Permanent and Temporary Equity (Redeemable OP Unitholder and Noncontrolling Interest) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Increase (Decrease) in Temporary Equity [Roll Forward]
December 31, 2018	$ 188,141
New issuances	81,181
Change in valuation	15,119
Distributions and other	(9,298)
Redemptions	(1,465)
December 31, 2019	273,678
Non- controlling Interests
Increase (Decrease) in Temporary Equity [Roll Forward]
December 31, 2018	13,589
New issuances	81,181
Change in valuation	7,730
Distributions and other	0
Redemptions	0
December 31, 2019	102,500
General Partner
Increase (Decrease) in Temporary Equity [Roll Forward]
December 31, 2018	174,552
New issuances	0
Change in valuation	7,389
Distributions and other	(9,298)
Redemptions	(1,465)
December 31, 2019	$ 171,178