CONDENSED CONSOLIDATED STATEMENTS OF CONDITION - UNAUDITED - (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Held-to-maturity debt securities	$ 192,798	$ 200,411
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	44,940,147	44,913,561
Common stock, shares outstanding (in shares)	44,940,147	44,913,561