XML 66 R52.htm IDEA: XBRL DOCUMENT
v3.20.1

Loans and Allowance for Loan Losses - Non Accruals 1 (Detail) - USD ($) $ in Thousands | Mar. 31, 2020 | Jun. 30, 2019
--- | --- | ---
Real estate loans |  |
Total | $ 1,437 | $ 1,505
One- to four-family [Member] |  |
Real estate loans |  |
Total | 1,420 | 1,475
Multi-family [Member] |  |
Real estate loans |  |
Total | 0 |
Home equity lines of credit [Member] |  |
Real estate loans |  |
Total | 16 | 22
Real Estate Loan [Member] |  |
Real estate loans |  |
Total | 1,437 | 1,503
Construction [Member] |  |
Real estate loans |  |
Total | 0 |
Commercial [Member] |  |
Real estate loans |  |
Total | 1 | 6
Commercial Business Loans [Member] |  |
Real estate loans |  |
Total | 0 |
Consumer Loans [Member] |  |
Real estate loans |  |
Total | $ 0 | $ 2

X
- Definition Financing receivable recorded investment troubled debt restructurings. + References No definition available. + Details
Name: | iroq_FinancingReceivableRecordedInvestmentTroubledDebtRestructuringsAbstract
Namespace Prefix: | iroq_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=118939409&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=iroq_RealEstateLoansOneToFourFamilyIncludingHomeEquityLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=iroq_RealEstateLoansMultiFamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=iroq_RealEstateLoansHomeEquityLinesOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=iroq_ConsumerLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |