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PENSION BENEFIT PLANS (Tables)
3 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
Schedule of Net Periodic Pension Costs of Noncontributory Defined Benefit Pension Plans
The following sets forth the components of the Company's net periodic pension cost of the noncontributory defined benefit pension plans for the three months ended June 30, 2018 and 2017 (in thousands):
 
Three Months Ended
 
June 30,
 
2018
 
2017
Service cost
$
63

 
$
197

Interest cost
121

 
381

    Net periodic pension cost
$
184

 
$
578