Equity and Earnings Per Common Share - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Equity and Earnings Per Common Share
Net income	$ 79,395	$ 80,040	$ 80,223	$ 83,441	$ 159,435	$ 163,664
Less preferred stock dividends	(137)		(137)		(275)	(275)
Net income (loss) available to common shareholders	$ 79,258		$ 80,086		$ 159,160	$ 163,389
Net income per share-basic (in dollars per share)	$ 0.17		$ 0.17		$ 0.33	$ 0.34
Net income per share-diluted (in dollars per share)	$ 0.17		$ 0.17		$ 0.33	$ 0.34
Basic weighted average common shares outstanding	478,317		477,290		477,983	477,071
Weighted average common shares outstanding-diluted	480,270		479,530		480,329	479,382