Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Equity:
Preferred stock, par value (in 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 (in 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)	176,112,860	180,877,597
Common stock, shares outstanding (in shares)	176,112,860	180,877,597
Class B Common Stock
Common stock, par value (in 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)	1,015,149	1,016,799
Common stock, shares outstanding (in shares)	1,015,149	1,016,799
Private Perpetual Preferred Units, Series 2014
Private perpetual preferred units, per unit liquidation preference (in USD per share)	$ 16.62	$ 16.62
Private perpetual preferred units, issued (in shares)	1,560,360	1,560,360
Private perpetual preferred units, outstanding (in shares)	1,560,360	1,560,360
Private Perpetual Preferred Units, Series 2019
Private perpetual preferred units, per unit liquidation preference (in USD per share)	$ 13.52	$ 13.52
Private perpetual preferred units, issued (in shares)	4,664,038	4,610,383
Private perpetual preferred units, outstanding (in shares)	4,664,038	4,610,383