Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share Reconciliation
Net income available to common shareholders	$ 119,408	$ 99,202	$ 349,286	$ 275,727
Basic weighted average number of common shares outstanding (in shares)	406,824,160	403,833,469	405,986,114	403,714,701
Plus: Common stock equivalents (in shares)	2,413,841	955,057	2,523,653	1,197,425
Diluted weighted average number of common shares outstanding (in shares)	409,238,001	404,788,526	408,509,767	404,912,126
Earnings per common share:
Basic (usd per share)	$ 0.29	$ 0.25	$ 0.86	$ 0.68
Diluted (usd per share)	$ 0.29	$ 0.25	$ 0.86	$ 0.68
Anti-dilutive common stock options and warrants (in shares)	0	4,900,000	0	2,200,000