Notes Payable - Terms of Notes Payable (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Notes payable, gross	$ 2,567,055	$ 2,462,068
Unamortized loan costs	(3,723)	(4,441)
Total Notes Payable	$ 2,563,332	2,457,627
Weighted average maturity of notes payable	2 years 9 months 18 days
Unsecured Notes
Debt Instrument [Line Items]
Notes payable, gross	$ 2,042,200	1,935,100
Credit Facility
Debt Instrument [Line Items]
Interest rate	6.31%
Notes payable, gross	$ 292,200	185,100
Term Loan, Unsecured Due In 2025 | Term Loan Unsecured Due 2025
Debt Instrument [Line Items]
Interest rate	5.63%
Notes payable, gross	$ 400,000	400,000
Term Loan, Unsecured Due In 2024 | Term Loan Unsecured Due 2024
Debt Instrument [Line Items]
Interest rate	5.38%
Notes payable, gross	$ 350,000	350,000
Senior Note | Senior Note, Unsecured Due 2029
Debt Instrument [Line Items]
Interest rate	3.95%
Notes payable, gross	$ 275,000	275,000
Senior Note | Senior Note, Unsecured Due 2025
Debt Instrument [Line Items]
Interest rate	3.91%
Notes payable, gross	$ 250,000	250,000
Senior Note | Senior Note, Unsecured Due 2028
Debt Instrument [Line Items]
Interest rate	3.86%
Notes payable, gross	$ 250,000	250,000
Senior Note | Senior Note, Unsecured Due 2027
Debt Instrument [Line Items]
Interest rate	3.78%
Notes payable, gross	$ 125,000	125,000
Senior Note | Senior Note, Unsecured Due 2027
Debt Instrument [Line Items]
Interest rate	4.09%
Notes payable, gross	$ 100,000	100,000
Secured Mortgage Notes
Debt Instrument [Line Items]
Notes payable, gross	524,855	526,968
Total Notes Payable	$ 524,900
Secured Mortgage Notes | Terminus
Debt Instrument [Line Items]
Interest rate	6.34%
Notes payable, gross	$ 221,000	221,000
Secured Mortgage Notes | Terminus 100
Debt Instrument [Line Items]
Notes payable, gross	123,000
Secured Mortgage Notes | Terminus 200
Debt Instrument [Line Items]
Notes payable, gross	$ 98,000
Secured Mortgage Notes | Fifth Third Center
Debt Instrument [Line Items]
Interest rate	3.37%
Notes payable, gross	$ 125,623	126,548
Secured Mortgage Notes | Colorado Tower
Debt Instrument [Line Items]
Interest rate	3.45%
Notes payable, gross	$ 106,176	106,862
Secured Mortgage Notes | Domain 10
Debt Instrument [Line Items]
Interest rate	3.75%
Notes payable, gross	$ 72,056	$ 72,558