Consolidated Statements of Cash Flows - Supplemental Information - Supplemental Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Interest paid	$ 34,159	$ 31,800
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	46,152	44,570
Transfers from projects under development to operating properties	0	277,097
Transfer from land held and other assets to projects under development	$ 0	$ 29,121