Segments - Schedule of Financial Information (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Cash and cash equivalents	$ 255,565	$ 205,332
Goodwill	25,969	21,126	$ 0
Intangible assets	14,771	15,817
Other segment assets	3,309,902	2,964,636
Total assets	3,606,207	3,206,911
Other Intangible Assets
Segment Reporting Information [Line Items]
Intangible assets	13,246	14,072
Core deposits intangible
Segment Reporting Information [Line Items]
Intangible assets	1,525	1,745
Commercial Bank
Segment Reporting Information [Line Items]
Cash and cash equivalents	242,149	193,860
Goodwill	22,448	17,605
Other segment assets	3,141,201	2,820,579
Total assets	3,407,326	3,033,792
Commercial Bank \| Other Intangible Assets
Segment Reporting Information [Line Items]
Intangible assets	3	3
Commercial Bank \| Core deposits intangible
Segment Reporting Information [Line Items]
Intangible assets	1,525	1,745
Open Sky
Segment Reporting Information [Line Items]
Cash and cash equivalents	8,039	7,890
Goodwill	0	0
Other segment assets	132,875	118,023
Total assets	140,914	125,913
Open Sky \| Other Intangible Assets
Segment Reporting Information [Line Items]
Intangible assets	0	0
Open Sky \| Core deposits intangible
Segment Reporting Information [Line Items]
Intangible assets	0	0
Windsor AdvantageTM
Segment Reporting Information [Line Items]
Cash and cash equivalents	5,377	3,582
Goodwill	3,521	3,521
Other segment assets	3,852	4,343
Total assets	25,993	25,515
Windsor AdvantageTM \| Other Intangible Assets
Segment Reporting Information [Line Items]
Intangible assets	13,243	14,069
Windsor AdvantageTM \| Core deposits intangible
Segment Reporting Information [Line Items]
Intangible assets	0	0
CBHL
Segment Reporting Information [Line Items]
Cash and cash equivalents	0	0
Goodwill	0	0
Other segment assets	31,974	21,691
Total assets	31,974	21,691
CBHL \| Other Intangible Assets
Segment Reporting Information [Line Items]
Intangible assets	0	0
CBHL \| Core deposits intangible
Segment Reporting Information [Line Items]
Intangible assets	$ 0	$ 0

Capital Bancorp Inc 10-K