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Commitments and Contingencies (Tables)
 6 Months Ended
Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]  
Schedule of warranty liability
Changes in the Company’s warranty liability for the three and six months ended September 30, 2017 and 2016 were as follows (in thousands): 
 
Three Months Ended
September 30,
 
Six Months Ended
September 30,
 
2017
 
2016
 
2017
 
2016
Beginning of the period
$
22,056

 
$
21,752

 
$
21,911

 
$
20,380

Assumed from business acquisition
1,230

 
150

 
1,230

 
1,963

Provision
5,414

 
3,163

 
9,715

 
6,340

Settlements
(4,611
)
 
(3,452
)
 
(9,179
)
 
(6,880
)
Currency translation
260

 
(1
)
 
672

 
(191
)
End of the period
$
24,349

 
$
21,612

 
$
24,349

 
$
21,612