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Segment Reporting (Tables)
 9 Months Ended
Oct. 31, 2014
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
 
Nine Months Ended
 
October 31,
2014
 
October 31,
2013
 
October 31,
2014
 
October 31,
2013
Net sales
 
 
 
 
 
 
 
Applied Technology Division
$
33,161

 
$
43,797

 
$
115,696

 
$
134,069

Engineered Films Division
41,249

 
40,241

 
125,755

 
111,998

Aerostar Division
19,257

 
24,269

 
56,179

 
66,706

Intersegment eliminations (a)
(2,375
)
 
(3,369
)
 
(9,343
)
 
(10,734
)
Consolidated net sales
$
91,292

 
$
104,938

 
$
288,287

 
$
302,039

 
 
 
 
 
 
 
 
Operating income
 
 
 
 
 
 
 
Applied Technology Division
$
6,447

 
$
15,149

 
$
31,132

 
$
46,176

Engineered Films Division
5,486

 
5,241

 
17,165

 
14,765

Aerostar Division
3,027

 
2,714

 
4,666

 
5,484

Intersegment eliminations (a)
134

 
(23
)
 
114

 
(61
)
Total reportable segment income
15,094

 
23,081

 
53,077

 
66,364

Administrative and general expenses
(4,935
)
 
(4,949
)
 
(15,690
)
 
(14,730
)
Consolidated operating income
$
10,159

 
$
18,132

 
$
37,387

 
$
51,634


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