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Guarantees (Tables)
3 Months Ended
Mar. 31, 2018
Guarantees [Abstract]  
Changes in the carrying amount of service and product warranties
Changes in the carrying amount of service and product standard warranties for the three months ended March 31, are as follows:

 
2018
 
2017
Balance as of January 1,
$
1,750

 
$
1,954

 
 
 
 
Provision for warranties
323

 
150

 
 
 
 
Claims made
(290
)
 
(279
)
 
 
 


Balance as of March 31,
$
1,783

 
$
1,825