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Warranties (Tables)
 12 Months Ended
Jan. 31, 2015
Product Warranty Costs [Abstract]  
Warranties
Changes in the warranty accrual were as follows:
 
 
For the years ended January 31,
 
 
2015
 
2014
 
2013
Beginning balance
 
$
2,525

 
$
1,888

 
$
1,699

Acquired
 
50

 
—

 
—

Accrual for warranties
 
3,467

 
4,561

 
2,968

Settlements made
 
(2,922
)
 
(3,924
)
 
(2,779
)
Ending balance
 
$
3,120

 
$
2,525

 
$
1,888