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Notes Payable - Capitalized Interest (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Debt Disclosure [Abstract]      
Interest incurred $ 45,555 $ 38,216 $ 24,275
Less: Amounts capitalized (45,555) (38,216) (24,275)
Interest expense 0 0 0
Cash paid for interest 42,438 23,376 19,704
Amortization of financing costs and discounts $ 4,100 $ 4,600 $ 4,100