Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	9 Months Ended
	Mar. 02, 2021	Sep. 30, 2021	Sep. 30, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Common stock, outstanding (in shares)				0
Preferred stock, authorized (in shares)		50,000,000	50,000,000	50,000,000
Preferred stock, par value (in dollars per share)		$ 0.01	$ 0.01	$ 0.01
Preferred stock, issued (in shares)		10,300,000	10,300,000	10,000,000
Preferred stock, outstanding (in shares)		10,300,000	10,300,000	10,000,000
Preferred stock, aggregate liquidation preference		$ 550,000	$ 550,000	$ 250,000
Number of shares repurchased		153,949
Shares repurchased, average cost (in dollars per share)		$ 37.55
Class A Common Stock
Class of Stock [Line Items]
Common stock, authorized (in shares)		500,000,000	500,000,000	500,000,000
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01	$ 0.01
Common stock, issued (in shares)		113,987,154	113,987,154	113,852,896
Common stock, outstanding (in shares)		113,987,154	113,987,154	113,852,896
Class B Non-Voting Common Stock
Class of Stock [Line Items]
Common stock, authorized (in shares)		10,000,000	10,000,000	10,000,000
Common stock, par value (in dollars per share)		$ 0.01	$ 0.01	$ 0.01
Common stock, issued (in shares)		0	0	0
Common stock, outstanding (in shares)		0	0	0
Preferred Stock, Series A
Class of Stock [Line Items]
Preferred stock, dividend rate			6.15%
Preferred stock, issued (in shares)		10,000,000	10,000,000	10,000,000
Preferred stock, outstanding (in shares)		10,000,000	10,000,000	10,000,000
Preferred stock, aggregate liquidation preference		$ 250,000	$ 250,000	$ 250,000
Preferred stock, liquidation preference (in dollars per share)		$ 25.00	$ 25.00
Preferred Stock, Series B
Class of Stock [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, dividend rate	4.65%		4.65%
Preferred stock, issued (in shares)		300,000	300,000
Preferred stock, outstanding (in shares)		300,000	300,000
Preferred stock, aggregate liquidation preference		$ 300,000	$ 300,000
Preferred stock, liquidation preference (in dollars per share)	$ 1,000	$ 1,000	$ 1,000
Issuance of preferred stock (in shares)	300,000
Preferred stock, dividend rate (in dollars per share)	$ 1,000
Preferred stock, dividend rate, reset period	5 years
Preferred stock, redemption price (in dollars per share)		$ 1,000	$ 1,000
US Treasury (UST) Interest Rate | Preferred Stock, Series B
Class of Stock [Line Items]
Preferred stock, dividend rate, basis spread	4.076%		4.076%