Capitalized Interest - Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Capitalized Interest Costs, Including Allowance for Funds Used During Construction [Roll Forward]
Interest capitalized, beginning of period	$ 2,673	$ 3,854	$ 3,499	$ 4,154
Interest incurred	11,792	6,596	28,092	19,702
Interest expense	(11,687)	(6,293)	(27,698)	(18,809)
Interest charged to cost of sales	(370)	(581)	(1,485)	(1,471)
Interest capitalized, end of period	$ 2,408	$ 3,576	$ 2,408	$ 3,576