v3.25.4
Segment Reporting - Schedule of Segment Data (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Disclosure [Line Items]      
Total interest income $ 315,320 $ 290,702 $ 251,040
Total interest expense 98,427 88,167 62,946
Net interest income 216,893 202,535 188,094
Provision (benefit) for credit losses 89,822 76,502 37,810
Net interest income after allowance for credit losses 127,071 126,033 150,284
Other income 37,993 11,330 11,320
Operating expenses (85,179) (74,427) (75,568)
Income (loss) before income taxes 79,885 62,936 86,036
Income tax (provision) benefit (24,544) (21,011) (24,910)
Net income after taxes 55,341 41,925 61,126
Income attributable to the non-controlling interest 8,782 6,047 6,047
Less:redemption of Series F preferred stock - funds paid in excess of carrying value 3,515 0 0
Net income (loss) attributable to Medallion Financial Corp. 43,044 35,878 55,079
Balance Sheet Data      
Total loans, gross 2,436,916 2,265,428  
Loans 2,566,849 2,491,022 [1] 2,215,886
Total assets 2,955,464 2,868,606 2,587,827
Total funds borrowed $ 2,403,916 $ 2,379,413 $ 2,118,690
Selected Financial Ratios      
Return on average assets 1.93% 1.54% 2.51%
Return on average stockholders' equity 11.06% 10.12% 17.33%
Return on average equity 11.43% 9.89% 15.79%
Interest yield 11.74% 11.58% 11.19%
Net interest margin, gross 8.06% 8.05% 8.38%
Net interest margin, net of allowance 8.40% 8.35% 8.68%
Reserve coverage 4.50% 4.12% [2] 3.80% [3]
Delinquency status 0.97% 1.13% [4] 0.77% [5]
Charge-off (recovery) ratio 2.88% 2.69% 1.48% [6]
Recreation [Member]      
Selected Financial Ratios      
Charge-off (recovery) ratio 3.95%    
Operating Segments [Member] | Consumer Lending [Member] | Recreation [Member]      
Segment Reporting Disclosure [Line Items]      
Total interest income $ 209,321 $ 194,131 $ 167,765
Total interest expense 51,966 46,123 31,436
Net interest income 157,355 148,008 136,329
Provision (benefit) for credit losses 73,908 67,995 44,592
Net interest income after allowance for credit losses 83,447 80,013 91,737
Other income 1,937 756 376
Operating expenses (40,567) (33,128) (32,601)
Income (loss) before income taxes 44,817 47,641 59,512
Income tax (provision) benefit (13,770) (15,181) (17,231)
Net income after taxes 31,047 32,460 42,281
Balance Sheet Data      
Total loans, gross 1,617,221 1,543,243 [1] 1,336,222
Total assets 1,552,257 1,494,445 1,297,870
Total funds borrowed $ 1,262,575 $ 1,239,592 $ 1,062,584
Selected Financial Ratios      
Return on average assets 2.05% 2.29% 3.36%
Return on average equity 12.00% 15.11% 21.24%
Interest yield 13.37% 13.30% 13.07%
Net interest margin, gross 10.05% 10.14% 10.62%
Net interest margin, net of allowance 10.56% 10.58% 11.09%
Reserve coverage 5.32% 5.00% [2] 4.31% [3]
Delinquency status 0.82% 0.67% [4] 0.70% [5]
Charge-off (recovery) ratio 3.77% 3.72% 3.04% [6]
Operating Segments [Member] | Consumer Lending [Member] | Home Improvement [Member]      
Segment Reporting Disclosure [Line Items]      
Total interest income $ 80,624 $ 74,036 $ 62,703
Total interest expense 28,931 26,277 18,137
Net interest income 51,693 47,759 44,566
Provision (benefit) for credit losses 10,181 13,458 17,583
Net interest income after allowance for credit losses 41,512 34,301 26,983
Other income 12 11 6
Operating expenses (19,246) (15,586) (16,752)
Income (loss) before income taxes 22,278 18,726 10,237
Income tax (provision) benefit (6,845) (5,967) (2,964)
Net income after taxes 15,433 12,759 7,273
Balance Sheet Data      
Total loans, gross 810,237 827,211 [1] 760,621
Total assets 796,254 811,442 744,904
Total funds borrowed $ 647,657 $ 673,064 $ 609,863
Selected Financial Ratios      
Return on average assets 1.94% 1.66% 1.04%
Return on average equity 11.36% 10.76% 6.60%
Interest yield 9.95% 9.45% 8.86%
Net interest margin, gross 6.38% 6.09% 6.29%
Net interest margin, net of allowance 6.54% 6.24% 6.45%
Reserve coverage 2.41% 2.48% [2] 2.76% [3]
Delinquency status 0.16% 0.17% [4] 0.20% [5]
Charge-off (recovery) ratio 1.38% 1.78% 1.33% [6]
Operating Segments [Member] | Commercial Lending [Member]      
Segment Reporting Disclosure [Line Items]      
Total interest income $ 15,904 $ 14,007 $ 12,719
Total interest expense 4,824 4,294 3,597
Net interest income 11,080 9,713 9,122
Provision (benefit) for credit losses 9,027 1,093 1,988
Net interest income after allowance for credit losses 2,053 8,620 7,134
Other income 25,249 7,860 5,971
Operating expenses (6,201) (4,992) (3,547)
Income (loss) before income taxes 21,101 11,488 9,558
Income tax (provision) benefit (6,497) (3,661) (2,767)
Net income after taxes 14,604 7,827 6,791
Balance Sheet Data      
Total loans, gross 123,068 111,273 [1] 114,827
Total assets 115,601 106,258 110,850
Total funds borrowed $ 94,028 $ 88,137 $ 90,754
Selected Financial Ratios      
Return on average assets 12.80% 7.38% 6.65%
Return on average equity 76.06% 47.93% 41.51%
Interest yield 13.00% 12.71% 12.80%
Net interest margin, gross 9.09% 8.81% 9.18%
Net interest margin, net of allowance 9.78% 9.18% 9.45%
Reserve coverage 7.36% 4.66% [2] 3.61% [3]
Delinquency status 8.34% 14.66% [4] 5.40% [5]
Charge-off (recovery) ratio 4.22% 0.04% 1.02% [6]
Operating Segments [Member] | Taxi Medallion Lending [Member]      
Segment Reporting Disclosure [Line Items]      
Total interest income $ 432 $ 659 $ 1,596
Total interest expense 73 102 72
Net interest income 359 557 1,524
Provision (benefit) for credit losses (3,294) (6,035) (26,318)
Net interest income after allowance for credit losses 3,653 6,592 27,842
Other income 4,671 910 3,358
Operating expenses (3,647) (4,573) (7,256)
Income (loss) before income taxes 4,677 2,929 23,944
Income tax (provision) benefit (1,438) (933) (6,933)
Net income after taxes 3,239 1,996 17,011
Balance Sheet Data      
Total loans, gross 1,179 1,909 [1] 3,663
Total assets 4,329 6,573 12,247
Total funds borrowed 3,521 $ 5,452 $ 10,027
Selected Financial Ratios      
Return on average assets   24.25% 91.25%
Return on average equity   151.76% 574.86%
Interest yield   23.39% 26.94%
Net interest margin, gross   16.99% 25.73%
Net interest margin, net of allowance   28.15% 61.60%
Reserve coverage   28.29% [2] 41.93% [3]
Delinquency status   0.00% [4] 0.00% [5]
Charge-off (recovery) ratio   (153.72%) (309.96%) [6]
Intersegment Eliminations [Member]      
Segment Reporting Disclosure [Line Items]      
Total interest income 9,039 $ 7,869 $ 6,257
Total interest expense 12,633 11,371 9,704
Net interest income (3,594) (3,502) (3,447)
Provision (benefit) for credit losses 0 (9) (35)
Net interest income after allowance for credit losses (3,594) (3,493) (3,412)
Other income 6,124 1,793 1,609
Operating expenses (15,518) (16,148) (15,412)
Income (loss) before income taxes (12,988) (17,848) (17,215)
Income tax (provision) benefit 4,006 4,731 4,985
Net income after taxes (8,982) (13,117) (12,230)
Balance Sheet Data      
Total loans, gross 15,144 7,386 [1] 553
Total assets 487,023 449,888 421,956
Total funds borrowed $ 396,135 $ 373,168 $ 345,462
Selected Financial Ratios      
Return on average assets   (2.95%) (3.13%)
Return on average equity   (18.94%) (19.78%)
[1] Inclusive of recreation and strategic partnership loans held for sale, at lower of amortized cost or fair value.
[2] Allowance for credit loss as a percent of gross loans held for investment and excludes loans held for sale.
[3] Allowance for credit loss as a percent of gross loans.
[4] Loans 90 days or more past due as a percent of total gross loans.

(5) Net charge-offs as a percent of annual average gross loans.
[5] Loans 90 days or more past due as a percent of total gross loans.
[6] Net charge-offs as a percent of annual average gross loans.