Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 182,956	$ 366,122	$ 350,994
Preferred stock dividends	(11,500)	(11,500)	(17,111)
Net income available to common equity	171,456	354,622	333,883
Common shareholder dividends	(128,748)	(122,417)	(115,212)
Unvested share-based payment awards	(785)	(720)	(849)
Undistributed earnings	41,922	231,485	217,822
Undistributed earnings allocated to common shareholders	41,675	229,995	216,299
Undistributed earnings allocated to unvested share-based payment awards	247	1,490	1,523
Undistributed earnings	41,922	231,485	217,822
Basic
Distributed earnings to common shareholders	128,748	122,417	115,212
Undistributed earnings allocated to common shareholders	41,675	229,995	216,299
Total common shareholders earnings, basic	170,424	352,412	331,510
Diluted
Distributed earnings to common shareholders	128,748	122,417	115,212
Undistributed earnings allocated to common shareholders	41,675	229,995	216,299
Total common shareholders earnings, diluted	$ 170,424	$ 352,412	$ 331,510
Weighted average common shares outstanding	149,968	149,162	150,773
Effect of dilutive common stock awards	892	1,334	1,214
Diluted weighted average common shares outstanding	150,860	150,496	151,987
Basic earnings per common share	$ 1.14	$ 2.36	$ 2.20
Diluted earnings per common share	$ 1.13	$ 2.34	$ 2.18