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Retirement Plans (Tables)
 3 Months Ended
Apr. 30, 2020
Retirement Benefits [Abstract]  
Schedule of Defined Benefit Plans Disclosures
The net periodic pension cost for the Pension Plan and the VIP Plan for the three months ended April 30, 2020 and 2019 were as follows:
 
Combined Employee Retirement Plans
 
Three Months Ended
 
4/30/2020
 
4/30/2019
 
(in thousands)
Service cost
$
—

 
$
—

Interest cost
301

 
355

Expected return on plan assets
(224
)
 
(343
)
Plan settlement
—

 
—

Amortization of prior service cost
—

 
—

Recognized net actuarial loss
465

 
176

Benefit cost
$
542

 
$
188