CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
CONSOLIDATED BALANCE SHEETS (Unaudited)
Available-for-sale investment securities, amortized cost	$ 2,466,109	$ 2,558,675
Investment securities held-to-maturity	$ 3,470,710	$ 3,574,856
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)	141,687,612	141,340,539
Common stock outstanding (in shares)	127,841,908	127,618,761
Common stock repurchased (in shares)	13,845,704	13,721,778