 
$
65.11

 
$
806

Options vested and expected to vest, as of March 31, 2018
 
537,237

 
8.0
 
$
68.56

 
$
2,644
Summary Of Information Regarding Stock Options Outstanding And Exercisable The following table summarizes information regarding stock options outstanding as of March 31, 2018:
 
 
 
 
Range of Exercise Prices
 
Number of
Options
 
Weighted-
Average
Remaining
Contractual Life (Years)
 
Weighted-
Average
Exercise Price
$55.00-$60.00
 
218,405

 
8.1
 
$
57.60

$65.01-$70.00
 
163,160

 
6.8
 
$
68.86

$80.01-$83.14
 
164,025

 
9.1
 
$
83.14

 
 
545,590

 
8.0
 
$
68.65
Summary Of The Changes In Restricted Stock Units And Market Share Units

A summary of the changes in restricted stock units, performance market share units and market share units awarded to employees and directors that were outstanding under the Company’s equity compensation plans during fiscal 2018 is presented below:

 
 
Restricted Stock Units (RSU)
 
Performance Market Share Units and Market Share Units (MSU)
 
 
Number of
RSU
 
Weighted-
Average
Grant Date
Fair Value
 
Number of
MSU
 
Weighted-
Average
Grant Date
Fair Value
Non-vested awards as of March 31, 2017
 
600,275

 
$
51.96

 
449,141

 
$
65.41

Granted
 
195,982

 
74.78

 
60,187

 
105.74

Stock dividend
 
6,203

 
56.99

 
3,451

 
70.19

Performance factor
 
—

 
—

 
13

 
83.92

Vested
 
(151,458
)
 
60.36

 
(142,426
)
 
70.21

Canceled
 
(17,251
)
 
68.77

 
(20,430
)
 
69.10

Non-vested awards as of March 31, 2018
 
633,751

 
$
56.60

 
349,936

 
$
70.22