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Revenues (Tables)
12 Months Ended
Dec. 31, 2018
Revenues [Abstract]  
Disaggregation of Revenue
The following tables present revenue disaggregated by product line and timing of revenue recognition for the years ended December 31, 2018, 2017 and 2016:

 
2018
 
Orthopedic Surgery
 
General Surgery
 
Total
Timing of Revenue Recognition
 
 
 
 
 
Goods transferred at a point in time
$
413,630

 
$
411,391

 
$
825,021

Services transferred over time
33,098

 
1,515

 
34,613

Total sales from contracts with customers
$
446,728

 
$
412,906

 
$
859,634


 
2017
 
Orthopedic Surgery
 
General Surgery
 
Total
Timing of Revenue Recognition
 
 
 
 
 
Goods transferred at a point in time
$
396,147

 
$
366,672

 
$
762,819

Services transferred over time
32,797

 
776

 
33,573

Total sales from contracts with customers
$
428,944

 
$
367,448

 
$
796,392


 
2016
 
Orthopedic Surgery
 
General Surgery
 
Total
Timing of Revenue Recognition
 
 
 
 
 
Goods transferred at a point in time
$
391,114

 
$
341,276

 
$
732,390

Services transferred over time
30,989

 
141

 
31,130

Total sales from contracts with customers
$
422,103

 
$
341,417

 
$
763,520

Contract with Customer, Asset and Liability
Contract liability balances related to the sale of extended warranties to customers are as follows:
 
December 31, 2018
 
December 31, 2017
 
 
 
 
Contract Liability
$
11,043

 
$
7,786