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Commitments and Contingencies (Tables)
 3 Months Ended
Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]  
Schedule of warranty liability
Changes in the Company’s warranty liability for three months ended June 30, 2015 and 2014 were as follows (in thousands): 
 
 
Three Months Ended
June 30,
 
 
2015
 
2014
Beginning of the period
 
$
21,710

 
$
24,380

Provision
 
2,142

 
2,206

Settlements
 
(2,568
)
 
(3,166
)
End of the period
 
$
21,284

 
$
23,420