CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
CONSOLIDATED BALANCE SHEETS
Available-for-sale investment securities, amortized cost	$ 2,558,675	$ 3,549,599
Investment securities held-to-maturity	$ 3,574,856	$ 3,814,822
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	300,000,000	300,000,000
Common stock, issued (in shares)	141,340,539	140,963,918
Common stock outstanding (in shares)	127,618,761	127,363,327
Common stock repurchased (in shares)	13,721,778	13,600,591