Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Investment securities:
Securities held to maturity, fair value (in dollars)	$ 1,820,473	$ 1,834,527
Shareholders' equity:
Common stock, par value (in dollars per share)	$ 2.5	$ 2.5
Common stock, shares authorized	160,000,000	160,000,000
Common stock, shares issued	101,479,065	76,322,206
Common stock, shares outstanding	101,479,065	76,322,206