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Product Warranties (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Movement in Standard Product Warranty Accrual [Roll Forward]        
Beginning balance $ 8,733 $ 7,180 $ 8,083 $ 6,610
Add: Warranty expense 1,772 948 3,641 2,543
Less: Warranty claims paid (1,301) (952) (2,520) (1,977)
Ending balance $ 9,204 $ 7,176 $ 9,204 $ 7,176