Supplemental Cash Flow Information of the Company - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
SUPPLEMENTAL CASH FLOWS INFORMATION:
Cash paid for interest, net of capitalized interest of $55,423 and $58,405 as of September 30, 2021 and 2020, respectively	$ 47,832	$ 35,898
Capitalized interest	55,423	58,405
Cash paid for amounts included in the measurement of ground lease liabilities	4,939	4,686
NON-CASH INVESTING TRANSACTIONS:
Accrual for expenditures for operating properties and development properties	79,891	154,253
Tenant improvements funded directly by tenants	8,179	9,118
Assumption of accrued liabilities in connection with acquisitions (Notes 2 and 11)	37,572	0
Initial measurement of operating right of use ground lease assets (Notes 2 and 11)	46,430	0
Initial measurement of operating ground lease liabilities (Notes 2 and 11)	46,430	0
NON-CASH FINANCING TRANSACTIONS:
Accrual of dividends and distributions payable to common stockholders and common unitholders (Note 17)	61,845	59,416
Exchange of common units of the Operating Partnership into shares of the Company’s common stock	$ 0	$ 3,972