Charges and Credits (Tables)
 3 Months Ended
Apr. 30, 2018
Charges and Credits [Abstract]  
Schedule of Charges and Credits
Charges and credits consisted of the following:
 
Three Months Ended 
 April 30,
(in thousands)
2018
 
2017
Facility closure costs
$
—

 
$
1,227

 
$
—

 
$
1,227