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Inventories
3 Months Ended
Mar. 31, 2015
Inventories [Abstract]  
Inventories

Note 3. Inventories

Inventories consisted of the following:

  March 31,   December 31,
  2015   2014
  U.S. $ in thousands
Finished goods                                                      $ 72,235   $ 66,779
Work-in-process   7,927   7,815
Raw materials   50,796   48,791
  $ 130,958   $ 123,385