Summary of Significant Accounting Policies - Calculation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Common Share:
Net income available to common shareholders	$ 461,152	$ 377,918	$ 297,105
Basic weighted-average number of common shares outstanding (in shares)	407,445,379	403,754,356	337,792,270
Plus: Common stock equivalents (in shares)	2,572,949	1,291,851	2,325,538
Diluted weighted-average number of common shares outstanding (in shares)	410,018,328	405,046,207	340,117,808
Earnings per common share:
Basic (in USD per share)	$ 1.13	$ 0.94	$ 0.88
Diluted (in USD per share)	$ 1.12	$ 0.93	$ 0.87