CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)
Net income	$ 17,691	$ 37,303
Other comprehensive income (loss):
Change in net unrealized gain (loss) during the period	3,344	(2,302)
Reclassification adjustment for net losses included in net loss on sale of securities and other assets		1,447
Accretion of net unrealized loss on securities transferred to held-to-maturity	718	757
Change in pension and other postretirement obligations:
Reclassification adjustment for expense included in other expense	(317)	(370)
Change in the net actuarial gain	520	221
Change in unrealized gain (loss) on derivatives:
Change in net unrealized gain (loss) during the period	2,145	(2,111)
Reclassification adjustment for expense included in interest expense	2,435	(313)
Other comprehensive income (loss) before income taxes	8,845	(2,671)
Deferred tax expense	2,732	1,588
Total other comprehensive income (loss), net of tax	6,113	(4,259)
Total comprehensive income	$ 23,804	$ 33,044