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Acquisitions (Table Text Block)
 3 Months Ended
Jun. 30, 2016
Business Acquisition [Line Items]  
Business Acquisition, Pro Forma Information [Table Text Block]
 
Three Months Ended
 
 
June 30, 2016
June 30, 2015
 
Net sales
$
149,013

$
162,558

 
Net income
$
6,401

$
7,582

 
Net income per share - Basic
$
0.32

$
0.38

 
Net income per share - Diluted
$
0.32

$
0.37

 
Schedule of Purchase Price Allocation