Real Estate Transactions - Development Activities (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Feb. 28, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Real Estate [Line Items]
Development and redevelopment projects, amount increase					$ 41,000
Development commitments			$ 347,000		347,000
Depreciation and amortization of real estate, in-place lease, and other intangibles			171,459	$ 139,691	328,997	$ 264,803
Decrease to income (loss) from continuing operations			$ (168,065)	$ (60,341)	$ (47,480)	$ (207,473)
Continuing operations basic earnings per share (in dollars per share)			$ (0.30)	$ (0.10)	$ (0.07)	$ (0.38)
Continuing operations diluted earnings per share (in dollars per share)			$ (0.30)	$ (0.10)	$ (0.07)	$ (0.38)
Life science
Real Estate [Line Items]
Weighted average remaining useful life	6 years	15 years
Depreciation and amortization of real estate, in-place lease, and other intangibles			$ 11,000		$ 15,000
Decrease to income (loss) from continuing operations			$ 11,000		$ 15,000
Continuing operations basic earnings per share (in dollars per share)			$ 0.02		$ 0.03
Continuing operations diluted earnings per share (in dollars per share)			$ 0.02		$ 0.03