Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share Reconciliation
Net income available to common shareholders	$ 78,719	$ 66,387	$ 262,173	$ 174,810
Basic weighted average number of common shares outstanding (in shares)	331,797,982	331,486,500	331,716,652	331,180,213
Plus: Common stock equivalents (in shares)	1,607,214	1,513,742	1,322,784	1,513,867
Diluted weighted average number of common shares outstanding (in shares)	333,405,196	333,000,242	333,039,436	332,694,080
Earnings per common share:
Basic (usd per share)	$ 0.24	$ 0.20	$ 0.79	$ 0.53
Diluted (usd per share)	$ 0.24	$ 0.20	$ 0.79	$ 0.53
Anti-dilutive common stock options and warrants (in shares)	265,000	2,900,000	475,000	3,300,000