Investment Securities - Allowance for Credit Losses HTM (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Beginning balance	$ 1,381	$ 1,132	$ 1,279	$ 2,915
Provision for credit loss expense	0	0	0	(1,183)
Net increase (decrease) in allowance on previously impaired securities	0		0	(600)
Recoveries	3	147	105	147
Ending balance	1,384	1,279	1,384	1,279
State and political subdivisions
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Beginning balance	103	871	1,197	2,307
Provision for credit loss expense	0	325	0	(1,111)
Net increase (decrease) in allowance on previously impaired securities	3		(1,180)	0
Recoveries	1	0	90	0
Ending balance	107	1,196	107	1,196
Other securities
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Beginning balance	1,278	261	82	608
Provision for credit loss expense	0	(325)	0	(72)
Net increase (decrease) in allowance on previously impaired securities	(3)		1,180	(600)
Recoveries	2	147	15	147
Ending balance	$ 1,277	$ 83	$ 1,277	$ 83