Securities - Unrealized Gains (Losses) of Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Gross Unrealized Gains
Total unrealized gains (losses) on available-for-sale debt securities	$ 1,746	$ 261
Income tax (expense) benefit	(372)	(56)
Net Unrealized Gains (Losses), Net of Tax Included in Accumulated Other Comprehensive Income (Loss)	1,374	205
Gross Unrealized Losses
Total unrealized gains (losses) on available-for-sale debt securities	(83,751)	(102,582)
Income tax (expense) benefit	17,824	21,915
Net Unrealized Gains (Losses), Net of Tax Included in Accumulated Other Comprehensive Income (Loss)	(65,927)	(80,667)
Net Unrealized Losses
Total unrealized gains (losses) on available-for-sale debt securities	(82,005)	(102,321)
Income tax (expense) benefit	17,452	21,859
Net Unrealized Gains (Losses), Net of Tax Included in Accumulated Other Comprehensive Income (Loss)	$ (64,553)	$ (80,462)