Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($) item segment	Mar. 31, 2022 USD ($)
Segment Reporting
Number of operating segments | segment	4
Number of banking offices | item	14
Key metrics related to segments
Net interest income (loss)	$ 23,658	$ 21,673
Provision for credit losses	550
Noninterest income	25,253	29,470
Noninterest expense	37,869	38,071
Net income (loss) before taxes	10,492	13,072
Corporate Administration
Key metrics related to segments
Net interest income (loss)	(654)	(561)
Noninterest income	38	29
Intercompany revenue (expense)	1,648	1,581
Noninterest expense	12,312	11,393
Net income (loss) before taxes	(11,280)	(10,344)
Banking | Operating Segments
Key metrics related to segments
Net interest income (loss)	24,151	21,525
Provision for credit losses	550
Noninterest income	2,822	1,538
Intercompany revenue (expense)	(3,047)	(1,159)
Noninterest expense	13,955	11,755
Net income (loss) before taxes	9,421	10,149
Retirement and Benefit Services | Operating Segments
Key metrics related to segments
Noninterest income	15,482	17,646
Intercompany revenue (expense)	1,341	(403)
Noninterest expense	7,303	8,080
Net income (loss) before taxes	9,520	9,163
Wealth Management | Operating Segments
Key metrics related to segments
Noninterest income	5,194	5,326
Intercompany revenue (expense)	(167)	(513)
Noninterest expense	1,518	1,329
Net income (loss) before taxes	3,509	3,484
Mortgage | Operating Segments
Key metrics related to segments
Net interest income (loss)	161	709
Noninterest income	1,717	4,931
Intercompany revenue (expense)	225	494
Noninterest expense	2,781	5,514
Net income (loss) before taxes	$ (678)	$ 620