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COMPUTATION OF EARNINGS (LOSS) PER COMMON SHARE (Tables)
 9 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings per Common Share
The following table sets forth the computation of basic and diluted earnings (loss) per common share for the three and nine months ended December 31, 2016 and 2017:
 
 
Three Months Ended December 31,
 
Nine Months Ended 
 December 31,
(in thousands, except per share data)
 
2016
 
2017
 
2016
 
2017
Basic earnings (loss) per common share:
 
 
 
 
 
 
 
 
Numerator:
 
 
 
 
 
 
 
 
Net income (loss)
 
$
22,221

 
$
(49,504
)
 
$
63,082

 
$
(10,723
)
 
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
 
Weighted average common shares, basic
 
32,242

 
32,075

 
32,260

 
32,384

Dilutive effect of employee equity incentive plans
 
584

 
—

 
635

 
—

Weighted average common shares-diluted
 
32,826

 
32,075

 
32,895

 
32,384

 
 
 
 
 
 
 
 
 
Basic earnings (loss) per common share
 
$
0.69

 
$
(1.54
)
 
$
1.96

 
$
(0.33
)
Diluted earnings (loss) per common share
 
$
0.68

 
$
(1.54
)
 
$
1.92

 
$
(0.33
)
 
 
 
 
 
 
 
 
 
Potentially dilutive securities excluded from diluted earnings (loss) per common share because their effect is anti-dilutive
 
473

 
968

 
573

 
1,107