Consolidated Statements of Cash Flows - Supplemental Information - Supplemental Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 61,235	$ 56,761
Income taxes paid	155	0
Non-Cash Activity:
Transfer from operating properties and related assets and liabilities to assets and liabilities of real estate assets held for sale	249,365	0
Common stock dividends declared and accrued	46,319	44,569
Transfers from projects under development to operating properties	0	443,932
Transfer from land held and other assets to projects under development	0	29,121
Change in accrued property, acquisition, development, and tenant expenditures	$ 0	$ 35,707