Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Statement Of Financial Position [Abstract]
Available for sale securities, amortized cost	$ 11,453,157	$ 8,407,676
Held to maturity securities, allowance for credit losses	4,566	2,645
Held to Maturity, Fair value	$ 5,107,059	$ 4,748,938
Preferred stock, par value	$ 0.01
Preferred stock, shares authorized	11,500
Preferred stock, shares issued	11,500
Preferred stock, shares outstanding	11,500
Common stock, par value	$ 1	$ 1
Common stock, shares authorized	160,000,000	160,000,000
Common stock, shares issued	78,665,809	78,665,809
Common stock, shares outstanding	75,917,456	48,814,177
Treasury stock, shares	2,748,383	6,242,553