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Product Warranty Costs (Tables)
 9 Months Ended
May 31, 2018
Guarantees [Abstract]  
Schedule of Product Warranty Liability
The following is a rollforward of the product warranty reserves for the nine months ended May 31, 2018 and 2017 (in thousands):
 
Nine Months Ended May 31,
 
2018
 
2017
Beginning balance
$
6,616

 
$
5,592

Provision for warranties
4,213

 
2,569

Warranty payments and costs incurred
(5,604
)
 
(3,993
)
Impact of changes in foreign currency rates
95


(13
)
Ending balance
$
5,320

 
$
4,155