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Capitalized Interest (Tables) | 6 Months Ended
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Jun. 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 six months ended June 30, 2018 and 2017:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Interest capitalized, beginning of period |  | $ | 5,545 |  |  | $ | 5,564 |  |  | $ | 5,583 |  |  | $ | 5,106 |
Interest incurred |  | 6,624 |  |  | 6,580 |  |  | 13,220 |  |  | 13,139 |
Interest charged to interest expense |  | (6,329 | ) |  | (5,914 | ) |  | (12,611 | ) |  | (11,750 | )
Interest charged to cost of sales |  | (452 | ) |  | (278 | ) |  | (804 | ) |  | (543 | )
Interest capitalized, end of period |  | $ | 5,388 |  |  | $ | 5,952 |  |  | $ | 5,388 |  |  | $ | 5,952 |

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