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
Statement of Comprehensive Income [Abstract]
Net income	$ 8,686	$ 25,035	$ 12,730	$ 43,254
Other comprehensive income (loss), net of tax:
Amortization of actuarial gains, net of taxes of $31 and ($5), respectively, and of $62 and ($3), respectively.	(69)	(11)	(138)	(15)
Amortization of prior service credits, net of taxes of ($4) and ($2) for the three and six months ended June 30, 2022, respectively.		(11)		(16)
Change in net unrealized gains on securities, net of taxes of $1,977 and $8,767, respectively, and of $93 and $19,659, respectively.	(4,404)	(20,434)	(417)	(43,861)
Net unrealized gains on cashflow hedges, net of taxes of ($2,836) and ($2,018), respectively, and of ($492) and ($8,876), respectively.	6,319	4,915	1,179	19,666
Change in fair value of liabilities related to instrument-specific credit risk, net of taxes of $36 and $142, respectively, and of $69 and $205, respectively.	(81)	(219)	(155)	(354)
Other comprehensive income (loss), net of tax:	1,765	(15,760)	469	(24,580)
Comprehensive net income	$ 10,451	$ 9,275	$ 13,199	$ 18,674