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Commitments and Contingencies - Product Warranties (Details) - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Changes in provision for warranties    
Warranty provision at beginning of period $ 20,825 $ 21,724
Additions and adjustments 3,103 4,759
Reductions for warranty repair costs (4,088) (4,757)
Warranty provision at end of period $ 19,840 $ 21,726