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Revenue
 12 Months Ended
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
AdvanSix serves around 400 customers annually, primarily in the United States, spanning a wide variety of industries worldwide. For 2024, 2023 and 2022, the Company's ten largest customers accounted for approximately 38%, 39% and 39% of total sales, respectively.

We typically sell to customers under master services agreements, with primarily one-year terms, or by purchase orders. We have historically experienced low customer turnover and have an average customer relationship of approximately 20 years. Our largest customer is Shaw Industries Group Inc. ("Shaw"), a significant consumer of caprolactam and Nylon 6 resin. We sell caprolactam and Nylon 6 resin to Shaw under a long-term agreement. Sales to Shaw were 10% of our total sales for the year ended December 31, 2024, 11% for the year ended December 31, 2023 and 12% for the year ended December 31, 2022.

The Company’s revenue by product line, and related approximate percentage of total sales for 2024, 2023 and 2022 were as follows:

Twelve Months Ended December 31, 2024 and 2023
202420232022
Nylon$348,501 23%$356,632 23%$485,241 25%
Caprolactam276,303 18%298,375 20%319,863 16%
Plant Nutrients*458,152 30%477,929 31%657,984 34%
Chemical Intermediates*434,601 29%400,663 26%482,552 25%
$1,517,557 100%$1,533,599 100%$1,945,640 100%
* The Company transferred certain products between its Chemical Intermediates product line and its Plant Nutrients product line to align more closely with its current sales structure. Historical information has been reclassified to reflect these changes for all periods presented in the Consolidated Financial Statements. Total revenue amounts were not impacted for either period.

The Company’s revenues by geographic area, and related approximate percentage of total sales for 2024, 2023 and 2022 were as follows:

Twelve Months Ended December 31, 2024 and 2023
202420232022
United States$1,304,971 86 %$1,250,094 82 %$1,622,537 83 %
International212,586 14 %283,505 18 %323,103 17 %
Total$1,517,557 100 %$1,533,599 100 %$1,945,640 100 %

Deferred Income and Customer Advances

The Company defers revenues when cash payments are received in advance of our performance. Customer advances relate primarily to sales from the ammonium sulfate business. Below is a roll-forward of Deferred income and customer advances for the twelve months ended December 31, 2024:
Deferred Income and Customer Advances2024
Opening balance January 1, 2024$15,678 
Additional cash advances37,954 
Less amounts recognized in revenues(16,094)
Ending balance December 31, 2024$37,538 
The Company expects to recognize as revenue the December 31, 2024 ending balance of Deferred income and customer advances within one year or less.