Loans Held for Investment - Summary of Investment In Loans By Credit Quality Indicators by Year of Origin and Gross Charge-Offs (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
2024	$ 106,062	$ 144,580
2023	149,008	129,824
2022	123,770	60,684
2021	54,043	51,655
2020	45,919	24,366
Prior	126,191	119,146
Revolving Lines	126,365	136,363
Total	731,358	666,618
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	105,798	143,663
2023	146,041	126,693
2022	119,293	60,006
2021	52,894	49,089
2020	45,063	23,779
Prior	122,558	106,790
Revolving Lines	123,514	132,953
Total	715,161	642,973
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2024	190	27
2023	25	261
2022	1,683
2021		286
2020		208
Prior	1,467	9,489
Revolving Lines	141	1,347
Total	3,506	11,618
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024		890
2023	2,942	2,773
2022	2,794	653
2021	1,149	2,280
2020	856	379
Prior	2,166	2,721
Revolving Lines	2,557	1,853
Total	12,464	11,549
Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2024	74
2023		97
2022		25
Prior		146
Revolving Lines	153	210
Total	227	478
Gross charge-offs
Financing Receivable, Credit Quality Indicator [Line Items]
2024		27
2023	36	116
2022	313	38
2021	45	34
2020	231	64
Prior	178	83
Revolving Lines	562	1,445
Total	1,365	1,807
1-4 Family Residential
Financing Receivable, Credit Quality Indicator [Line Items]
2024	12,999	59,021
2023	65,251	73,774
2022	71,208	35,658
2021	32,784	23,123
2020	21,992	6,617
Prior	51,745	50,413
Revolving Lines		291
Total	255,979	248,897
1-4 Family Residential | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	12,999	58,213
2023	62,744	71,746
2022	68,516	35,005
2021	31,650	22,795
2020	21,852	6,493
Prior	49,706	47,727
Revolving Lines		291
Total	247,467	242,270
1-4 Family Residential | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2023		261
2022	259
Prior	34	95
Total	293	356
1-4 Family Residential | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024		808
2023	2,507	1,767
2022	2,433	653
2021	1,134	328
2020	140	124
Prior	2,005	2,591
Total	8,219	6,271
Residential Construction
Financing Receivable, Credit Quality Indicator [Line Items]
2024	15,082	14,585
2023	13,923	1,179
Total	29,005	15,764
Residential Construction | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	15,082	14,585
2023	13,923	1,179
Total	29,005	15,764
Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
2024	35,710	42,867
2023	46,151	43,365
2022	38,709	11,703
2021	11,404	19,314
2020	17,372	14,490
Prior	67,756	61,991
Revolving Lines	13,117	12,537
Total	230,219	206,267
Commercial Real Estate | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	35,710	42,867
2023	46,151	43,365
2022	38,709	11,703
2021	11,404	17,491
2020	17,372	14,490
Prior	67,608	52,597
Revolving Lines	13,117	12,537
Total	230,071	195,050
Commercial Real Estate | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Prior		9,394
Total		9,394
Commercial Real Estate | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2021		1,823
Prior	148
Total	148	1,823
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
2024	28,677	9,334
2023	4,877	2,543
2022	8,170	5,961
2021	8,280	4,872
2020	5,895	1,057
Prior	5,575	1,438
Revolving Lines	21,075	44,414
Total	82,549	69,619
Commercial | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	28,677	9,265
2023	4,483	2,120
2022	6,444	5,936
2021	8,280	4,457
2020	5,179	769
Prior	4,142	1,292
Revolving Lines	20,327	41,555
Total	77,532	65,394
Commercial | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2022	1,424
2021		286
2020		208
Prior	1,433
Revolving Lines	141	1,281
Total	2,998	1,775
Commercial | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024		69
2023	394	326
2022	302
2021		129
2020	716	80
Revolving Lines	454	1,405
Total	1,866	2,009
Commercial | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2023		97
2022		25
Prior		146
Revolving Lines	153	173
Total	153	441
Home Equity
Financing Receivable, Credit Quality Indicator [Line Items]
2024	4,012	10,399
2023	7,797	7,406
2022	1,742	6,218
2021	77	4,119
2020	64	2,036
Prior	1,100	5,248
Revolving Lines	90,979	62,905
Total	105,771	98,331
Home Equity | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	4,012	10,399
2023	7,797	6,726
2022	1,694	6,218
2021	77	4,119
2020	64	1,861
Prior	1,088	5,118
Revolving Lines	88,876	62,361
Total	103,608	96,802
Home Equity | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Lines		66
Total		66
Home Equity | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2023		680
2022	48
2020		175
Prior	12	130
Revolving Lines	2,103	441
Total	2,163	1,426
Home Equity | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Lines		37
Total		37
Other Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2024	9,582	8,374
2023	11,009	1,557
2022	3,941	1,144
2021	1,498	227
2020	596	166
Prior	15	56
Revolving Lines	1,194	16,216
Total	27,835	27,740
Other Consumer | Pass
Financing Receivable, Credit Quality Indicator [Line Items]
2024	9,318	8,334
2023	10,943	1,557
2022	3,930	1,144
2021	1,483	227
2020	596	166
Prior	14	56
Revolving Lines	1,194	16,209
Total	27,478	27,693
Other Consumer | Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
2024	190	27
2023	25
Total	215	27
Other Consumer | Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
2024		13
2023	41
2022	11
2021	15
Prior	1
Revolving Lines		7
Total	68	$ 20
Other Consumer | Doubtful
Financing Receivable, Credit Quality Indicator [Line Items]
2024	74
Total	$ 74