Earnings Per Common Share (Earnings Per Share Basic And Diluted) (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share Reconciliation [Abstract]
Net (loss) income	$ (16,747)	$ 108,078
Less: Preferred stock dividends	3,431	1,969
(Loss) earnings applicable to common shareholders	(20,178)	106,109
Net (loss) income available to common shareholders	(20,178)	106,109
Less: (Loss) earnings allocated to participating securities, basic	0	579
Less: (Loss) earnings allocated to participating securities, diluted	0	579
(Loss) earnings applicable to common shareholders	(20,178)	105,530
(Loss) earnings applicable to common shareholders	$ (20,178)	$ 105,530
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding - basic (in shares)	147,394	89,809
Effect of dilutive securities (in shares)	0	299
Weighted-average common shares outstanding - diluted (in shares)	147,394	90,108
Earnings Per Share, Basic and Diluted [Abstract]
Basic (loss) earnings per common share (in dollars per share)	$ (0.14)	$ 1.18
Diluted (loss) earnings per common share (in shares)	$ (0.14)	$ 1.17