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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
May 31, 2018
Accounting Policies [Abstract]  
Disaggregation of Revenue [Table Text Block]
Disaggregated Revenue
Revenue by segment and geography is disclosed in Note 5. In addition, the following table presents disaggregated revenue by customer industry (in thousands):
 
 
Three Months Ended May 31,
 
 
2018
 
2017
 
 
 
 
 
Net sales:
 
 
 
 
Industrial - oil and gas, construction, and general
 
$
141,607

 
$
117,011

Transmission and distribution
 
78,671

 
45,162

Power generation
 
41,958

 
43,110

Total net sales
 
$
262,236

 
$
205,283