Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Statement of Financial Position [Abstract]
Securities, Available-for-sale, Amortized Cost	$ 5,463,186	$ 6,152,348	$ 6,546,471
Loans held-for-sale, fair value	$ 11,908	$ 10,497	$ 15,892
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000	200,000,000
Common stock, shares issued	142,677,069	142,657,871	142,628,163
Treasury stock, shares	926,723	929,210	933,152