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Business Segments
 12 Months Ended
Dec. 31, 2014
Segment Reporting [Abstract]  
Business segments
Business segments
Century Aluminum is a producer of primary aluminum, which trades as a global commodity. We are organized as a holding company with each of our operating primary aluminum smelters managed and operated as a separate facility reporting to our corporate headquarters. Each of our operating primary aluminum smelters meets the definition of an operating segment based on factors delineated in ASC 280 "Segment Reporting." We evaluated the similar economic and other characteristics, including nearly identical products, production processes, customers and distribution and have aggregated our four operating segments into one reportable segment, primary aluminum, based on these factors. In addition, all of our primary aluminum smelters share several key economic factors inherent in their common products and production processes. For example, all of our facilities' revenue is based on the LME price for primary aluminum.
A reconciliation of our consolidated assets to the total of primary aluminum segment assets is provided below.
Segment assets (1)
2014
2013
2012
Primary
$
1,971,900

$
1,770,749

$
1,730,321

Corporate, unallocated
42,135

39,447

46,005

Total assets
$
2,014,035

$
1,810,196

$
1,776,326

(1)
Segment assets include accounts receivable, due from affiliates, prepaid and other current assets, inventory, intangible assets and property, plant and equipment — net; the remaining assets are unallocated corporate assets.
Geographic information
Included in the consolidated financial statements are the following amounts related to geographic locations:
 
2014
2013
2012
Net sales:
 
 
 
United States
$
1,370,570

$
1,022,081

$
821,976

Iceland
560,472

432,232

450,135

Long-lived assets: (1)
 

 

 

United States
$
487,536

$
392,424

$
368,897

Iceland
831,507

853,636

869,809

Other
95,752

93,075

50,223

(1)
Includes long-lived assets other than financial instruments.
Major customer information
The following table shows our major customers whose sales revenue exceeded 10% of our net sales.  A loss of any of these customers could have a material adverse effect on our results of operations.  The net sales revenue for these customers is as follows:
 
Year Ended December 31,
 
2014
2013
2012
Glencore
$
1,262,101

$
511,051

$
552,299

Southwire
226,740

312,102

346,311

RTA
—

223,353

—

BHP Billiton
—

191,445

202,500