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EMPLOYEE BENEFIT PLANS (Tables)
 9 Months Ended
Dec. 31, 2016
Employee Benefits and Share-based Compensation [Abstract]  
Schedule of components of net periodic pension cost
The following table provides a detail of the components of net periodic pension cost (in thousands):
 
 
Three Months Ended 
 December 31,
 
Nine Months Ended 
 December 31,
 
 
2016
 
2015
 
2016
 
2015
Service cost for benefits earned during the period
 
$
1,696

 
$
2,349

 
$
5,450

 
$
7,121

Interest cost on pension benefit obligation
 
4,139

 
5,119

 
13,297

 
15,515

Expected return on assets
 
(5,601
)
 
(6,871
)
 
(17,992
)
 
(20,826
)
Amortization of unrecognized losses
 
1,699

 
2,110

 
5,454

 
6,395

Net periodic pension cost
 
$
1,933

 
$
2,707

 
$
6,209

 
$
8,205
Schedule of Black Scholes assumptions
The following table shows the assumptions used to compute the stock-based compensation expense for stock options granted during the nine months ended December 31, 2016:
 
Risk free interest rate
1.07
%
 
 
Expected life (years)
5

 
 
Volatility
46.75
%
 
 
Dividend yield
2.74
%
 
 
Weighted average exercise price of options granted
$16.21 per option

 
 
Weighted average grant-date fair value of options granted
$2.16 per option