Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Statement of Comprehensive Income [Abstract]
Net Income (Loss)	$ 53,633	$ 41,535
Net unrealized gains (losses) on available for sale securities and transferred securities:
Net unrealized holding gains (losses) arising during the period	24,450	(1,914)
Change in net unrealized holding loss on securities transferred to held to maturity	2,569	2,746
Reclassification adjustments for changes realized in net income:
Net change in prior service costs	3	21
Recognized net (gain) loss due to lump sum settlement	(38)	0
Change in net actuarial loss	54	71
Derivatives:
Change in the accumulated gain (loss) on effective cash flow hedge derivatives	5,909	(11,970)
Reclassification adjustment for (gain) loss realized in net income	2,010	3,615
Other comprehensive income (loss), net of tax	34,957	(7,431)
Comprehensive income (loss)	$ 88,590	$ 34,104