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Business Segments
 12 Months Ended
Dec. 31, 2013
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. 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 a single 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. In addition, our identified reportable segment is consistent with other comparable companies in our industry.

A reconciliation of our consolidated assets to the total of primary aluminum segment assets is provided below.

Segment assets (1)
2013
2012
2011
Primary
$
1,770,749

$
1,730,321

$
1,767,305

Corporate, unallocated
39,447

46,005

43,789

Total assets
$
1,810,196

$
1,776,326

$
1,811,094



(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:
 
2013
2012
2011
Net sales:
 
 
 
United States
$
1,022,081

$
821,976

$
835,796

Iceland
432,232

450,135

520,628

Long-lived assets: (1)
 

 

 

United States
$
392,424

$
368,897

$
401,173

Iceland
853,636

869,809

884,682

Other
93,075

50,223

36,919



(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,
 
2013
2012
2011
Glencore
$
511,051

$
552,299

$
564,431

Southwire
312,102

346,311

373,505

RTA
223,353

—

—

BHP Billiton
191,445

202,500

239,157