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Business and Basis of Presentation (Tables)
 12 Months Ended
Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Property, Plant and Equipment
Property, plant and equipment are stated at cost and are depreciated using the straight-line method based on the following estimated useful lives:
 
Years
Building
15 - 40
Machinery
3 - 15
Computer equipment and software
3 - 5
Furniture and fixtures
7 - 10
Leasehold improvements
*

*Leasehold improvements are amortized over the lesser of the lease term or the estimated useful life of the related asset.
Property, plant and equipment, net consist of the following:
 
March 31,
(In thousands)
2018
 
2017
Components of Property, Plant and Equipment
 
 
 
Land
$
550

 
$
550

Building
13,746

 
13,156

Machinery
38,599

 
31,456

Computer equipment
18,116

 
15,440

Furniture and fixtures
2,924

 
2,720

Leasehold improvements
8,804

 
7,497

 
82,739

 
70,819

Accumulated depreciation
(30,187
)
 
(20,224
)
Property, plant and equipment, net
$
52,552

 
$
50,595
Computation of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share:
 
Year Ended March 31,
 (In thousands, except per share data)
2018
 
2017
 
2016
Numerator
 
 
 
 
 
Net income
$
339,570

 
$
69,395

 
$
99,907

 
 
 
 
 
 
Denominator
 
 
 

 
 

Denominator for basic earnings per share - weighted average shares outstanding
53,099

 
52,976

 
52,754

Dilutive effect of unvested restricted stock units and options issued to employees and directors
427

 
386

 
389

Denominator for diluted earnings per share
53,526

 
53,362

 
53,143

 
 
 
 
 
 
Earnings per Common Share:
 
 
 

 
 

Basic net earnings per share
$
6.40

 
$
1.31

 
$
1.89

 
 
 
 
 
 
Diluted net earnings per share
$
6.34

 
$
1.30

 
$
1.88