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Selected Balance Sheet Information (Tables)
 3 Months Ended
Apr. 30, 2016
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, 2016
 
January 31, 2016
 
April 30, 2015
Accounts receivable, net:
 
 
 
 
 
 
     Trade accounts
 
$
42,041

 
$
39,103

 
$
45,686

     Allowance for doubtful accounts
 
(1,028
)
 
(1,034
)
 
(453
)
 
 
$
41,013

 
$
38,069

 
$
45,233

 
 
 
 
 
 
 
Inventories:
 
 
 
 
 
 
Finished goods
 
$
4,570

 
$
4,896

 
$
9,127

In process
 
1,751

 
1,845

 
2,533

Materials
 
40,629

 
39,147

 
47,321

 

$
46,950


$
45,888


$
58,981

 
 
 
 
 
 
 
Other current assets:
 
 
 
 
 
 
Insurance policy benefit
 
$
742

 
$
716

 
$
683

     Federal tax receivable
 
1,719

 
2,176

 
—

Receivable from sale of business
 
205

 
255

 
789

     Prepaid expenses and other
 
2,677

 
1,737

 
4,889

 
 
$
5,343

 
$
4,884

 
$
6,361

 
 
 
 
 
 
 
Property, plant and equipment, net:
 
 
 
 
 
 
Held for use:
 
 
 
 
 
 
Land
 
$
3,054

 
$
3,054

 
$
3,246

Buildings and improvements
 
77,901

 
77,827

 
78,661

Machinery and equipment
 
141,798

 
140,995

 
135,154

     Accumulated depreciation
 
(109,786
)
 
(106,514
)
 
(99,538
)
 
 
$
112,967

 
$
115,362

 
$
117,523

 
 
 
 
 
 
 
Held for sale:
 
 
 
 
 
 
Land
 
$
244

 
$
244

 
$
11

Buildings and improvements
 
1,595

 
1,595

 
1,522

Machinery and equipment
 
329

 
329

 
—

     Accumulated depreciation
 
(1,368
)
 
(1,368
)
 
(627
)
 
 
800

 
800

 
906

 
 
$
113,767

 
$
116,162

 
$
118,429

 
 
 
 
 
 
 
Other assets:
 
 
 
 
 
 
Equity investments
 
$
2,813

 
$
2,805

 
$
3,095

Deferred income taxes
 
25

 
—

 
—

Other
 
1,407

 
1,322

 
1,264

 
 
$
4,245

 
$
4,127

 
$
4,359

 
 
 
 
 
 
 
Accrued liabilities:
 
 
 
 
 
 
Salaries and related
 
$
1,874

 
$
1,883

 
$
3,035

Benefits
 
3,945

 
3,864

 
4,655

Insurance obligations
 
1,893

 
1,730

 
1,629

Warranties
 
2,316

 
1,835

 
2,285

Income taxes
 
654

 
475

 
1,824

Other taxes
 
1,008

 
1,117

 
936

Acquisition-related contingent consideration
 
454

 
407

 
938

Other
 
595

 
731

 
1,433

 
 
$
12,739

 
$
12,042

 
$
16,735

 
 
 
 
 
 
 
Other liabilities:
 
 
 
 
 
 
Postretirement benefits
 
$
7,678

 
$
7,662

 
$
11,976

Acquisition-related contingent consideration
 
2,338

 
2,499

 
3,046

Deferred income taxes
 
4,202

 
5,426

 
7,278

Uncertain tax positions
 
3,041

 
3,339

 
3,281

 
 
$
17,259

 
$
18,926

 
$
25,581