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Selected Balance Sheet Information (Tables)
 3 Months Ended
Apr. 30, 2015
Selected Balance Sheet Information [Abstract]  
Components of selected balance sheet items
Following are the components of selected items from the Consolidated Balance Sheets:
 
 
April 30, 2015
 
January 31, 2015
 
April 30, 2014
Accounts receivable, net:
 
 
 
 
 
 
     Trade accounts
 
$
45,686

 
$
56,895

 
$
55,574

     Allowance for doubtful accounts
 
(453
)
 
(319
)
 
(319
)
 
 
$
45,233

 
$
56,576

 
$
55,255

 
 
 
 
 
 
 
Inventories:
 
 
 
 
 
 
Finished goods
 
$
9,127

 
$
8,127

 
$
6,995

In process
 
2,533

 
1,317

 
1,822

Materials
 
47,321

 
45,708

 
46,249

 

$
58,981


$
55,152


$
55,066

 
 
 
 
 
 
 
Other current assets:
 
 
 
 
 
 
Insurance policy benefit
 
$
683

 
$
733

 
$
808

     Federal tax receivable
 
—

 
713

 
—

Receivable from sale of business
 
789

 
—

 
—

     Prepaid expenses and other
 
4,889

 
1,648

 
3,307

 
 
$
6,361

 
$
3,094

 
$
4,115

 
 
 
 
 
 
 
Property, plant and equipment, net:
 
 
 
 
 
 
Held for use:
 
 
 
 
 
 
Land
 
$
3,246

 
$
3,246

 
$
2,077

Buildings and improvements
 
78,661

 
78,140

 
66,787

Machinery and equipment
 
135,154

 
131,766

 
115,997

     Accumulated depreciation
 
(99,538
)
 
(96,545
)
 
(88,116
)
 
 
$
117,523

 
$
116,607

 
$
96,745

 
 
 
 
 
 
 
Held for sale:
 
 
 
 
 
 
Land
 
$
11

 
$
11

 
$
—

Buildings and improvements
 
1,522

 
1,522

 
—

     Accumulated depreciation
 
(627
)
 
(627
)
 
—

 
 
906

 
906

 
—

 
 
$
118,429

 
$
117,513

 
$
96,745

 
 
 
 
 
 
 
Other assets, net:
 
 
 
 
 
 
Investment in affiliate
 
$
3,095

 
$
3,217

 
$
3,541

Other, net
 
1,264

 
526

 
211

 
 
$
4,359

 
$
3,743

 
$
3,752

 
 
 
 
 
 
 
Accrued liabilities:
 
 
 
 
 
 
Salaries and related
 
$
3,035

 
$
4,063

 
$
2,517

Benefits
 
4,655

 
5,001

 
5,579

Insurance obligations
 
1,629

 
1,590

 
1,642

Warranties
 
2,285

 
3,120

 
2,654

Income taxes
 
1,824

 
536

 
5,424

Other taxes
 
936

 
1,240

 
1,014

Acquisition-related contingent consideration
 
938

 
1,375

 
628

Other
 
1,433

 
2,262

 
1,193

 
 
$
16,735

 
$
19,187

 
$
20,651

 
 
 
 
 
 
 
Other liabilities:
 
 
 
 
 
 
Postretirement benefits
 
$
11,976

 
$
11,812

 
$
8,068

Acquisition-related contingent consideration
 
3,046

 
3,631

 
2,056

Deferred income taxes
 
7,278

 
7,091

 
2,531

Uncertain tax positions
 
3,281

 
3,259

 
6,744

 
 
$
25,581

 
$
25,793

 
$
19,399