CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net Income (Loss)	$ 27,498	$ 38,485	$ 64,801	$ 73,016
Other comprehensive income (loss):
Change in net unrealized loss during the period	(11,291)	(33,157)	(13,593)	(103,288)
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	796	829	1,553	999
Change in pension and other postretirement obligations:
Reclassification adjustment for expense included in other expense	(370)	(936)	(740)	(1,870)
Change in the net actuarial gain	814	998	1,035	1,995
Change in unrealized gain (loss) on derivatives:
Change in net unrealized gain (loss) during the period	1,586	2,309	(525)	9,161
Reclassification adjustment for expense included in interest expense	299	(54)	(14)	(23)
Other comprehensive loss before income taxes	(8,166)	(30,011)	(10,837)	(93,026)
Deferred tax expense	(2,419)	(9,441)	(831)	(29,257)
Other comprehensive loss, net of tax	(5,747)	(20,570)	(10,006)	(63,769)
Total comprehensive income	$ 21,751	$ 17,915	$ 54,795	$ 9,247