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Warranty (Tables)
 9 Months Ended
Dec. 31, 2017
Disclosure Analysis Of Changes In Liability For Product Warranties [Abstract]  
Analysis Of Changes In Liability For Product Warranties An analysis of changes in the liability for product warranties is as follows:

 
 
Quarter ended
 
Nine months ended
 
 
December 31, 2017
 
January 1, 2017
 
December 31, 2017
 
January 1, 2017
Balance at beginning of period
 
$
47,113

 
$
48,112

 
$
46,116

 
$
48,422

Current period provisions
 
6,204

 
4,085

 
13,012

 
14,932

Costs incurred
 
(3,843
)
 
(4,250
)
 
(10,880
)
 
(12,492
)
Foreign currency translation adjustment
 
23

 
(1,720
)
 
1,249

 
(4,635
)
Balance at end of period
 
$
49,497

 
$
46,227

 
$
49,497

 
$
46,227