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Revenues (Tables) | 9 Months Ended
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Sep. 30, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | Each of the Company’s product lines represented the following approximate percentage of total sales for the three and nine months ended September 30, 2018 and 2017:
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2018 |  | 2017 |  | 2018 |  | 2017
Nylon | 28% |  |  | 28% |  |  | 28% |  |  | 29% |
Caprolactam | 18% |  |  | 19% |  |  | 18% |  |  | 19% |
Ammonium Sulfate Fertilizers | 19% |  |  | 20% |  |  | 20% |  |  | 20% |
Chemical Intermediates | 35% |  |  | 33% |  |  | 34% |  |  | 32% |
| 100% |  |  | 100% |  |  | 100% |  |  | 100% |
The Company's revenues by geographic area for the three and nine months ended September 30, 2018 and 2017 were as follows:
| Three Months Ended September 30, |  |  |  | Nine Months Ended September 30, |  |
| 2018 |  | 2017 |  | 2018 |  | 2017
United States | $ | 306,050 |  | $ | 289,480 |  | $ | 946,195 |  | $ | 889,515
International | 62,603 |  | 77,180 |  | 182,155 |  | 215,290
Total | $ | 368,653 |  | $ | 366,660 |  | $ | 1,128,350 |  | $ | 1,104,805
Summary of Deferred Income and Customer Advances | Below is a roll-forward of Deferred Income and Customer Advances for the nine months ended September 30, 2018:
Opening balance January 1, 2018 | $ | 17,194
Additional cash advances | 2,883
Less amounts recognized in revenues | (17,782)
Ending balance September 30, 2018 | $ | 2,295

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130551-203045 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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