CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 37,303	$ 34,531
Other comprehensive income (loss):
Change in net unrealized loss during the period	(2,302)	(70,131)
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	757	170
Change in pension and other postretirement obligations:
Reclassification adjustment for expense included in other expense	(370)	(934)
Change in the net actuarial gain	221	997
Change in unrealized gain (loss) on derivatives:
Change in net unrealized (loss) gain during the period	(2,111)	6,852
Reclassification adjustment for expense included in interest expense	(313)	31
Other comprehensive loss before income taxes	(2,671)	(63,015)
Deferred tax expense (benefit)	1,588	(19,816)
Other comprehensive loss, net of tax	(4,259)	(43,199)
Total comprehensive income (loss)	$ 33,044	$ (8,668)