Allowance for Loan and Lease Loss, Provision For (Recovery of) Bad Debts

No definition available.

Name:	ifcn_AllowanceforLoanandLeaseLossProvisionForRecoveryofBadDebts
Namespace Prefix:	ifcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Construction Loan, Commitment

+ References

No definition available.

+ Details

Name:	ifcn_ConstructionLoanCommitment
Namespace Prefix:	ifcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This element represents number of mortgage loans on real estate with outstanding principal balance.

+ References

No definition available.

+ Details

Name:	ifcn_MortgageLoansOnRealEstateNumberOfLoansOutstandingPrincipalBalance
Namespace Prefix:	ifcn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

This represents mortgage loans on real estate outstanding principal amount.

+ References

No definition available.

+ Details

Name:	ifcn_MortgageLoansOnRealEstateOutstandingPrincipalAmount
Namespace Prefix:	ifcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted average interest rate on mortgage loans.

+ References

No definition available.

+ Details

Name:	ifcn_MortgageLoansWeightedAverageInterestRate
Namespace Prefix:	ifcn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Payments to Fund Construction Loan

+ References

No definition available.

+ Details

Name:	ifcn_PaymentstoFundConstructionLoan
Namespace Prefix:	ifcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Real Estate Companies, Investment in Mortgage Loans on Real Estate, Sales

+ References

No definition available.

+ Details

Name:	ifcn_RealEstateCompaniesInvestmentinMortgageLoansonRealEstateSales
Namespace Prefix:	ifcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans Foreclosed

+ References

No definition available.

+ Details

Name:	ifcn_SECSchedule1229RealEstateCompaniesInvestmentinMortgageLoansonRealEstateNumberofLoansForeclosed
Namespace Prefix:	ifcn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans Repaid

+ References

No definition available.

+ Details

Name:	ifcn_SECSchedule1229RealEstateCompaniesInvestmentinMortgageLoansonRealEstateNumberofLoansRepaid
Namespace Prefix:	ifcn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of contractual principal due at origination of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column F
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column F))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	srt_MortgageLoansOnRealEstateFaceAmountOfMortgages
Namespace Prefix:	srt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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:	srt_MortgageLoansOnRealEstateLineItems
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of mortgage loans within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Footnote 3
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Footnote 3))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	srt_MortgageLoansOnRealEstateNumberOfLoans
Namespace Prefix:	srt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest and fee income from mortgage loans considered to be held-for-sale.

+ 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 210.9-04.1)
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

+ Details

Name:	us-gaap_InterestAndFeeIncomeLoansHeldForSaleMortgages
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_MortgageReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PerformingFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_NonperformingFinancingReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

MORTGAGE LOANS, NET (Details)	1 Months Ended		3 Months Ended			9 Months Ended		12 Months Ended
MORTGAGE LOANS, NET (Details)	Nov. 14, 2019 USD ($) Loan	May 31, 2019	Sep. 30, 2019 USD ($) Loan	Jun. 30, 2019	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Loan	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) Loan
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loan income, net			$ 340,000		$ 709,000	$ 1,438,000	$ 1,976,000
Provision for (recovery of) credit losses, net			$ 2,598,000		0	$ 1,463,000	(175,000)
Mortgage Receivable
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans \| Loan						4		6
Mortgage loans, net						$ 11,700,000		$ 23,200,000
Performing Financing Receivable
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate number of loans, outstanding principal balance (in loans) \| Loan								3
Performing Financing Receivable \| Mortgage Receivable
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans \| Loan						2
Mortgage loans weighted average interest rate (in percentage)			9.80%			9.80%		9.40%
Number of loans repaid \| Loan						1
Loan principal amount			$ 3,000,000			$ 3,000,000
Nonperforming Financing Receivable
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate number of loans, outstanding principal balance (in loans) \| Loan			2			2		3
Mortgage loans on real estate, outstanding principal amount			$ (15,300,000)			$ (15,300,000)		$ (13,100,000)
Fully Reserved Loan \| Nonperforming Financing Receivable \| Mortgage Receivable
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loans, net						$ 0
Mortgage loans on real estate number of loans, outstanding principal balance (in loans) \| Loan			2			2
Mezzanine Loan \| Mortgage Receivable
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage loans, net						$ 8,200,000
Number of loans foreclosed \| Loan						1
Pledged equity interest, collateral percent		100.00%		100.00%
Originated Construction Loan \| Mortgage Receivable
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loan principal amount					$ 13,100,000		$ 13,100,000
Construction loan funded			$ 2,000,000			$ 2,000,000
Loan remaining commitment			$ 11,100,000			$ 11,100,000
Subsequent Event
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Provision for (recovery of) credit losses, net	$ 2,600,000
Subsequent Event \| Mezzanine Loan \| Mortgage Receivable
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Number of loans \| Loan	1
Mortgage loans, net	$ 12,300,000