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Commitments and Contingencies - Changes in Warranty Liability (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Changes in the warranty liability:    
Beginning of the period $ 40,039 $ 34,229
Provision 5,389 8,535
Settlements (6,161) (6,977)
Currency translation 183 27
End of the period $ 39,450 $ 35,814