XML 75 R61.htm IDEA: XBRL DOCUMENT v3.20.4

Loans and Allowance for Loan Losses - Summary of Nonperforming Loan Portfolio (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	$ 62,174	$ 62,493
Unpaid principal balance, With related allowance	62,778	62,964
Related Allowance, With related allowance	25,310	15,156
Average Investment Recorded, With related allowance	65,933	61,109
Interest Income (Expense) Recognized, With related allowance	1,150	1,209
Recreation [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	7,639	8,262
Unpaid principal balance, With related allowance	7,639	8,262
Related Allowance, With related allowance	264	329
Average Investment Recorded, With related allowance	7,949	8,317
Interest Income (Expense) Recognized, With related allowance	560	471
Home Improvement [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	171	185
Unpaid principal balance, With related allowance	171	185
Related Allowance, With related allowance	3	3
Average Investment Recorded, With related allowance	172	185
Interest Income (Expense) Recognized, With related allowance	2
Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	16,596	11,862
Unpaid principal balance, With related allowance	16,600	11,867
Average Investment Recorded, With related allowance	16,884	7,886
Interest Income (Expense) Recognized, With related allowance	123	392
Medallion [Member]
Financing Receivable, Recorded Investment [Line Items]
Recorded Investment, With related allowance	37,768	42,184
Unpaid principal balance, With related allowance	38,368	42,650
Related Allowance, With related allowance	25,043	14,824
Average Investment Recorded, With related allowance	40,928	44,721
Interest Income (Expense) Recognized, With related allowance	$ 465	$ 346

X

- Definition

Impaired financing receivable with related allowance interest income and adjusted interest expense accrual method.

+ References

No definition available.

+ Details

Name:	mfin_ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAndAdjustedInterestExpenseAccrualMethod
Namespace Prefix:	mfin_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Impaired Financing Receivables With Related Allowance Related Allowance

+ References

No definition available.

+ Details

Name:	mfin_ImpairedFinancingReceivablesWithRelatedAllowanceRelatedAllowance
Namespace Prefix:	mfin_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

+ Details

Name:	us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfin_RecreationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfin_HomeImprovementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfin_CommercialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=mfin_MedallionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: