Earnings Per Share ("EPS") (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income applicable to common shares	$ 47,663
Average number of common shares outstanding used to calculated basic earnings per common share (in shares)	186,758,154
Less: Average unallocated ESOP shares (in shares)	(14,709,110)
Average number of common shares outstanding used to calculated basic earnings per common share (in shares)	172,049,044	0
Common stock equivalents (in shares)	0
Average number of common shares outstanding used to calculate diluted earnings per common share (in shares)	172,049,044
Earnings per common share
Basic and diluted (in dollars per share)	$ 0.28