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Commitments and Contingencies - Changes in Warranty Liability (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Changes in the warranty liability:        
Beginning of the period $ 31,754 $ 24,349 $ 27,573 $ 21,911
Assumed from business acquisition 0 0 351 1,230
Provision 11,305 7,820 30,625 17,535
Settlements (7,523) (6,050) (22,405) (15,229)
Currency translation (61) 145 (669) 817
End of the period $ 35,475 $ 26,264 $ 35,475 $ 26,264