Stockholders' Equity - Cumulative Dividends (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Cumulative distributions to stockholders	$ 1,870,058	$ 1,837,955
Preferred Stock
Class of Stock [Line Items]
Cumulative distributions to stockholders	135,841	132,845
Common Stock
Class of Stock [Line Items]
Cumulative distributions to stockholders	$ 1,734,217	$ 1,705,110