Stockholders' Equity and EPS - Preferred Stock (Details) - USD ($)		12 Months Ended
	Dec. 09, 2019	Dec. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Preferred stock, shares issued		350,000	350,000
Preferred stock, par value		$ 0.001	$ 0.001
Preferred stock, shares issued, value		$ 340,138,000	$ 340,138,000
Preferred stock, shares outstanding		350,000	350,000
Preferred Stock, Series A
Class of Stock [Line Items]
Preferred stock, shares issued	350,000	350,000
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, liquidation preference (usd per share)	$ 1,000
Preferred stock, depositary share ownership interest		2.50%
Preferred stock, dividend rate (percent)	5.25%
Preferred stock, shares issued, value		$ 340,100,000
Preferred stock, shares outstanding		350,000
Preferred stock, liquidation preference, value		$ 350,000,000.0
Preferred stock, dividends paid per depositary share (usd per share)		$ 1.23
Preferred stock, liquidation preference per depositary share (usd per share)	$ 25