Senior Unsecured Notes and Secured Debt - Summary of Senior Unsecured Note Principal Activity (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Amount
Beginning balance	$ 2,378,073
Debt issued	1,703,626	$ 1,588,549	$ 3,974,559
Foreign currency	(1,712)
Ending balance	13,910,273	2,378,073
Senior Unsecured Notes
Amount
Beginning balance	11,509,533	10,427,562	9,699,984
Debt issued	1,750,000	1,600,000	3,987,790
Debt extinguished	(1,533,752)	(566,248)	(3,335,290)
Foreign currency	(17,820)	48,219	75,078
Ending balance	$ 11,707,961	$ 11,509,533	$ 10,427,562
Weighted Avg. Interest Rate
Beginning balance	3.67%	4.03%	4.48%
Debt issued	0.0257	0.0189	0.0334
Debt extinguished	0.0242	0.0326	0.0439
Foreign currency	0.0455	0.0435	0.0422
Ending balance	3.67%	3.67%	4.03%