Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net income	$ 115,573	$ 81,169	$ 87,154	$ 103,360	$ 196,742	$ 190,514
Preferred stock dividends	(2,875)		(2,875)		(5,750)	(5,750)
Net income available to common equity	112,698		84,279		190,992	184,764
Common shareholder dividends	(33,310)		(31,802)		(66,718)	(63,611)
Unvested share-based payment awards	(197)		(194)		(317)	(398)
Undistributed earnings	79,191		52,283		123,958	120,755
Undistributed earnings allocated to common shareholders	78,723		51,965		123,256	120,047
Undistributed earnings allocated to unvested share-based payment awards	468		318		702	708
Basic
Distributed earnings to common shareholders	33,310		31,802		66,718	63,611
Undistributed earnings allocated to common shareholders	78,723		51,965		123,256	120,047
Total common shareholders earnings, basic	112,034		83,768		189,974	183,658
Diluted
Distributed earnings to common shareholders	33,310		31,802		66,718	63,611
Undistributed earnings allocated to common shareholders	78,723		51,965		123,256	120,047
Total common shareholders earnings, diluted	$ 112,034		$ 83,768		$ 189,974	$ 183,658
Weighted average common shares outstanding	149,872		149,986		149,864	149,875
Effect of dilutive common stock awards	1,416		884		1,446	1,027
Diluted weighted average common shares outstanding	151,288		150,870		151,310	150,903
Basic earnings per common share	$ 0.75		$ 0.56		$ 1.27	$ 1.23
Diluted earnings per common share	$ 0.74		$ 0.56		$ 1.26	$ 1.22