Capitalized Interest (Tables)

12 Months Ended

Dec. 31, 2019

Capitalized Interest Costs, Including Allowance for Funds Used During Construction [Abstract]

Summary of Interest Costs Incurred, Capitalized, Expensed and Charged to Cost of Sales

Our interest costs incurred, capitalized, expensed and charged to cost of sales during the years ended December 31, 2019, 2018 and 2017 was as follows:

	December 31,
	2019			2018			2017
Interest capitalized, beginning of year	$	4,154		$	5,583		$	5,106
Interest incurred	26,463			26,277			26,384
Interest charged to interest expense	(25,380		)	(25,081		)	(24,185		)
Interest charged to cost of sales	(1,738		)	(2,625		)	(1,722		)
Interest capitalized, end of year	$	3,499		$	4,154		$	5,583