Supplemental Disclosures of Noncash Investing and Financing Activities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Other assets assumed at acquisition	$ 245	$ 0
Operating lease liability assumed at acquisition	961	34,791
Other liabilities assumed at acquisition	245	0
Amortization of net discounts on debt	45	45
Accrued investments in unconsolidated joint ventures	0	88
Accrued capital expenditures and deferred lease costs	15,447	19,603
Market value adjustments to interest rate swaps that qualify for hedge accounting treatment	(19,993)	(1,431)
Issuance of Preferred OP Units for the Normandy Acquisition (Note 3)	55,306	0
Stock-based compensation expense	$ 4,348	$ 1,539