Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share Reconciliation
Net income available to common shareholders	$ 117,340	$ 92,429	$ 229,878	$ 176,525
Basic weighted average number of common shares outstanding (in shares)	405,963,209	403,790,242	405,560,146	403,654,665
Plus: Common stock equivalents (in shares)	2,697,569	841,603	2,592,312	1,388,518
Diluted weighted average number of common shares outstanding (in shares)	408,660,778	404,631,845	408,152,458	405,043,183
Earnings per common share:
Basic (usd per share)	$ 0.29	$ 0.23	$ 0.57	$ 0.44
Diluted (usd per share)	$ 0.29	$ 0.23	$ 0.56	$ 0.44
Anti-dilutive common stock options and warrants (in shares)	0	2,700,000	0	2,300,000