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Segment Information (Tables)
6 Months Ended
Sep. 28, 2014
Segment Reporting [Abstract]  
Summary of Segment Information
(In thousands)
 
Industrial
 
Water
Treatment
 
Total
Three months ended September 28, 2014:
 
 
 
 
 
 
Sales
 
$
57,935

 
$
30,946

 
$
88,881

Gross profit
 
8,363

 
9,759

 
18,122

Selling, general and administrative expenses
 
4,717

 
3,554

 
8,271

Operating income
 
3,646

 
6,205

 
9,851

Three months ended September 29, 2013:
 
 
 
 
 
 
Sales
 
$
56,683

 
$
29,916

 
$
86,599

Gross profit
 
7,282

 
9,288

 
16,570

Selling, general and administrative expenses
 
4,881

 
3,412

 
8,293

Operating income
 
2,401

 
5,876

 
8,277

Six months ended September 28, 2014:
 
 
 
 
 
 
Sales
 
$
125,481

 
$
61,436

 
$
186,917

Gross profit
 
17,724

 
18,894

 
36,618

Selling, general and administrative expenses
 
9,816

 
7,330

 
17,146

Operating income
 
7,908

 
11,564

 
19,472

Six months ended September 29, 2013:
 
 
 
 
 
 
Sales
 
$
123,714

 
$
57,629

 
$
181,343

Gross profit
 
16,504

 
17,297

 
33,801

Selling, general and administrative expenses
 
10,315

 
6,948

 
17,263

Operating income
 
6,189

 
10,349

 
16,538