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Product Warranties (Tables)
 9 Months Ended
Mar. 31, 2018
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
 
Nine Months Ended
 
 
March 31, 2018
 
March 31, 2017
 
March 31, 2018
 
March 31, 2017
Beginning balance
 
$
15,517

 
$
9,204

 
$
10,050

 
$
8,083

Add: Warranty expense
 
2,927

 
2,222

 
7,652

 
5,863

          Additions for Cobalt acquisition
 
—

 
—

 
4,404

 
—

Less: Warranty claims paid
 
(1,586
)
 
(1,244
)
 
(5,248
)
 
(3,764
)
Ending balance
 
$
16,858

 
$
10,182

 
$
16,858

 
$
10,182