Shareholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Oct. 29, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Preferred stock, liquidation preference (in dollars per share)		$ 1,000	$ 0
Net proceeds from issuance of preferred stock		$ 192,878	$ 0	$ 0
Preferred stock, shares authorized (in shares)		10,000,000	0
Preferred stock, shares issued (in shares)		200,000	0
Depositary Shares
Equity, Class of Treasury Stock [Line Items]
Stock Issued During Period, Equivalent of Preferred Shares, Percent	2.50%
Depositary Shares
Equity, Class of Treasury Stock [Line Items]
Stock issued (in shares)	8,000,000.0
Preferred stock, liquidation preference (in dollars per share)	$ 25.00
Preferred stock, shares authorized (in shares)	200,000
Preferred stock, shares issued (in shares)	200,000
Series A Preferred Stock
Equity, Class of Treasury Stock [Line Items]
Preferred Stock, Dividend Rate, Percentage	5.125%
Preferred stock, liquidation preference (in dollars per share)	$ 1,000
Gross Proceeds from Issuance of Preferred Stock and Preference Stock	$ 200,000
Net proceeds from issuance of preferred stock	$ 192,900