Business Combinations - Pro Forma Results (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Net interest and other income	$ 155,224	$ 129,631
Net income	$ 36,971	$ 25,394	$ 30,741
Earnings Per Share, Basic (in USD per share)	$ 6.72	$ 4.53	$ 5.33
Earnings Per Share, Diluted (in USD per share)	$ 6.62	$ 4.49	$ 5.27
Weighted Average Shares Outstanding, Basic (in shares)	5,502,797	5,601,471	5,765,088
Weighted Average Shares Outstanding, Diluted (in shares)	5,583,983	5,661,460	5,829,412
Sallyport Commercial Finance
Business Acquisition [Line Items]
Weighted Average Shares Outstanding, Basic (in shares)	5,502,797	5,601,471
Weighted Average Shares Outstanding, Diluted (in shares)	5,583,983	5,661,460
Pro Forma Adjustments	$ (1,201)	$ (2,063)
Net interest and other income	168,124	145,030
Net income	$ 39,994	$ 30,589
Earnings Per Share, Basic (in USD per share)	$ 7.27	$ 5.46
Earnings Per Share, Diluted (in USD per share)	$ 7.16	$ 5.40
Sallyport Commercial Finance
Business Acquisition [Line Items]
Net interest and other income	$ 12,900	$ 15,399
Net income	$ 4,224	$ 7,258