Senior Unsecured Notes and Secured Debt - Summary of Principal Activity (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Amount
Ending balance	$ 16,191,695
Senior unsecured notes
Amount
Beginning balance	12,584,529	$ 11,707,961
Debt issued	1,035,000	1,050,000
Foreign currency	75,575	(143,634)
Ending balance	$ 13,695,104	$ 12,614,327
Weighted Avg. Interest Rate
Beginning balance	4.06%	3.67%
Debt issued	0.0275	0.0308
Foreign currency	0.0460	0.0414
Ending balance	4.00%	3.68%
Secured debt
Amount
Beginning balance	$ 2,129,954	$ 2,202,312
Debt issued	373,462	10,344
Debt assumed	73,671	221,159
Debt extinguished	(72,496)	(196,504)
Principal payments	(28,781)	(30,350)
Foreign currency	20,781	(6,335)
Ending balance	$ 2,496,591	$ 2,200,626
Weighted Avg. Interest Rate
Beginning balance	4.33%	3.03%
Debt issued	0.0505	0.0323
Debt assumed	0.0360	0.0432
Debt extinguished	0.0399	0.0415
Principal payments	0.0390	0.0329
Foreign currency	0.0407	0.0297
Ending balance	4.70%	3.43%