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Revenue
3 Months Ended
Mar. 31, 2019
Revenue Recognition and Deferred Revenue [Abstract]  
Revenue
Revenue

We recognize revenue in accordance with ASC 606, “Revenue from Contracts with Customers” and the related amendments (“ASC 606”). We disaggregate our revenue by geographical region as follows:
Net Sales
 
For the three months ended March 31,
 
 
2019
2018
United States
 
$
325.2

$
268.2

Iceland
 
164.8

186.3

Total
 
$
490.0

$
454.5


Trade accounts receivable - net increased by $6.0 million from December 31, 2018, driven primarily by outstanding receivables due from third party customers with longer payment terms than our related party customer.