Segment Reporting (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment item	Jun. 30, 2022 USD ($)
Segment Reporting
Number of operating segments | segment			4
Number of banking offices | item			14
Key metrics related to segments
Net interest income (loss)	$ 22,234	$ 22,776	$ 45,892	$ 44,449
Provision for credit losses			550
Noninterest income	25,778	29,226	51,031	58,696
Noninterest expense	36,373	39,984	74,242	78,055
Net income (loss) before taxes	11,639	12,018	22,131	25,090
Corporate Administration
Key metrics related to segments
Net interest income (loss)	(665)	(561)	(1,320)	(1,122)
Noninterest income	198	6	235	35
Intercompany revenue (expense)	1,573	1,737	3,221	3,319
Noninterest expense	10,553	12,665	22,859	24,334
Net income (loss) before taxes	(9,447)	(11,483)	(20,723)	(22,102)
Banking | Operating Segments
Key metrics related to segments
Net interest income (loss)	22,681	22,779	46,832	44,304
Provision for credit losses			550
Noninterest income	1,336	1,341	4,158	2,879
Intercompany revenue (expense)	(2,933)	(3,829)	(5,980)	(4,988)
Noninterest expense	11,548	11,790	25,503	23,325
Net income (loss) before taxes	9,536	8,501	18,957	18,870
Retirement and Benefit Services | Operating Segments
Key metrics related to segments
Noninterest income	15,890	16,293	31,372	33,939
Intercompany revenue (expense)	1,331	1,095	2,672	692
Noninterest expense	8,290	7,693	15,600	15,722
Net income (loss) before taxes	8,931	9,695	18,444	18,909
Wealth Management | Operating Segments
Key metrics related to segments
Noninterest income	5,449	5,548	10,644	10,874
Intercompany revenue (expense)	(257)	(337)	(425)	(851)
Noninterest expense	2,100	1,293	3,613	2,617
Net income (loss) before taxes	3,092	3,918	6,606	7,406
Mortgage | Operating Segments
Key metrics related to segments
Net interest income (loss)	218	558	380	1,267
Noninterest income	2,905	6,038	4,622	10,969
Intercompany revenue (expense)	286	1,334	512	1,828
Noninterest expense	3,882	6,543	6,667	12,057
Net income (loss) before taxes	$ (473)	$ 1,387	$ (1,153)	$ 2,007