XML 106 R92.htm IDEA: XBRL DOCUMENT
v3.20.4

Segment Reporting - Schedule of Segment Data (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |
Total interest income |  | $ 96,803 | $ 144,962 |  | $ 132,562 |  |  |
Total interest expense |  | 24,816 | 34,151 |  | 35,045 |  |  |
Net interest income/net investment income |  | 71,987 | 110,811 |  | 97,517 |  | $ 72,469 | [1]
Provision for loan losses |  | 59,008 | 69,817 |  | 47,386 |  | 59,008 | [1]
Net interest income after provision for loan losses |  | 12,979 | 40,994 |  | 50,131 |  | 13,461 | [1]
Sponsorship and race winnings |  | 14,368 | 20,042 |  | 18,742 |  | 14,368 | [1]
Race team related expenses |  | (7,121) | (8,366) |  | (8,996) |  | (7,121) | [1]
Other income (expense), net |  | (27,382) | (89,651) |  | (57,540) |  |  |
Income (loss) before income taxes/net investment loss before taxes |  | (7,156) | (36,981) |  | 2,337 |  | (10,722) | [1],[2]
Income tax (provision) benefit |  | (709) | 10,074 |  | (341) |  | (69) |
Net income (loss) after taxes/net increase (decrease) on net assets resulting from operations |  | (7,865) | (26,907) |  | 1,996 |  | (22,739) | [1]
Balance Sheet Data |  |  |  |  |  |  |  |
Total loans net |  | 981,487 | 1,172,290 |  | 1,114,762 |  | 981,487 |
Total assets |  | 1,381,846 | 1,642,411 |  | 1,541,667 |  | 1,381,846 |
Total funds borrowed |  | $ 1,062,028 | $ 1,312,255 |  | $ 1,169,593 |  | 1,062,028 |
Selected Financial Ratios |  |  |  |  |  |  |  |
Return on average assets |  | (0.90%) | (2.16%) |  | (0.12%) |  |  |
Return on average equity |  | (4.62%) | (10.90%) |  | (0.59%) |  |  |
Interest yield |  | 10.98% | 11.32% |  | 11.75% |  |  |
Net interest margin |  | 8.19% | 8.65% |  | 8.64% |  |  |
Reserve coverage |  | 3.58% | 4.68% |  | 3.97% |  |  |
Delinquency status | [3] | 2.14% | 0.57% |  | 0.76% |  |  |
Charge-off ratio |  | 2.73% | 5.00% |  | 3.60% |  |  |
RPAC [Member] |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |
Total interest expense |  | $ 121 | $ 163 |  | $ 159 |  |  |
Net interest income/net investment income |  | (121) | (163) |  | (159) |  |  |
Net interest income after provision for loan losses |  | (121) | (163) |  | (159) |  |  |
Sponsorship and race winnings |  | 14,368 | 20,042 |  | 18,742 |  |  |
Race team related expenses |  | (7,121) | (8,366) |  | (8,996) |  |  |
Other income (expense), net |  | (11,476) | (7,973) |  | (6,942) |  |  |
Income (loss) before income taxes/net investment loss before taxes |  | (4,350) | 3,540 |  | 2,645 |  |  |
Income tax (provision) benefit |  | 1,108 | (889) |  | (329) |  |  |
Net income (loss) after taxes/net increase (decrease) on net assets resulting from operations |  | (3,242) | 2,651 |  | 2,316 |  |  |
Balance Sheet Data |  |  |  |  |  |  |  |
Total assets |  | 29,925 | 33,711 |  | 31,538 |  | 29,925 |
Total funds borrowed |  | $ 7,649 | $ 8,689 |  | $ 7,794 |  | 7,649 |
Selected Financial Ratios |  |  |  |  |  |  |  |
Return on average assets |  | (11.69%) | 7.98% |  | 7.28% |  |  |
Return on average equity |  |  | (363.66%) |  | (96.37%) |  |  |
Operating Segments [Member] | Consumer Lending [Member] | Recreation [Member] |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |
Total interest income |  | $ 68,870 | $ 110,706 |  | $ 99,463 |  |  |
Total interest expense |  | 6,986 | 13,013 |  | 13,304 |  |  |
Net interest income/net investment income |  | 61,884 | 97,693 |  | 86,159 |  |  |
Provision for loan losses |  | 15,118 | 23,736 |  | 28,638 |  |  |
Net interest income after provision for loan losses |  | 46,766 | 73,957 |  | 57,521 |  |  |
Other income (expense), net |  | (14,242) | (27,341) |  | (23,490) |  |  |
Income (loss) before income taxes/net investment loss before taxes |  | 32,524 | 46,616 |  | 34,031 |  |  |
Income tax (provision) benefit |  | (8,579) | (12,004) |  | (8,813) |  |  |
Net income (loss) after taxes/net increase (decrease) on net assets resulting from operations |  | 23,945 | 34,612 |  | 25,218 |  |  |
Balance Sheet Data |  |  |  |  |  |  |  |
Total loans net |  | 580,182 | 765,338 |  | 695,257 |  | 580,182 |
Total assets |  | 590,746 | 777,605 |  | 707,377 |  | 590,746 |
Total funds borrowed |  | $ 434,527 | $ 621,735 |  | $ 563,805 |  | 434,527 |
Selected Financial Ratios |  |  |  |  |  |  |  |
Return on average assets |  | 5.48% | 4.59% |  | 3.84% |  |  |
Return on average equity |  | 22.60% | 22.93% |  | 17.19% |  |  |
Interest yield |  | 15.78% | 14.90% |  | 15.39% |  |  |
Net interest margin |  | 14.18% | 13.15% |  | 13.33% |  |  |
Reserve coverage |  | 1.17% | 3.45% |  | 2.53% |  |  |
Delinquency status | [3] | 0.73% | 0.70% |  | 0.84% |  |  |
Charge-off ratio |  | 1.89% | 1.95% |  | 2.69% |  |  |
Operating Segments [Member] | Consumer Lending [Member] | Home Improvement [Member] |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |
Total interest income |  | $ 12,799 | $ 27,273 |  | $ 19,943 |  |  |
Total interest expense |  | 2,290 | 5,699 |  | 4,757 |  |  |
Net interest income/net investment income |  | 10,509 | 21,574 |  | 15,186 |  |  |
Provision for loan losses |  | 2,453 | 3,778 |  | 1,598 |  |  |
Net interest income after provision for loan losses |  | 8,056 | 17,796 |  | 13,588 |  |  |
Other income (expense), net |  | (3,093) | (9,611) |  | (7,520) |  |  |
Income (loss) before income taxes/net investment loss before taxes |  | 4,963 | 8,185 |  | 6,068 |  |  |
Income tax (provision) benefit |  | (1,319) | (2,108) |  | (1,572) |  |  |
Net income (loss) after taxes/net increase (decrease) on net assets resulting from operations |  | 3,644 | 6,077 |  | 4,496 |  |  |
Balance Sheet Data |  |  |  |  |  |  |  |
Total loans net |  | 181,359 | 328,876 |  | 244,716 |  | 181,359 |
Total assets |  | 188,892 | 340,494 |  | 252,704 |  | 188,892 |
Total funds borrowed |  | $ 143,815 | $ 272,284 |  | $ 201,605 |  | 143,815 |
Selected Financial Ratios |  |  |  |  |  |  |  |
Return on average assets |  | 2.56% | 2.07% |  | 2.20% |  |  |
Return on average equity |  | 11.30% | 10.35% |  | 10.22% |  |  |
Interest yield |  | 9.06% | 9.66% |  | 9.50% |  |  |
Net interest margin |  | 7.44% | 7.62% |  | 7.24% |  |  |
Reserve coverage |  | 0.98% | 1.54% |  | 1.05% |  |  |
Delinquency status | [3] | 0.07% | 0.05% |  | 0.07% |  |  |
Charge-off ratio |  | 0.46% | 0.44% |  | 0.37% |  |  |
Operating Segments [Member] | Commercial Lending [Member] |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |
Total interest income |  | $ 7,076 | $ 6,926 |  | $ 7,183 |  |  |
Total interest expense |  | 1,502 | 2,538 |  | 2,833 |  |  |
Net interest income/net investment income |  | 5,574 | 4,388 |  | 4,350 |  |  |
Provision for loan losses |  |  |  |  | 364 |  |  |
Net interest income after provision for loan losses |  | 5,574 | 4,388 |  | 3,986 |  |  |
Other income (expense), net |  | (1,824) | (3,196) |  | (1,149) |  |  |
Income (loss) before income taxes/net investment loss before taxes |  | 3,750 | 1,192 |  | 2,837 |  |  |
Income tax (provision) benefit |  | (862) | (299) |  | (684) |  |  |
Net income (loss) after taxes/net increase (decrease) on net assets resulting from operations |  | 2,888 | 893 |  | 2,153 |  |  |
Balance Sheet Data |  |  |  |  |  |  |  |
Total loans net |  | 59,973 | 62,037 |  | 66,405 |  | 59,973 |
Total assets |  | 93,807 | 80,622 |  | 84,924 |  | 93,807 |
Total funds borrowed |  | $ 53,719 | $ 65,924 |  | $ 68,666 |  | 53,719 |
Selected Financial Ratios |  |  |  |  |  |  |  |
Return on average assets |  | 4.27% | 1.07% |  | 2.44% |  |  |
Return on average equity |  | 9.43% | 5.17% |  | 12.21% |  |  |
Interest yield |  | 14.25% | 10.51% |  | 11.39% |  |  |
Net interest margin |  | 11.23% | 6.66% |  | 6.90% |  |  |
Reserve coverage |  | 0.00% | 0.00% | [4] | 0.00% | [4] |  |
Delinquency status | [3],[4] | 0.44% | 0.11% |  | 0.15% |  |  |
Charge-off ratio |  | 0.00% | 0.04% | [5] | 1.30% | [5] |  |
Operating Segments [Member] | Medallion Lending [Member] |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |
Total interest income |  | $ 6,317 | $ (1,518) |  | $ 3,665 |  |  |
Total interest expense |  | 10,125 | 3,610 |  | 7,962 |  |  |
Net interest income/net investment income |  | (3,808) | (5,128) |  | (4,297) |  |  |
Provision for loan losses |  | 41,437 | 42,276 |  | 16,331 |  |  |
Net interest income after provision for loan losses |  | (45,245) | (47,404) |  | (20,628) |  |  |
Other income (expense), net |  | 9,742 | (30,366) |  | (10,493) |  |  |
Income (loss) before income taxes/net investment loss before taxes |  | (35,503) | (77,770) |  | (31,121) |  |  |
Income tax (provision) benefit |  | 7,938 | 19,520 |  | 7,596 |  |  |
Net income (loss) after taxes/net increase (decrease) on net assets resulting from operations |  | (27,565) | (58,250) |  | (23,525) |  |  |
Balance Sheet Data |  |  |  |  |  |  |  |
Total loans net |  | 155,863 | 12,725 |  | 105,022 |  | 155,863 |
Total assets |  | 273,501 | 124,554 |  | 217,483 |  | 273,501 |
Total funds borrowed |  | $ 294,465 | $ 98,636 |  | $ 176,825 |  | 294,465 |
Selected Financial Ratios |  |  |  |  |  |  |  |
Return on average assets |  | (10.13%) | (33.21%) |  | (9.73%) |  |  |
Return on average equity |  |  | (165.21%) |  | (48.49%) |  |  |
Interest yield |  | 3.58% | (2.11%) |  | 2.88% |  |  |
Net interest margin |  | (2.16%) | (7.14%) |  | (3.38%) |  |  |
Reserve coverage |  | 15.11% | 66.31% |  | 19.48% |  |  |
Delinquency status | [3] | 9.43% | 3.57% |  | 2.04% |  |  |
Charge-off ratio |  | 7.21% | 59.38% |  | 14.68% |  |  |
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |
Segment Reporting Disclosure [Line Items] |  |  |  |  |  |  |  |
Total interest income |  | $ 1,741 | $ 1,575 |  | $ 2,308 |  |  |
Total interest expense |  | 3,792 | 9,128 |  | 6,030 |  |  |
Net interest income/net investment income |  | (2,051) | (7,553) |  | (3,722) |  |  |
Provision for loan losses |  |  | 27 |  | 455 |  |  |
Net interest income after provision for loan losses |  | (2,051) | (7,580) |  | (4,177) |  |  |
Other income (expense), net |  | (6,489) | (11,164) |  | (7,946) |  |  |
Income (loss) before income taxes/net investment loss before taxes |  | (8,540) | (18,744) |  | (12,123) |  |  |
Income tax (provision) benefit |  | 1,005 | 5,854 |  | 3,461 |  |  |
Net income (loss) after taxes/net increase (decrease) on net assets resulting from operations |  | (7,535) | (12,890) |  | (8,662) |  |  |
Balance Sheet Data |  |  |  |  |  |  |  |
Total loans net |  | 4,110 | 3,314 |  | 3,362 |  | 4,110 |
Total assets |  | 204,975 | 285,425 |  | 247,641 |  | 204,975 |
Total funds borrowed |  | $ 127,853 | $ 244,987 |  | $ 150,898 |  | $ 127,853 |
Selected Financial Ratios |  |  |  |  |  |  |  |
Return on average assets |  | (4.07%) | (5.06%) |  | (3.71%) |  |  |
Return on average equity |  | (12.37%) | (23.29%) |  | (14.26%) |  |  |
[1] | Balance includes the nine months ended December 31, 2018 under Bank Holding Company Accounting and the three months ended March 31, 2018 under Investment Company Accounting.
[2] | Includes $256 of net revenues received from Medallion Bank for the year ended December 31, 2018, primarily for expense reimbursements. See Notes 5 and 12 for additional information.
[3] | Loans 90 days or more past due.
[4] | Ratio is based on total commercial lending balances, and relates solely to the legacy commercial loan business.
[5] | Ratio is based on total commercial lending balances, and relates to the total loan business.

X
- Definition Chargeoffs To Loans Percentage + References No definition available. + Details
Name: | mfin_ChargeoffsToLoansPercentage
Namespace Prefix: | mfin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Delinquency status. + References No definition available. + Details
Name: | mfin_DelinquencyStatus
Namespace Prefix: | mfin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Income from sponsorship and race winnings. + References No definition available. + Details
Name: | mfin_IncomeFromSponsorshipAndRaceWinnings
Namespace Prefix: | mfin_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Interest expense, net. + References No definition available. + Details
Name: | mfin_InterestExpenseNet
Namespace Prefix: | mfin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Interest income expense operating. + References No definition available. + Details
Name: | mfin_InterestIncomeExpenseOperating
Namespace Prefix: | mfin_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Interest yield. + References No definition available. + Details
Name: | mfin_InterestYield
Namespace Prefix: | mfin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Net interest margin. + References No definition available. + Details
Name: | mfin_NetInterestMargin
Namespace Prefix: | mfin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Non interest expense income. + References No definition available. + Details
Name: | mfin_NonInterestExpenseIncome
Namespace Prefix: | mfin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of return on average equity. + References No definition available. + Details
Name: | mfin_PercentageOfReturnOnAverageEquity
Namespace Prefix: | mfin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Race team related expense. + References No definition available. + Details
Name: | mfin_RaceTeamRelatedExpense
Namespace Prefix: | mfin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Reserve Coverage Ratio + References No definition available. + Details
Name: | mfin_ReserveCoverageRatio
Namespace Prefix: | mfin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Return On Average Assets Percentage + References No definition available. + Details
Name: | mfin_ReturnOnAverageAssetsPercentage
Namespace Prefix: | mfin_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Segment reporting disclosure. + References No definition available. + Details
Name: | mfin_SegmentReportingDisclosureLineItems
Namespace Prefix: | mfin_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(11)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=121559654&loc=d3e5710-111685 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=116870748&loc=SL6758485-165988 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(12)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
Name: | us-gaap_Assets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_BalanceSheetRelatedDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. + References No definition available. + Details
Name: | us-gaap_DebtLongtermAndShorttermCombinedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(10)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(8)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(15)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120385591&loc=d3e38679-109324 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(9)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income or expense, including any amortization and accretion (as applicable) of discounts and premiums, including consideration of the provisions for loan, lease, credit, and other related losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.12) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_InterestIncomeExpenseAfterProvisionForLoanLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The net amount of operating interest income (expense). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.10) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_InterestIncomeExpenseNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentCompanyFinancialRatiosAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_LoansAndLeasesReceivableNetReportedAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(g)(1)(ii)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721683-107760 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=75031198&loc=d3e14064-108612 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-05(b)(2)) -URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884 Reference 8: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 14: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=120409616&loc=SL4591551-111686 Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3000-108585 Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569616-111683 Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 20: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=120409616&loc=SL4591552-111686 Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794 + Details
Name: | us-gaap_ProfitLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
Name: | us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mfin_RPACRacingLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mfin_ConsumerLendingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mfin_RecreationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsegmentsAxis=mfin_HomeImprovementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mfin_CommercialLendingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=mfin_MedallionLendingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_IntersegmentEliminationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |