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Product Warranties (Tables)
 6 Months Ended
Dec. 31, 2017
Product Warranties Disclosures [Abstract]  
Product Warranties
Changes in the Company’s product warranty liability, which is included in accrued expenses on the unaudited condensed consolidated balance sheets, were as follows: 
 
 
Three Months Ended
 
Six Months Ended
 
 
December 31, 2017
 
December 31, 2016
 
December 31, 2017
 
December 31, 2016
Beginning balance
 
$
14,725

 
$
8,733

 
$
10,050

 
$
8,083

Add: Warranty expense
 
1,717

 
1,772

 
4,725

 
3,641

          Additions for Cobalt acquisition
 
—

 
—

 
4,404

 
—

Less: Warranty claims paid
 
(925
)
 
(1,301
)
 
(3,662
)
 
(2,520
)
Ending balance
 
$
15,517

 
$
9,204

 
$
15,517

 
$
9,204