Senior Unsecured Notes and Secured Debt - Summary of Secured Debt 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	23,569	$ 62,055	$ 343,696
Foreign currency	(1,712)
Ending balance	13,910,273	2,378,073
Secured Debt
Amount
Beginning balance	2,378,073	2,993,342	2,485,711
Debt issued	23,569	62,055	343,696
Debt assumed	0	0	385,145
Debt extinguished	(132,031)	(632,288)	(230,108)
Principal payments	(65,587)	(62,707)	(54,325)
Foreign currency		17,671	63,223
Ending balance	$ 2,202,312	$ 2,378,073	$ 2,993,342
Weighted Avg. Interest Rate
Beginning balance	3.27%	3.63%	3.90%
Debt issued	0.0283	0.0255	0.0311
Debt assumed	0	0	0.0434
Debt extinguished	0.0586	0.0221	0.0435
Principal payments	0.0340	0.0363	0.0375
Foreign currency	0.0272	0.0293	0.0328
Ending balance	3.03%	3.27%	3.63%