Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Available-for-sale debt securities, amortized cost	$ 5,161,904	$ 7,825,435
Held-to-maturity debt securities, fair value	$ 404,822	$ 423,226
Common stock, par value (in shares)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	1,000,000,000	1,000,000,000
Common stock issued (in shares)	176,426,993	176,172,073
Common stock outstanding (in shares)	176,426,993	176,172,073