Stockholders' Equity and Redeemable Preferred Stock - Distributions declared and paid (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($)
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	$ 20,413
Distributions Paid	20,799
Class A common stock
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	3,943
Distributions Paid	3,630
Class C Common Stock [Member]
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	12
Distributions Paid	12
Series A Preferred Stock [Member]
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	706
Distributions Paid	1,842
Series B Preferred Stock [Member]
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	7,089
Distributions Paid	7,400
Series C Preferred Stock [Member]
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	1,094
Distributions Paid	1,094
Series D Preferred Stock [Member]
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	1,235
Distributions Paid	1,235
Series T Preferred Stock [Member]
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	4,493
Distributions Paid	4,049
Operating Partnership Units One [Member]
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	1,027
Distributions Paid	1,027
Long-term Incentive Plan Units One [Member]
Distribution Made to Unit-holder Of Limited Partnership [Line Items]
Distributions Declared	814
Distributions Paid	$ 510