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Selected Balance Sheet Information (Tables)
 6 Months Ended
Jul. 31, 2015
Selected Balance Sheet Information [Abstract]  
Components of selected balance sheet items
Following are the components of selected items from the Consolidated Balance Sheets:
 
 
July 31, 2015
 
January 31, 2015
 
July 31, 2014
Accounts receivable, net:
 
 
 
 
 
 
     Trade accounts
 
$
40,370

 
$
56,895

 
$
52,797

     Allowance for doubtful accounts
 
(481
)
 
(319
)
 
(344
)
 
 
$
39,889

 
$
56,576

 
$
52,453

 
 
 
 
 
 
 
Inventories:
 
 
 
 
 
 
Finished goods
 
$
6,657

 
$
8,127

 
$
7,098

In process
 
3,957

 
1,317

 
1,694

Materials
 
43,452

 
45,708

 
42,464

 

$
54,066


$
55,152


$
51,256

 
 
 
 
 
 
 
Other current assets:
 
 
 
 
 
 
Insurance policy benefit
 
$
637

 
$
733

 
$
876

     Federal tax receivable
 
—

 
713

 
1,826

Receivable from sale of business
 
830

 
—

 
—

     Prepaid expenses and other
 
2,341

 
1,648

 
3,049

 
 
$
3,808

 
$
3,094

 
$
5,751

 
 
 
 
 
 
 
Property, plant and equipment, net:
 
 
 
 
 
 
Held for use:
 
 
 
 
 
 
Land
 
$
2,921

 
$
3,246

 
$
2,077

Buildings and improvements
 
76,697

 
78,140

 
68,439

Machinery and equipment
 
136,666

 
131,766

 
118,833

     Accumulated depreciation
 
(99,346
)
 
(96,545
)
 
(91,543
)
 
 
$
116,938

 
$
116,607

 
$
97,806

 
 
 
 
 
 
 
Held for sale:
 
 
 
 
 
 
Land
 
$
324

 
$
11

 
$
—

Buildings and improvements
 
2,597

 
1,522

 
—

Machinery and equipment
 
639

 
—

 
—

     Accumulated depreciation
 
(2,207
)
 
(627
)
 
—

 
 
1,353

 
906

 
—

 
 
$
118,291

 
$
117,513

 
$
97,806

 
 
 
 
 
 
 
Other assets, net:
 
 
 
 
 
 
Investment in affiliate
 
$
2,896

 
$
3,217

 
$
3,380

Other, net
 
1,243

 
526

 
478

 
 
$
4,139

 
$
3,743

 
$
3,858

 
 
 
 
 
 
 
Accrued liabilities:
 
 
 
 
 
 
Salaries and related
 
$
2,031

 
$
4,063

 
$
2,115

Benefits
 
4,315

 
5,001

 
5,261

Insurance obligations
 
1,702

 
1,590

 
1,443

Warranties
 
1,752

 
3,120

 
2,617

Income taxes
 
1,108

 
536

 
133

Other taxes
 
1,031

 
1,240

 
983

Acquisition-related contingent consideration
 
1,028

 
1,375

 
919

Other
 
1,082

 
2,262

 
1,805

 
 
$
14,049

 
$
19,187

 
$
15,276

 
 
 
 
 
 
 
Other liabilities:
 
 
 
 
 
 
Postretirement benefits
 
$
12,151

 
$
11,812

 
$
8,166

Acquisition-related contingent consideration
 
3,049

 
3,631

 
3,682

Deferred income taxes
 
5,764

 
7,091

 
2,172

Uncertain tax positions
 
3,280

 
3,259

 
7,118

 
 
$
24,244

 
$
25,793

 
$
21,138