Stockholders' Equity and EPS - Preferred Stock Summary Schedule (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 09, 2019
Class of Stock [Line Items]
Preferred stock, shares issued, value	$ 340,138	$ 340,138
Preferred stock, shares issued	350,000	350,000
Par Value	$ 0.001	$ 0.001
Preferred Stock, Series A
Class of Stock [Line Items]
Amount outstanding	$ 350,000
Preferred stock, shares issued, value	$ 340,100
Preferred stock, shares issued	350,000		350,000
Par Value	$ 0.001		$ 0.001
Ownership interest per depository share (usd per share)	2.50%
Liquidation preference per depository share (usd per share)			$ 25
2020 dividends paid per depository share (usd per share)	$ 1.23