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	$ 20,085	$ 23,401
Change in available-for-sale and transferred securities:
Unrealized holding gain (loss) on securities available-for-sale arising during the period	2,815	(15,389)
Reclassification adjust for amortization of unrealized losses on securities transferred to held-to-maturity	490	496
Reclassification adjustment for (gains) losses included in net income	0	46
Net securities gain (loss) activity during the period	3,305	(14,847)
Tax effect	(694)	3,118
Net of tax amount	2,611	(11,729)
Defined benefit pension plans:
Amortization of net actuarial loss	13	15
Net gain activity during the period	13	15
Tax effect	(3)	(4)
Net of tax amount	10	11
Total other comprehensive income (loss), net of tax	2,621	(11,718)
Comprehensive income	$ 22,706	$ 11,683