Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Tenant and other receivables allowance		$ 488
Deferred rent receivables allowance		$ 19
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Class A Common Stock
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	180,877,597	173,872,536
Common stock, shares outstanding (in shares)	180,877,597	173,872,536
Class B Common Stock
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	1,016,799	1,038,090
Common stock, shares outstanding (in shares)	1,016,799	1,038,090
Private Perpetual Preferred Units, Series 2019
Private perpetual preferred units, liquidation preference per share (in dollars per share)	$ 13.52
Private perpetual preferred units, issued, shares	4,610,383
Private perpetual preferred units, outstanding, shares	4,610,383
Private Perpetual Preferred Units, Series 2014
Private perpetual preferred units, liquidation preference per share (in dollars per share)	$ 16.62	$ 16.62
Private perpetual preferred units, issued, shares	1,560,360	1,560,360
Private perpetual preferred units, outstanding, shares	1,560,360	1,560,360