Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 155,036	$ 146,600	$ 114,985	$ (27,586)	$ 301,636	$ 87,399
Preferred dividends	(4,033)		(4,033)		(8,067)	(6,050)
Net income applicable to common shareholders	$ 151,003		$ 110,952		$ 293,569	$ 81,349
Weighted average common shares outstanding:
Weighted average common shares outstanding (basic) (in shares)	290,559		290,862		290,822	259,108
Effect of dilutive securities:
Restricted stock (in shares)	707		1,014		1,047	1,136
Stock appreciation rights (in shares)	0		5		1	9
Weighted average diluted shares outstanding (in shares)	291,266		291,881		291,870	260,253
Basic Net Income Per Common Share (in dollars per share)	$ 0.52		$ 0.38		$ 1.01	$ 0.31
Diluted Net Income Per Common Share (in dollars per share)	$ 0.52		$ 0.38		$ 1.01	$ 0.31