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Guarantees
3 Months Ended
Mar. 31, 2016
Guarantees [Abstract]  
Guarantees
Guarantees

We provide warranties on certain of our products at the time of sale. The standard warranty period for our capital and reusable equipment is generally one year. Liability under service and warranty policies is based upon a review of historical warranty and service claim experience. Adjustments are made to accruals as claim data and historical experience warrant.

Changes in the carrying amount of service and product warranties for the three months ended March 31, are as follows:

 
2016
 
2015
 
 
 
 
Balance as of January 1,
$
2,509

 
$
2,286

 
 
 


Provision for warranties
833

 
951

 
 
 


Claims made
(841
)
 
(873
)
 
 
 


Balance as of March 31,
$
2,501

 
$
2,364