Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) segment	Jun. 30, 2024 USD ($) segment
Segment Reporting [Abstract]
Number of reportable segments | segment			2	1
Segment Reporting Information [Line Items]
Interest income	$ 23,911	$ 23,556	$ 47,369	$ 47,608
Interest expense	7,769	9,384	15,933	18,688
Net interest income	16,142	14,172	31,436	28,920
Release of provision for credit losses	(51)	457	(391)	227
Operating expenses
Salaries and employee benefits	6,703	6,724	13,615	13,454
Occupancy, furniture and equipment expense	1,015	968	2,209	2,074
Processing, network, and bank card expense	1,443	1,362	2,844	2,732
Legal, examination, and professional fees	428	512	921	1,335
Depreciation	605	462	1,140	925
Other	2,075	2,006	4,039	4,089
Total expenses	12,269	12,034	24,768	24,609
Other
Non-interest income	3,545	3,996	7,008	7,015
Investment securities losses, net	(1)	(15)	(3)	(15)
Income taxes	1,367	1,033	2,580	1,999
Net income	6,101	4,629	11,484	9,085
Segment assets			1,877,417	1,847,810
Non-Bank
Segment Reporting Information [Line Items]
Interest income	26	29	52	59
Interest expense	855	985	1,708	1,975
Net interest income	(829)	(956)	(1,656)	(1,916)
Release of provision for credit losses	0	0	0	0
Operating expenses
Salaries and employee benefits	281	312	640	649
Occupancy, furniture and equipment expense	0	0	0	0
Processing, network, and bank card expense	0	0	0	0
Legal, examination, and professional fees	86	108	184	220
Depreciation	0	0	0	0
Other	243	217	453	409
Total expenses	610	637	1,277	1,278
Other
Non-interest income	519	313	880	599
Investment securities losses, net	0	0	0	0
Income taxes	(193)	(268)	(431)	(545)
Net income	(727)	(1,012)	(1,622)	(2,050)
Segment assets			10,998	7,559
Hawthorn Bank | Operating Segments
Segment Reporting Information [Line Items]
Interest income	23,885	23,527	47,317	47,549
Interest expense	6,914	8,399	14,225	16,713
Net interest income	16,971	15,128	33,092	30,836
Release of provision for credit losses	(51)	457	(391)	227
Operating expenses
Salaries and employee benefits	6,089	6,412	12,310	12,805
Occupancy, furniture and equipment expense	992	968	2,171	2,074
Processing, network, and bank card expense	1,425	1,362	2,808	2,732
Legal, examination, and professional fees	342	404	737	1,115
Depreciation	605	462	1,140	925
Other	1,801	1,789	3,540	3,680
Total expenses	11,254	11,397	22,706	23,331
Other
Non-interest income	2,484	3,683	5,074	6,416
Investment securities losses, net	(1)	(15)	(3)	(15)
Income taxes	1,560	1,301	3,011	2,544
Net income	6,691	$ 5,641	12,837	11,135
Segment assets			1,866,399	$ 1,840,251
Wealth Management | Operating Segments
Segment Reporting Information [Line Items]
Interest income	0		0
Interest expense	0		0
Net interest income	0		0
Release of provision for credit losses	0		0
Operating expenses
Salaries and employee benefits	333		665
Occupancy, furniture and equipment expense	23		38
Processing, network, and bank card expense	18		36
Legal, examination, and professional fees	0		0
Depreciation	0		0
Other	31		46
Total expenses	405		785
Other
Non-interest income	542		1,054
Investment securities losses, net	0		0
Income taxes	0		0
Net income	$ 137		269
Segment assets			$ 20