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Capitalized Interest (Tables) | 9 Months Ended
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Sep. 30, 2018
Capitalized Interest Costs, Including Allowance for Funds Used During Construction [Abstract] |
Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales | The following table reflects the changes in the Company's capitalized interest during 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
Interest capitalized, beginning of period |  | $ | 5,388 |  |  | $ | 5,952 |  |  | $ | 5,583 |  |  | $ | 5,106 |
Interest incurred |  | 6,517 |  |  | 6,615 |  |  | 19,737 |  |  | 19,754 |
Interest charged to interest expense |  | (6,197 | ) |  | (6,120 | ) |  | (18,808 | ) |  | (17,870 | )
Interest charged to cost of sales |  | (1,136 | ) |  | (778 | ) |  | (1,940 | ) |  | (1,321 | )
Interest capitalized, end of period |  | $ | 4,572 |  |  | $ | 5,669 |  |  | $ | 4,572 |  |  | $ | 5,669 |

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