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Earnings Per Share (Tables)
 9 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share:
 
 
Three Months Ended December 31,
 
Nine Months Ended December 31,
(In thousands, except per share data)
 
2017
 
2016
 
2017
 
2016
Numerator
 
 
 
 
 
 
 
 
Net income
 
$
314,793

 
$
31,641

 
$
379,257

 
$
58,305

 
 
 

 
 

 
 
 
 
Denominator
 
 

 
 

 
 
 
 
Denominator for basic earnings per share — weighted average shares outstanding
 
53,129

 
52,999

 
53,089

 
52,960

Dilutive effect of unvested restricted stock units and options issued to employees and directors
 
414

 
360

 
442

 
379

Denominator for diluted earnings per share
 
53,543

 
53,359

 
53,531

 
53,339

 
 
 

 
 

 
 
 
 
Earnings per Common Share:
 
 

 
 

 
 
 
 
Basic net earnings per share
 
$
5.93

 
$
0.60

 
$
7.14

 
$
1.10

 
 
 

 
 

 
 
 
 
Diluted net earnings per share
 
$
5.88

 
$
0.59

 
$
7.08

 
$
1.09