Capitalized Interest - Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
Capitalized Interest Costs, Including Allowance for Funds Used During Construction [Roll Forward] | ||
Interest capitalized, beginning of period | $ 5,583 | $ 5,106 |
Interest incurred | 6,595 | 6,559 |
Interest expense | (6,282) | (5,836) |
Interest charged to cost of sales | (351) | (265) |
Interest capitalized, end of period | $ 5,545 | $ 5,564 |