Senior Unsecured Notes and Secured Debt - Summary of Principal Activity (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)
Amount
Ending balance	$ 15,122,207
Senior unsecured notes
Amount
Beginning balance	12,584,529	$ 11,707,961
Debt issued	0	550,000
Foreign currency	30,870	(26,366)
Ending balance	$ 12,615,399	$ 12,231,595
Weighted Avg. Interest Rate
Beginning balance	4.06%	3.67%
Debt issued	0	0.0385
Foreign currency	0.0465	0.0414
Ending balance	4.06%	3.69%
Secured debt
Amount
Beginning balance	$ 2,129,954	$ 2,202,312
Debt issued	362,900	5,385
Debt assumed	53,223	0
Debt extinguished	(24,631)	(100,821)
Principal payments	(14,942)	(15,968)
Foreign currency	304	24,733
Ending balance	$ 2,506,808	$ 2,115,641
Weighted Avg. Interest Rate
Beginning balance	4.33%	3.03%
Debt issued	0.0497	0.0308
Debt assumed	0.0362	0
Debt extinguished	0.0453	0.0421
Principal payments	0.0391	0.0319
Foreign currency	0.0439	0.0273
Ending balance	4.55%	3.02%