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Financing Arrangement - Financing Arrangement Activity (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule of Joint Ventures [Line Items]
Total incurred interest (income) expense		$ (135,281)	$ (62,517)	$ 6,883
Financing arrangement \| Joint venture
Schedule of Joint Ventures [Line Items]
Distributions of the partner's share of net income	$ 1,144		7,184	9,079
Distributions in excess of the partner's share of net income	3,097		6,939	6,376
Adjustment to fair value of financing arrangement obligation	(139,522)		(76,640)	(15,225)
Total incurred interest (income) expense	$ (135,281)	$ (135,281)	$ (62,517)	$ 230