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Product Warranties (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Movement in Standard Product Warranty Accrual [Roll Forward]        
Beginning balance $ 15,517 $ 9,204 $ 10,050 $ 8,083
Add: Warranty expense 2,927 2,222 7,652 5,863
Standard and Extended Product Warranty Accrual, Additions from Business Acquisition 0 0 4,404 0
Less: Warranty claims paid (1,586) (1,244) (5,248) (3,764)
Ending balance $ 16,858 $ 10,182 $ 16,858 $ 10,182