CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Debt Securities, Held-to-maturity, Fair Value	$ 70,850	$ 71,688
Debt Securities, Available-for-sale, Amortized Cost	$ 3,221,380	$ 3,382,604
Common Stock, No Par Value	$ 0	$ 0
Common Stock, Shares Authorized	160,000,000	160,000,000
Common Stock, Shares, Issued	104,281,794	104,281,794
Treasury Stock, Common, Shares	8,808,199	9,140,550