Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share Reconciliation
Net income available to common shareholders	$ 112,538	$ 84,096
Basic weighted average number of common shares outstanding (in shares)	405,152,605	403,519,088
Plus: Common stock equivalents (in shares)	2,484,160	1,905,035
Diluted weighted average number of common shares outstanding (in shares)	407,636,765	405,424,123
Earnings per common share:
Basic (usd per share)	$ 0.28	$ 0.21
Diluted (usd per share)	$ 0.28	$ 0.21
Anti-dilutive common stock options and warrants (in shares)	0	1,900,000