XML 72 R61.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Non Purchased Loans - Impact of Modifications Classified as Restructured Loans (Details) - Non purchased loans and leases $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 loan | Sep. 30, 2017 USD ($) loan | Sep. 30, 2018 USD ($) loan | Sep. 30, 2017 USD ($) loan
Restructured loans |  |  |  |
Number of Loans | loan | 0 | 5 | 5 | 13
Pre- Modification Outstanding Recorded Investment |  | $ 537 | $ 708 | $ 1,298
Post- Modification Outstanding Recorded Investment |  | $ 482 | $ 703 | $ 922
Real estate – 1-4 family mortgage |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan |  | 4 | 4 | 9
Pre- Modification Outstanding Recorded Investment |  | $ 307 | $ 625 | $ 611
Post- Modification Outstanding Recorded Investment |  | $ 307 | $ 625 | $ 601
Real estate – commercial mortgage |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan |  | 1 | 1 | 3
Pre- Modification Outstanding Recorded Investment |  | $ 230 | $ 83 | $ 683
Post- Modification Outstanding Recorded Investment |  | $ 175 | $ 78 | $ 318
Installment loans to individuals |  |  |  |
Restructured loans |  |  |  |
Number of Loans | loan |  |  |  | 1
Pre- Modification Outstanding Recorded Investment |  |  |  | $ 4
Post- Modification Outstanding Recorded Investment |  |  |  | $ 3

X
- Definition Troubled Debt Restructuring Financing Receivable Modifications [Abstract] + References No definition available. + Details
Name: | rnst_TroubledDebtRestructuringFinancingReceivableModificationsAbstract
Namespace Prefix: | rnst_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Pre-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

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

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

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