Summary of Significant Accounting Policies and Procedures and New Accounting Standards - Disaggregation of Revenue by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 3,343,681	$ 2,080,463	$ 1,647,087
Rental (including reimbursable)	3,299,657	2,064,958	1,639,533
Other	44,024	15,505	7,554
Retail
Disaggregation of Revenue [Line Items]
Revenues	2,730,100	1,709,800	1,368,400
Industrial
Disaggregation of Revenue [Line Items]
Revenues	495,400	271,100	185,900
Other (2)
Disaggregation of Revenue [Line Items]
Revenues	74,200	84,100	85,200
U.S.
Disaggregation of Revenue [Line Items]
Rental (including reimbursable)	2,995,300	1,912,300	1,582,300
U.S. | Retail
Disaggregation of Revenue [Line Items]
Revenues	2,455,900	1,566,700	1,312,500
U.S. | Industrial
Disaggregation of Revenue [Line Items]
Revenues	465,200	261,500	184,600
U.S. | Other (2)
Disaggregation of Revenue [Line Items]
Revenues	74,200	84,100	85,200
U.K.
Disaggregation of Revenue [Line Items]
Rental (including reimbursable)	273,500	148,500	57,200
U.K. | Retail
Disaggregation of Revenue [Line Items]
Revenues	243,300	138,900	55,900
U.K. | Industrial
Disaggregation of Revenue [Line Items]
Revenues	30,200	9,600	1,300
U.K. | Other (2)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Other
Disaggregation of Revenue [Line Items]
Rental (including reimbursable)	30,900	4,200	0
Other | Retail
Disaggregation of Revenue [Line Items]
Revenues	30,900	4,200	0
Other | Industrial
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Other | Other (2)
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0