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Product Warranties (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Movement in Standard Product Warranty Accrual [Roll Forward]        
Beginning balance $ 14,725 $ 8,733 $ 10,050 $ 8,083
Add: Warranty expense 1,717 1,772 4,725 3,641
Standard and Extended Product Warranty Accrual, Additions from Business Acquisition 0 0 4,404 0
Less: Warranty claims paid (925) (1,301) (3,662) (2,520)
Ending balance $ 15,517 $ 9,204 $ 15,517 $ 9,204