CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 38,485	$ 51,278	$ 73,016	$ 30,244
Other comprehensive income (loss):
Change in net unrealized gain (loss) during the period	(33,157)	8,966	(103,288)	(6,568)
Reclassification adjustment for net gains included in net gain on sale of securities and other assets		(20)		(1,207)
Accretion of net unrealized loss on securities transferred to held to maturity	829		999
Change in pension and other postretirement obligations:
Reclassification adjustment for expense included in other expense	(936)	(438)	(1,870)	(860)
Reclassification adjustment for curtailment loss				1,543
Change in the net actuarial gain	998	644	1,995	1,529
Change in unrealized gain (loss) on derivatives:
Change in net unrealized gain (loss) during the period	2,309	(1,406)	9,161	3,542
Reclassification adjustment for loss included in loss on termination of derivatives				16,505
Reclassification adjustment for expense included in interest expense	(54)	10	(23)	864
Other comprehensive (loss) income before income taxes	(30,011)	7,756	(93,026)	15,348
Deferred tax (benefit) expense	(9,441)	3,711	(29,257)	4,848
Total other comprehensive (loss) income, net of tax	(20,570)	4,045	(63,769)	10,500
Total comprehensive loss	$ 17,915	$ 55,323	$ 9,247	$ 40,744