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Segment Reporting (Tables)
 3 Months Ended
Apr. 30, 2013
Segment Reporting [Abstract]  
Business segment net sales and operating income results
Business segment net sales and operating income results are as follows:
 
 
Three Months Ended
 
 
April 30,
2013
 
April 30,
2012
Net sales
 
 
 
 
Applied Technology Division
 
$
51,181

 
$
53,741

Engineered Films Division
 
34,493

 
41,094

Aerostar Division
 
21,715

 
25,635

Intersegment eliminations (a)
 
(3,709
)
 
(2,555
)
Consolidated net sales
 
$
103,680

 
$
117,915

 
 
 
 
 
Operating income
 
 
 
 
Applied Technology Division
 
$
19,157

 
$
22,050

Engineered Films Division
 
4,754

 
9,179

Aerostar Division
 
1,806

 
1,442

Intersegment eliminations (a)
 
(21
)
 
(79
)
Total reportable segment income
 
25,696

 
32,592

Administrative and general expenses
 
(4,762
)
 
(4,160
)
Consolidated operating income
 
$
20,934

 
$
28,432


(a) Intersegment sales were primarily from Aerostar to Applied Technology.