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Other Accounts Receivable
 12 Months Ended
Dec. 31, 2018
Receivables [Abstract]  
Other Accounts Receivable
Other Accounts Receivable:
Other accounts receivable consist of the following at December 31, 2018 and 2017 (in thousands):
 
December 31,
 
2018
 
2017
Value added tax/consumption tax
$
40,480

 
$
23,158

Other
11,579

 
14,779

Total
$
52,059

 
$
37,937