Stockholders' Equity and Non-Controlling Interests - Declared Dividends (Details) - $ / shares				3 Months Ended		9 Months Ended
	Sep. 15, 2021	Jun. 14, 2021	Mar. 11, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stockholders' Equity Note [Abstract]
Dividends declared per common share (in dollars per share)	$ 0.48	$ 0.48	$ 0.48	$ 0.48	$ 0.48	$ 1.44	$ 1.44