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

No definition available.

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

- Definition

Mortgage Loans On Real Estate, Number of New Loan Originations

+ References

No definition available.

+ Details

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Namespace Prefix:	ifcn_
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Balance Type:	na
Period Type:	duration

- Definition

This represents mortgage loans on real estate outstanding principal amount.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Mortgage Loans On Real Estate, Variable Interest Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	ifcn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate on mortgage loans.

+ References

No definition available.

+ Details

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

- Definition

Mortgage Loans on Real Estate, Pledged Equity Interest, Collateral Percent

+ References

No definition available.

+ Details

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Namespace Prefix:	ifcn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.1)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

+ Details

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

- Definition

The carrying amount of the outstanding balance due under the mortgage loan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule IV)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

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

+ Details

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

- Definition

Amount of the contractual principal due at the origination of the mortgage loan (face amount).

+ References

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule IV)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

+ Details

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

- Definition

The stated interest rate on the mortgage loan receivable or the weighted average interest rate on a group of loans.

+ References

+ Details

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

- 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

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

- Definition

Indicates the number of mortgages under each classification.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29.3)
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04.(c) Schedule IV)
-URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_MortgageReceivablesMember
Namespace Prefix:
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Period Type:

- Details

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- Details

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- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
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- Details

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- Details

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MORTGAGE LOANS, NET (Details)	3 Months Ended		12 Months Ended
MORTGAGE LOANS, NET (Details)	Mar. 31, 2019 USD ($) Loan	Mar. 31, 2018 USD ($) Loan	Dec. 31, 2018 USD ($) Loan
Mortgage Loans on Real Estate [Line Items]
Mortgage loan income, net \| $	$ 650,000	$ 625,000
Mortgage Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	6		6
Carrying amount of mortgages \| $	$ 23,500,000		$ 23,200,000
Nonperforming Financing Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loans on real estate number of loans, outstanding principal balance (in loans)	3
Mortgage loans on real estate, outstanding principal amount \| $	$ (13,100,000)		$ (13,100,000)
Performing Financing Receivable [Member] \| Mortgage Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans			3
Mortgage loans weighted average interest rate (in percentage)	9.50%		9.40%
Originated Construction Loan [Member]
Mortgage Loans on Real Estate [Line Items]
Number of new loan originations		1
Originated Construction Loan [Member] \| Mortgage Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
New loan originations, face amount \| $		$ 13,100,000
Mezzanine Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans			1
Mezzanine Loan One [Member] \| Mortgage Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans			1
Carrying amount of mortgages \| $			$ 8,200,000
Pledged equity interest, collateral percent			100.00%
Mezzanine Loan One [Member] \| LIBOR [Member] \| Mortgage Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Variable interest rate			9.75%
Annual interest rate	12.26%
Fully Reserved Loan [Member] \| Nonperforming Financing Receivable [Member] \| Mortgage Receivable [Member]
Mortgage Loans on Real Estate [Line Items]
Carrying amount of mortgages \| $			$ 0
Mortgage loans on real estate number of loans, outstanding principal balance (in loans)			2