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Debt - Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Debt Disclosure [Abstract]        
Gross interest cost $ 40,161 $ 34,075 $ 108,459 $ 103,069
Capitalized interest (9,064) (4,808) (21,829) (14,529)
Interest expense $ 31,097 $ 29,267 $ 86,630 $ 88,540