UNAUDITED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Available-for-sale debt securities, amortized cost	$ 4,893,056	$ 5,161,904
Held-to-maturity debt securities, fair value	$ 385,398	$ 404,822
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock issued (in shares)	176,687,829	176,426,993
Common stock outstanding (in shares)	176,687,829	176,426,993